WO2018124195A1 - 電解水生成装置 - Google Patents
電解水生成装置 Download PDFInfo
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- WO2018124195A1 WO2018124195A1 PCT/JP2017/046950 JP2017046950W WO2018124195A1 WO 2018124195 A1 WO2018124195 A1 WO 2018124195A1 JP 2017046950 W JP2017046950 W JP 2017046950W WO 2018124195 A1 WO2018124195 A1 WO 2018124195A1
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- electrolyzed water
- oxide
- rhodium
- iridium
- atoms
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
- C25B11/093—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
- C02F2001/46185—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water only anodic or acidic water, e.g. for oxidizing or sterilizing
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
- E03D9/08—Devices in the bowl producing upwardly-directed sprays; Modifications of the bowl for use with such devices ; Bidets; Combinations of bowls with urinals or bidets; Hot-air or other devices mounted in or on the bowl, urinal or bidet for cleaning or disinfecting
Definitions
- An aspect of the present invention generally relates to an electrolyzed water generator.
- Patent Document 1 discloses a technique for electrolyzing water containing chloride ions in an electrolytic cell and spraying sterilized water containing hypochlorous acid generated thereby onto a toilet to suppress the growth of bacteria.
- tap water is mainly used.
- the scale which has sodium, calcium, potassium, magnesium, etc. contained in tap water as a main component adheres to the cathode surface.
- the electrolysis performance may be lowered, and the sterilizing water generating ability may be lowered.
- Patent Document 2 discloses a technique for extending the life of the electrode and improving the ability to produce sterilizing water even when a pole change is performed.
- the electrolyzed water generator is desired to have a longer life.
- the size of the electrolyzed water generator is increased and the cost is increased.
- the present invention has been made on the basis of recognition of such problems, and an object thereof is to provide an electrolyzed water generating apparatus capable of further extending the life of an electrode while suppressing increase in size and cost. .
- 1st invention is the electrolyzed water generating apparatus which electrolyzes the water containing a chloride ion, and produces
- the electrode has a catalyst layer containing iridium oxide, tantalum oxide, and rhodium oxide, and in the catalyst layer, the number of iridium atoms contained in the iridium oxide and the oxidation
- the ratio of the number of rhodium atoms to the sum of the number of tantalum atoms contained in tantalum and the number of rhodium atoms contained in the rhodium oxide is 31% or more and 60% or less.
- the ratio of the number of tantalum atoms to the number of iridium atoms is 0.3 or more and 1.8 or less.
- This electrolyzed water generating device can further extend the durability life.
- the third invention is the electrolyzed water generating device according to the first invention, wherein the ratio of the number of tantalum atoms to the number of iridium atoms is 0.4 or more and 1.1 or less.
- This electrolyzed water generating device can further extend the durability life.
- an electrolyzed water generating apparatus that can further extend the life of the electrode.
- Drawing 1 is a perspective view of a toilet device which has an electrolyzed water generating device concerning an embodiment.
- the toilet apparatus shown in FIG. 1 includes a Western-style seat toilet (hereinafter simply referred to as “toilet bowl”) 80 and a sanitary washing device 10 provided thereon.
- the sanitary washing device 10 includes a casing 40, a toilet seat 20, and a toilet lid 30.
- the toilet seat 20 and the toilet lid 30 are pivotally supported with respect to the casing 40 so as to be freely opened and closed.
- a body washing function unit for realizing washing of a user who has sat on the toilet seat 20 such as a “butt” is incorporated.
- a human body detection sensor that detects the approach and separation of the user from the toilet device, a seating detection sensor that detects that the user is sitting on the toilet seat 20, and the like are appropriately provided.
- the user can, for example, operate the remote controller 50 to move the cleaning nozzle 44 into the bowl 81 of the toilet 80 or to move the cleaning nozzle 44 back into the casing 40.
- the cleaning nozzle 44 has advanced into the bowl 81.
- a plurality of water discharge ports (spout holes) 45 are provided at the tip of the cleaning nozzle 44.
- the washing nozzle 44 can wash water such as a “butt” of a user sitting on the toilet seat 20 by spraying water from a water discharge port 45 provided at the tip of the washing nozzle 44.
- the upper side is “upper” when viewed from the user sitting on the toilet seat 20, and the lower side is “lower” when viewed from the user sitting on the toilet seat 20.
- the front is “front” when viewed from the user sitting on the toilet seat 20, and the rear is “back” when viewed from the user sitting on the toilet seat 20.
- the right side of the user sitting on the toilet seat 20 is referred to as “right side”
- the left side of the user sitting on the toilet seat 20 is referred to as “left side”.
- FIG. 2 is a block diagram showing a main configuration of a water channel system including the electrolyzed water generating device according to the embodiment.
- the sanitary washing device 10 has a flow path (pipe) 40 a that guides tap water supplied from a water supply source such as a water supply or a water storage tank to the water discharge port 45 of the cleaning nozzle 44.
- a valve 42 such as an electromagnetic valve is provided on the upstream side of the flow path 40a. The valve 42 controls the supply of tap water to the flow path 40 a based on a command from the control unit 41 provided inside the casing 40.
- the electrolyzed water generating apparatus 1 is provided downstream of the valve 42.
- a safety valve a pressure regulating valve that adjusts the pressure of water flowing through the flow path 40a, a pump that changes the flow rate of water, a heat exchanger that heats water, and the like. May be provided as appropriate.
- the electrolyzed water generating apparatus 1 has a pair of electrodes inside thereof, and electrolyzes tap water flowing through the inside under the control of energization from the control unit 41. Since tap water contains chloride ions, hypochlorous acid is generated by electrolyzing chloride ions. As a result, the water electrolyzed in the electrolyzed water generating apparatus 1 (electrolyzed water) changes into a liquid containing hypochlorous acid.
- Hypochlorous acid functions as a bactericidal component.
- the electrolyzed water containing hypochlorous acid is sprayed from the water discharge port 45 of the cleaning nozzle 44 or is sprayed toward the outer peripheral surface (body) and the water discharge port 45 of the cleaning nozzle 44.
- the flow path downstream from the electrolyzed water generator 1, the outer peripheral surface of the cleaning nozzle 44, and the water discharge port 45 are sterilized by the electrolyzed water.
- a flow path switching valve 43 is provided downstream of the electrolyzed water generator 1.
- the flow path switching valve 43 includes a vacuum breaker (atmospheric release port) 431 and a flow rate adjustment valve 432.
- the vacuum breaker 431 is arranged in the middle of the flow path for leading the water or the electrolyzed water supplied from the electrolyzed water generating device 1 to the water discharge port 45 of the cleaning nozzle 44, and prevents the water or the electrolyzed water from flowing backward.
- the vacuum breaker 431 promotes water drainage in the flow path 40a by taking in air.
- a flow rate adjustment valve 432 is provided downstream (at the atmosphere opening side) of the vacuum breaker 431.
- the flow rate adjusting valve 432 is connected to a flow path that guides the cleaning water to the spout cleaning water discharge port 45, a flow path that guides the cleaning water to the bidet cleaning water discharge port, a flow channel that guides the cleaning water to the nozzle cleaning chamber 47, and the like. Open / close and switch water supply. That is, the flow rate adjustment valve 432 has a plurality of ports that can selectively communicate with the plurality of water discharge ports 45.
- a cleaning nozzle 44 is provided downstream of the flow rate adjustment valve 432.
- the washing nozzle 44 receives the driving force from the nozzle motor 46 and can advance from the inside of the casing 40 into the bowl 81 of the toilet 80 or retreat into the casing 40. That is, the nozzle motor 46 can move the cleaning nozzle 44 forward and backward based on a command from the control unit 41.
- the flow rate adjustment valve 432 moves as the cleaning nozzle 44 advances and retreats. That is, the flow rate adjustment valve 432 moves together with the cleaning nozzle 44.
- a nozzle cleaning chamber 47 is provided downstream of the flow rate adjustment valve 432.
- the nozzle cleaning chamber 47 is fixed to the inside of the casing 40 and can wash the cleaning nozzle 44 in a standby state that has moved backward into the casing 40.
- the nozzle cleaning chamber 47 can clean the outer peripheral surface of the cleaning nozzle 44 that is moving forward and backward.
- the nozzle cleaning chamber 47 can sterilize or clean the outer peripheral surface of the cleaning nozzle 44 by spraying electrolyzed water or water from a water discharge unit (not shown) provided therein.
- Drawing 3 is a sectional view showing the electrolyzed water generating device by an embodiment.
- the electrolyzed water generating device 1 includes an electrolytic cell 2 and a pair of electrodes 3 and 4.
- the electrodes 3 and 4 are provided inside the electrolytic cell 2 and connected to a power source.
- tap water passing through the inside of the electrolytic cell 2 is electrolyzed.
- 3A shows a state in which a voltage is applied so that the electrode 3 becomes a cathode and the electrode 4 becomes an anode
- FIG. 3B shows that the electrode 3 becomes an anode and the electrode 4 becomes a cathode.
- a state in which a voltage is applied is shown.
- the control unit 41 performs pole change from the state shown in FIG. 3A to the state shown in FIG. 3B at a predetermined timing, and reverses the polarity of the voltage applied to the electrodes 3 and 4. .
- the electrode 3 functioning as the cathode becomes the anode
- the electrode 4 functioning as the anode becomes the cathode. Since an acid is generated in the electrode 3 to which the scale is attached and the scale is dissolved by this acid, the scale attached to the electrode 3 can be peeled off.
- the control unit 41 measures, for example, the cumulative time during which electrolysis is performed in the electrolyzed water generating device 1 after the last pole change. In addition, the control unit 41 is previously set with a cumulative time for performing a pole change. The control unit 41 performs pole change by controlling the power source when the accumulation of the electrolysis time reaches a preset accumulation time. For example, when the voltage applied between the electrodes 3 and 4 is 5 V, the pole change is performed every 60 seconds.
- Drawing 4 is a sectional view showing composition of an electrode contained in an electrolyzed water generating device concerning an embodiment.
- the electrode 3 includes a base 3 a and a catalyst layer 3 b provided thereon.
- the configuration of the electrode 3 is illustrated, but the electrode 4 has a similar configuration.
- the base 3a is made of, for example, titanium or a titanium-based alloy.
- a titanium-based alloy a conductive alloy having corrosion resistance mainly composed of titanium is used.
- Ti—Ta—Nb, Ti—Pd, Ti—Zr, Ti—Al, or the like can be used.
- the catalyst layer 3b contains iridium oxide, tantalum oxide, and rhodium oxide.
- the catalyst layer 3b is composed of, for example, a plurality of layers as shown in FIG. 4, and each layer includes iridium oxide, tantalum oxide, and rhodium oxide. Further, another intermediate layer may be provided between the base 3a and the catalyst layer 3b.
- iridium oxide acts as a catalyst when chlorine is produced, and promotes the production of chlorine.
- rhodium oxide is considered to act as a catalyst when hydrogen is produced and to promote the production of hydrogen.
- Tantalum oxide carries iridium oxide and rhodium oxide.
- the electrodes 3 and 4 are manufactured by the following method, for example. First, the base 3a is prepared, and the surface of the base 3a is roughened by blasting or the like. Further, the surface of the substrate may be oxidized by baking the treated substrate 3a in the air.
- a solution in which an iridium compound, a tantalum compound, and a rhodium compound are dissolved is applied onto the surface of the substrate 3a. And by baking the base
- the application and firing may be repeated.
- hypochlorous acid generated with the passage of time decreases, and hypochlorous acid is no longer generated. This is presumably because iridium oxide contained in the catalyst layer 3b is detached from the catalyst layer 3b, or the catalyst layer 3b is peeled off from the substrate 3a.
- the inventor of the present application investigated the accumulated time (durable life) in which hypochlorous acid can be generated in the electrolyzed water generator 1 while changing the ratio of rhodium oxide contained in the catalyst layer 3b.
- Table 1 and FIGS. 5 and 6 show changes in the endurance life when the rhodium content in the catalyst layer 3b is changed.
- Table 1 shows the content (mol%) of each metal element of iridium (Ir), tantalum (Ta), and rhodium (Rh) contained in the catalyst layer 3b, and the durable life at that time.
- the horizontal axis represents the rhodium content
- the vertical axis represents the durable life.
- FIG. 6 is a diagram in which a horizontal dotted line and a vertical dotted line are added to FIG.
- the dotted line on the horizontal axis is a line indicating a durable life of 500 hr
- the dotted line on the vertical axis is a line indicating an Rh content of 60 mol%.
- the thickness of each catalyst layer 3b was 3.6 ⁇ m.
- the ratio of the tantalum content to the iridium content was 0.6.
- each metal element refers to each metal with respect to the sum of the number of iridium atoms contained in iridium oxide, the number of tantalum atoms contained in tantalum oxide, and the number of rhodium atoms contained in rhodium oxide. This means the ratio of the number of atoms in the element.
- the inventor of the present application discovered the following.
- the durability life is remarkably short.
- the durability life was extended as compared with the case where rhodium was not contained.
- the durability life was 31 mol% or more, the durability life was further extended.
- the rhodium content was more than 50 mol% and reached 70 mol%, the durability life was shortened.
- the general durable life of a product is 10 years.
- the electrodes 3 and 4 are energized for a total of 500 hours on average.
- the rhodium content was more than 60 mol% and reached 70 mol%, the endurance life was shorter than the energization time of 500 hours, which is the endurance life of 10 years.
- the inventor of the present application has an energization time of 500 hours or more, which is a 10-year durable life, in a rhodium content not including the rhodium content disclosed in Patent Document 2 in a range of 31 mol% to 60 mol%. It has been found that a suitable long life is obtained. In particular, it has been discovered that the longest durability life can be obtained when the rhodium content is 50 mol%.
- the ratio of the number of rhodium atoms to the sum of the number of iridium atoms contained in iridium oxide, the number of tantalum atoms contained in tantalum oxide, and the number of rhodium atoms contained in rhodium oxide is 31% or more and 60% or less is preferable. In particular, the ratio is more preferably 50% or less.
- rhodium oxide is considered to function as a catalyst when hydrogen is generated from water. That is, rhodium oxide does not contribute directly to the production of chlorine. For this reason, conventionally, as disclosed in Patent Document 2, the content of rhodium oxide in the catalyst layer has been set to 30 mol% or less, which is lower than the content of iridium or the like. However, the inventor of the present application has found from the results of experiments that the durable life can be improved by setting the rhodium oxide content to 31 mol% or higher, which is higher than the conventional one.
- Table 2 and FIG. 7 show changes in the endurance life when the rhodium content in the catalyst layer 3b is substantially constant and the iridium and tantalum contents are changed.
- the thickness of each catalyst layer 3b was 3.6 ⁇ m.
- the durable life is greatly reduced.
- tantalum when the ratio of tantalum oxide in the catalyst layer 3b is low, it is considered that iridium oxide and rhodium oxide cannot be sufficiently supported, and these components are easily detached, and the durability life is shortened. Therefore, it is desirable that the catalyst layer 3b contains at least iridium oxide, tantalum oxide, and rhodium oxide.
- Table 3 shows changes in the durable life when the rhodium content in the catalyst layer 3 b is substantially constant and the experimental conditions are further changed.
- FIG. 8 is a graph showing a change in durability life when the Ta / Ir ratio in the catalyst layer of the electrode is changed. In this experiment, the thickness of each catalyst layer 3b was 3.6 ⁇ m.
- the product has a durable life of 500 hours or more, which is a general 10-year durable life, as the durable life of the product. It turns out that it will be a lifetime. It can also be seen that the durability life is shortened when the Ta / Ir ratio is 1.1 or more. Furthermore, it can be seen that when the Ta / Ir ratio is greater than 1.8, the durability life is short, that is, a current-carrying time of 500 hours or less, which is a durability life of 10 years.
- the ratio of the number of tantalum atoms contained in tantalum oxide to the number of iridium atoms contained in iridium oxide is preferably 0.3 or more and 1.8 or less.
- the ratio of the number of tantalum atoms contained in tantalum oxide to the number of iridium atoms contained in iridium is more preferably 0.4 or more and 1.1 or less.
- FIG. 9 is a graph showing the result of electrode composition analysis.
- FIG. 9A shows a result before using the electrolyzed water generating apparatus 1
- FIG. 9B shows a result after performing electrolysis with the electrolyzed water generating apparatus 1 for 730 hours.
- the composition analysis was performed by energy dispersive X-ray spectroscopy (SEM-EDX) using an electrode having a catalyst layer with a rhodium content of 31 mol%.
- the present embodiment it is possible to extend the durability life of the electrode without increasing the thickness or size of the catalyst layer. That is, according to the present embodiment, it is possible to extend the durable life of the electrolyzed water generating device while suppressing an increase in size and cost of the electrolyzed water generating device.
- the electrolyzed water generating device 1 having a long durability life for the toilet device it is possible to suppress a decrease in the concentration of hypochlorous acid accompanying the generation of the electrolyzed water, and it is possible to suppress a decrease in the bactericidal action.
- the exchange cycle of the electrolyzed water generating apparatus 1 can be lengthened, and the toilet apparatus can be used continuously for a longer period of time.
- generation apparatus 1 was applied to the toilet apparatus was demonstrated here.
- the electrolyzed water generating device 1 according to the present embodiment can be applied to other than toilet devices. For example, by spraying the electrolyzed water generated by the electrolyzed water generating device 1 onto the bowl surface of a urinal, the floor surface of a bathroom, or the bowl surface of a hand-washer, etc., the growth of bacteria in these places can be suppressed. Can do.
- 1 electrolyzed water generator 1 electrolyzed water generator, 2 electrolytic cell, 3, 4 electrode, 3a substrate, 3b catalyst layer, 10 sanitary washing device, 20 toilet seat, 30 toilet lid, 40 casing, 40a flow path, 41 control section, 42 valve, 43 flow Road switching valve, 431mm vacuum breaker, 432mm flow rate adjustment valve, 44mm cleaning nozzle, 45mm spout, 46mm nozzle motor, 47mm nozzle cleaning room, 50mm remote control, 80mm toilet, 81mm bowl
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- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
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- Environmental & Geological Engineering (AREA)
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- Epidemiology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
このような電解には、主に水道水が使用される。このため、水道水に含まれるナトリウム、カルシウム、カリウム、マグネシウム等を主成分とするスケールが、陰極表面に付着する。電極に付着するスケールの量が多くなると、電解性能が低下し、殺菌水生成能力が低下する可能性がある。
本発明は、かかる課題の認識に基づいてなされたものであり、大型化やコストの増加を抑制しつつ、電極の寿命をさらに延ばすことが可能な電解水生成装置を提供することを目的とする。
図1に表したトイレ装置は、洋式腰掛便器(以下説明の便宜上、単に「便器」と称する)80と、その上に設けられた衛生洗浄装置10と、を備える。衛生洗浄装置10は、ケーシング40と、便座20と、便蓋30と、を有する。便座20と便蓋30とは、ケーシング40に対して開閉自在にそれぞれ軸支されている。
図3に表したように、電解水生成装置1は、電解槽2と、一対の電極3および4と、を有する。電極3および4は、電解槽2の内部に設けられ、電源に接続されている。電極3および4に電圧が印加されることで、電解槽2の内部を通過する水道水が電気分解される。なお、図3(a)は、電極3が陰極となり、電極4が陽極となるように電圧が印加された状態を表し、図3(b)は、電極3が陽極となり、電極4が陰極となるように電圧が印加された状態を表している。
図4に表したように、電極3は、基体3aと、その上に設けられた触媒層3bと、を有する。なお、図4では、電極3の構成を例示しているが、電極4も同様の構成を有する。
まず、基体3aを用意し、基体3aの表面をブラスト処理などで粗面化する。さらに、処理後の基体3aを大気中で焼成することにより、基体の表面を酸化してもよい。
この実験において、触媒層3bの厚みは、いずれも3.6μmとした。また、ロジウム以外のタンタルとイリジウムについては、イリジウムの含有率に対するタンタルの含有率の比を、0.6とした。
ロジウムが含まれていない場合、耐久寿命は著しく短い。ロジウムの含有率が3モル%または10モル%の場合、ロジウムが含まれていない場合に比べて、耐久寿命が延びた。そして、ロジウムの含有率が31モル%以上となったところで、さらに耐久寿命が延びた。一方、ロジウムの含有率が50モル%を超えて70モル%になると、耐久寿命は短くなった。
また、製品の一般的な耐久寿命は、10年である。衛生洗浄装置10が10年間使用される場合、平均的に、電極3及び4には、累計で500hr通電される。ロジウムの含有率が60モル%を超えて70モル%になると、耐久寿命は、10年の耐久寿命である通電時間500hrより短くなった。
図8は、電極の触媒層におけるTa/Ir比率を変化させた際の、耐久寿命の変化を表すグラフである。この実験において、触媒層3bの厚みは、いずれも3.6μmとした。
図9(a)は、電解水生成装置1を使用する前の結果を表し、図9(b)は、電解水生成装置1で730時間電解を行った後の結果を表している。組成分析は、ロジウムの含有率が31モル%の触媒層を有する電極を用いて、エネルギー分散型X線分光法(SEM-EDX)により行った。
また、前述した各実施の形態が備える各要素は、技術的に可能な限りにおいて組み合わせることができ、これらを組み合わせたものも本発明の特徴を含む限り本発明の範囲に包含される。
Claims (3)
- 塩化物イオンを含む水を電解し、次亜塩素酸を含む電解水を生成する電解水生成装置であって、
前記水が通過する電解槽と、
前記電解槽内に設けられる電極と、
を備え、
前記電極は、酸化イリジウムと、酸化タンタルと、酸化ロジウムと、を含む触媒層を有し、
前記触媒層において、前記酸化イリジウムに含まれるイリジウムの原子数と、前記酸化タンタルに含まれるタンタルの原子数と、前記酸化ロジウムに含まれるロジウムの原子数と、の和に対する、前記ロジウムの原子数の割合は、31%以上60%以下である電解水生成装置。 - 前記イリジウムの原子数に対する、前記タンタルの原子数の比は、0.3以上1.8以下である請求項1記載の電解水生成装置。
- 前記イリジウムの原子数に対する、前記タンタルの原子数の比は、0.4以上1.1以下である請求項1または2記載の電解水生成装置。
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US16/348,587 US20200055752A1 (en) | 2016-12-28 | 2017-12-27 | Electrolyzed water production device |
EP17889032.3A EP3567136A4 (en) | 2016-12-28 | 2017-12-27 | ELECTROLYZED WATER PRODUCTION DEVICE |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013142166A (ja) * | 2012-01-10 | 2013-07-22 | Ishifuku Metal Ind Co Ltd | 殺菌水生成用電極及びその製造方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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GB1420814A (en) | 1973-04-06 | 1976-01-14 | Lumenition Ltd | Ignition timing for internal combustion engines |
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JPS5964788A (ja) * | 1982-09-30 | 1984-04-12 | Asahi Chem Ind Co Ltd | 電解用電極およびその製造方法 |
JPH01208499A (ja) * | 1988-02-17 | 1989-08-22 | Daiso Co Ltd | 電気メッキ用電極 |
JPH01301878A (ja) * | 1988-05-31 | 1989-12-06 | Tanaka Kikinzoku Kogyo Kk | 電解用電極の製造方法 |
JP3658823B2 (ja) * | 1995-11-30 | 2005-06-08 | ダイソー株式会社 | 電解用電極およびその製造方法 |
JP4554542B2 (ja) * | 2006-03-09 | 2010-09-29 | 石福金属興業株式会社 | 電解用電極 |
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JP5093762B2 (ja) * | 2010-07-28 | 2012-12-12 | Toto株式会社 | 衛生洗浄装置 |
CN103194765A (zh) * | 2012-01-10 | 2013-07-10 | 石福金属兴业株式会社 | 杀菌水生成装置 |
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CA3048178C (en) | 2022-03-01 |
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