CN107290408A - A kind of application of electrochemical oxygen sensor sensitive material - Google Patents
A kind of application of electrochemical oxygen sensor sensitive material Download PDFInfo
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- CN107290408A CN107290408A CN201710575753.9A CN201710575753A CN107290408A CN 107290408 A CN107290408 A CN 107290408A CN 201710575753 A CN201710575753 A CN 201710575753A CN 107290408 A CN107290408 A CN 107290408A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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Abstract
The present invention is a kind of application of electrochemical oxygen sensor sensitive material, in electrochemical technology field.The sensitive material includes the additive addition part of noble metal sensitization material, inorganic additive and one or more kinds of metal oxides that one or more are supported in conductive carbon；The oxygen sensor includes the electrode that two or more are contacted with acidic electrolysis bath.The present invention is under conditions of acidic electrolyte bath, and sensitive material of its novelty composition combines more active in oxygen gas diffusion electrode and more stable, and can provide detection, alarm signal.
Description
The application is applying date 2015-9-22, application number 2015106094420, denomination of invention one kind for electrification
Learn the divisional application of preparation and the application of oxygen sensor sensitive material
Technical field
The invention belongs to electrochemical material technical field, a kind of answering for electrochemical oxygen sensor material is especially related to
With.
Background technology
The oxygen sensor of electrochemical principle has the advantages that sensitivity is high, selective good, but the sensitive material of oxygen
The performance of oxygen sensor is determined, such as needs to improve the efficiency of oxygen reduction in industry and alarm for safety guard, shortens to oxygen
The gas corresponding time.And the long-term work in acidic electrolyte bath of most of sensitive material can fail, the mistake of oxygen sensor is caused
Report and misrepresent deliberately.
Noble metal is it is well known that the elctro-catalyst of particularly platinum group is generally applicable to oxygen in oxygen electro-catalysis field
In gas gas diffusion electrode structures, and it is applied to the commercialization of acidic electrolyte bath there is extremely important effect, but faces this
Had some limitations in terms of corrosive environment, the stability of sensor.Therefore needed badly among prior art a kind of new
The technical scheme of type solves this problem.
The content of the invention
The technical problems to be solved by the invention are：A kind of answering for electrochemical oxygen sensor sensitive material is provided
With, under conditions of acidic electrolyte bath, its novelty composition sensitive material combine it is more active in oxygen gas diffusion electrode,
And it is more stable, and detection, alarm signal can be provided.
A kind of application for electrochemical oxygen sensor sensitive material, it is characterized in that：One kind is used for electrochemical oxygen and passed
Sensor sensitive material is applied to oxygen sensor, and the sensitive material is supported on expensive in conductive carbon including one or more
The additive addition part of metal sensitive material, inorganic additive and one or more kinds of metal oxides；The oxygen
Sensor includes the electrode that two or more are contacted with acidic electrolysis bath.
The electrode includes metal platinum Pt, ruthenium Ru, iridium Ir, gold Au, palladium Pd or silver Ag, selected from platinum Pt, ruthenium Ru, iridium Ir, gold
Au, palladium Pd or silver Ag metal oxide, and the metal and metal oxide mixture, or carbon black, graphite, carbon receives
Mitron, carbon fiber, activated carbon and their mixture.
The content of the additive of sensitive material is 10%~15% in the electrode.
The content of the additive addition part of one or more kinds of metal oxides is 5%~10%.
By above-mentioned design, the present invention can bring following beneficial effect：One kind is used for electrochemical oxygen sensor
The application of sensitive material, under conditions of acidic electrolyte bath, the sensitive material of its novelty composition is combined spreads electricity in oxygen gas
It is more active in extremely and more stable, and detection, alarm signal can be provided.Using carbon, carbon black, graphite, CNT, carbon fiber,
Activated carbon and their mixture are as conductive carrier, with higher specific area, electric conductivity and suitable porosity.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated：
Fig. 1 is a kind of preparation method schematic process flow diagram for electrochemical oxygen sensor sensitive material of the invention.
Embodiment
A kind of preparation method for electrochemical oxygen sensor sensitive material, as shown in figure 1, comprise the following steps,
Step 1: taking 250ml noble metal precursors salting liquid, 400mg conductive carriers, 400mg conductive carrier is disperseed
Into 250ml noble metal precursor salting liquid, lasting stirring, and add 100mg maceration extracts；
Step 2: under conditions of 15 DEG C~30 DEG C, 100mg maceration extracts, leaching are added into the mixed liquor of the step one
The concentration of stain liquid is 10mg/m, while adding alkaline solution, the pH value of solution is adjusted to 10~11, the noble metal of load is obtained
The quiet solution of material；
Step 3: the quiet solution of precious metals species that the step 2 is obtained into load is centrifuged, rotating speed is 4000rmp,
Adopt and be washed with deionized, washing to detection chloride ion content is 0, and under conditions of vacuum, dries 4h, obtains xeraphium
End, that is, obtain the sensitive material of electrochemical oxygen sensor.
One kind is used for electrochemical oxygen sensor sensitive material and is applied to oxygen sensor, and the sensitive material includes one kind
Or more than one are supported on noble metal sensitization material, inorganic additive and the one or more kinds of metal oxidations in conductive carbon
The additive addition part of thing；The oxygen sensor includes the electrode that two or more are contacted with acidic electrolysis bath.
The conductive carrier is carbon, carbon black, graphite, CNT, carbon fiber, activated carbon and their mixture；It is described
Conductive carrier has higher electric conductivity；The conductive carrier has suitable porosity.The conductive carrier has higher
Specific surface area.For example Cabot Corp Vulcan XC-72, are particularly suitable for this scope.
The maceration extract is strong reductant, and reduction potential is less than 0.13V/SHE.As reducing agent, preferably sodium borohydride,
But other suitable reducing agents include lithium borohydride, potassium borohydride, hydrazine, formaldehyde and metallic aluminium, zinc etc..
The concentration of the maceration extract is 10mg/ml~50mg/ml.
In one aspect, the sensitive material of electrochemical oxygen sensor, including：Described oxygen sensor can for example be wrapped
Include at least two electrodes contacted with acidic electrolysis bath.
The sensitive material of at least one noble metal is included, the sensitive material is supported in conductive carbon comprising at least one
Noble metal sensitization material, the additive addition part at least including inorganic additive or at least one metal oxide.
The electrode for example may include the metal selected from Pt, Ru, Ir, Au, Pd or Ag；
The oxide of metal selected from Pt, Ru, Ir, Au, Pd or Ag；The mixing of this metal and/or metal oxide
Thing；Or carbon, selected from carbon black, graphite, CNT, carbon fiber, activated carbon and their mixture.
The additive for electrode part can for example exist with 0.1 to 15% amount.When it is present, one or more metals
The additive of oxidation can exist with 0.05 to 10% amount.
Embodiment 1：
By 400mg Cabot Corp Vulcan XC-72 activated carbons, 250mL chloroplatinic acids are distributed to, stirring is lower to add boron
Sodium hydride 100mg, the concentration for making sodium borohydride in deionized water is 10mg/mL.Temperature of reaction system is controlled in room temperature.Solution
PH value adjusts the scope to 10~11 by ammoniacal liquor.Finally, product is centrifuged, washed, vacuum drying 4h is that sensitive material is made.
Average grain diameter is 20nm.
Embodiment 2：
It is distributed in 250mL chlorination ruthenium solutions, 400mg Cabot Corp Vulcan XC-72 activated carbons under stirring
Sodium borohydride 100mg is added, the concentration for making sodium borohydride in deionized water is 10mg/mL.Temperature of reaction system is controlled in room temperature.
The pH value of solution adjusts the scope to 10~11 by ammoniacal liquor.Finally, product is centrifuged, washed, be dried in vacuo 4h, powder mull
Uniformly, it is placed on surface plate, is placed in Muffle furnace, 300 degree is calcined 12 hours.The ruthenium-oxide of load is made.Will be above-mentioned
Material grinding distribution to sensitive material.250mL chloroplatinic acids are distributed to, stirring is lower to add sodium borohydride 100mg, makes deionized water
The concentration of middle sodium borohydride is 10mg/mL.Temperature of reaction system is controlled in room temperature.The pH value of solution adjusted to 10 by ammoniacal liquor~
11 scope.Finally, product is centrifuged, washed, vacuum drying 4h is that sensitive material is made.
Embodiment 3：
400mg multiple-wall carbon nanotube is distributed in 250mL chlorination ruthenium solutions, stirring is lower to add sodium borohydride
250mg, the concentration for making sodium borohydride in deionized water is 25mg/mL.Temperature of reaction system is controlled in room temperature.The pH value of solution is led to
Ammoniacal liquor regulation is crossed to 10~11 scope.Finally, product is centrifuged, washed, be dried in vacuo 4h, powder mull is uniform, is placed into
On surface plate, it is placed in Muffle furnace, 300 degree are calcined 12 hours.The ruthenium-oxide of load is made.By above-mentioned material grinding point
It is scattered to sensitive material.250mL chloroplatinic acids are distributed to, stirring is lower to add sodium borohydride 100mg,
The concentration for making sodium borohydride in deionized water is 10mg/mL.Temperature of reaction system is controlled in room temperature.The pH value of solution
Scope to 10~11 is adjusted by ammoniacal liquor.Finally, product is centrifuged, washed, vacuum drying 4h is that sensitive material is made.
A kind of sensitive material of preparation method acquisition for electrochemical oxygen sensor sensitive material of the present invention can be
Pt, Ru, Ir, Au, Pd or Ag metal, or the metal selected from Pt, Ru, Ir, Au, Pd or Ag oxide, and this gold
The mixture of category or metal oxide.Sensitive material be by active metal and its oxide addition selectivity be dispersed in
On the surface of carbon-based material, what is obtained is the catalyst of carbon-based material load.It is characterized in that reducing the carrying capacity of noble metal.
Claims (4)
1. a kind of application of electrochemical oxygen sensor sensitive material, it is characterized in that：It is quick that one kind is used for electrochemical oxygen sensor
Materials application is felt in oxygen sensor, and it is quick that the sensitive material includes one or more kinds of noble metals being supported in conductive carbon
Feel the additive addition part of material, inorganic additive and one or more kinds of metal oxides；The oxygen sensor
The electrode contacted including two or more with acidic electrolysis bath.
2. a kind of application of electrochemical oxygen sensor sensitive material according to claim 1, it is characterized in that：The electrode
Including metal platinum Pt, ruthenium Ru, iridium Ir, gold Au, palladium Pd or silver Ag, selected from platinum Pt, ruthenium Ru, iridium Ir, gold Au, palladium Pd or silver Ag
Metal oxide, and the metal and metal oxide mixture, or carbon black, graphite, CNT, carbon fiber, activity
Charcoal and their mixture.
3. a kind of application of electrochemical oxygen sensor sensitive material according to claim 1, it is characterized in that：The electrode
The content of the additive of middle sensitive material is 10%~15%.
4. a kind of application of electrochemical oxygen sensor sensitive material according to claim 1, it is characterized in that：Described one kind
Or the content of the additive addition part of more than one metal oxides is 5%~10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710575753.9A CN107290408A (en) | 2015-09-22 | 2015-09-22 | A kind of application of electrochemical oxygen sensor sensitive material |
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| CN201510609442.0A CN105158312A (en) | 2015-09-22 | 2015-09-22 | Preparation and application of electrochemical oxygen sensor sensitive material |
| CN201710575753.9A CN107290408A (en) | 2015-09-22 | 2015-09-22 | A kind of application of electrochemical oxygen sensor sensitive material |
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| CN201510609442.0A Division CN105158312A (en) | 2015-09-22 | 2015-09-22 | Preparation and application of electrochemical oxygen sensor sensitive material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507246A (en) * | 2018-11-26 | 2019-03-22 | 江苏威尔安智能科技有限公司 | Oxygen content detector |
| CN114994132A (en) * | 2022-08-01 | 2022-09-02 | 成都工业学院 | Method for testing regulation and control of Rh-N4-graphene hydrogen evolution performance by stress |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008630A (en) * | 2006-01-23 | 2007-08-01 | 株式会社电装 | Gas sensing member used for gas sensor and method of manufacturing the member |
| CN102353702A (en) * | 2011-07-22 | 2012-02-15 | 李学中 | Oxide semiconductor normal temperature oxygen sensor |
| CN102507699A (en) * | 2011-10-18 | 2012-06-20 | 郑州炜盛电子科技有限公司 | Normal-temperature electrochemical oxygen sensor and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116817B (en) * | 2007-05-10 | 2011-04-06 | 南京大学 | Method for preparing carbon nitride nanotubes load platinum ruthenium nanometer particle electrode catalyst |
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2015
- 2015-09-22 CN CN201510609442.0A patent/CN105158312A/en active Pending
- 2015-09-22 CN CN201710575753.9A patent/CN107290408A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008630A (en) * | 2006-01-23 | 2007-08-01 | 株式会社电装 | Gas sensing member used for gas sensor and method of manufacturing the member |
| CN102353702A (en) * | 2011-07-22 | 2012-02-15 | 李学中 | Oxide semiconductor normal temperature oxygen sensor |
| CN102507699A (en) * | 2011-10-18 | 2012-06-20 | 郑州炜盛电子科技有限公司 | Normal-temperature electrochemical oxygen sensor and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507246A (en) * | 2018-11-26 | 2019-03-22 | 江苏威尔安智能科技有限公司 | Oxygen content detector |
| CN114994132A (en) * | 2022-08-01 | 2022-09-02 | 成都工业学院 | Method for testing regulation and control of Rh-N4-graphene hydrogen evolution performance by stress |
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| CN105158312A (en) | 2015-12-16 |
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