CN114870838A - Hydrogen sensor catalyst, preparation method thereof and hydrogen sensor - Google Patents
Hydrogen sensor catalyst, preparation method thereof and hydrogen sensor Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 74
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 74
- 239000003054 catalyst Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title claims 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002253 acid Substances 0.000 claims abstract description 17
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 12
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 10
- 229910052741 iridium Inorganic materials 0.000 claims abstract description 9
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 7
- 229910052768 actinide Inorganic materials 0.000 claims abstract description 6
- 150000001255 actinides Chemical class 0.000 claims abstract description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 229910052762 osmium Inorganic materials 0.000 claims abstract description 3
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 3
- 239000010948 rhodium Substances 0.000 claims abstract description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 229910002005 actinide nitrate Inorganic materials 0.000 claims 1
- 150000002431 hydrogen Chemical class 0.000 abstract description 54
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000005543 nano-size silicon particle Substances 0.000 abstract description 2
- 229910052814 silicon oxide Inorganic materials 0.000 abstract description 2
- 150000007513 acids Chemical class 0.000 abstract 1
- 229910052747 lanthanoid Inorganic materials 0.000 abstract 1
- 150000002602 lanthanoids Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 8
- 229910052776 Thorium Inorganic materials 0.000 description 8
- YWECOPREQNXXBZ-UHFFFAOYSA-N praseodymium(3+);trinitrate Chemical compound [Pr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YWECOPREQNXXBZ-UHFFFAOYSA-N 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- VGBPIHVLVSGJGR-UHFFFAOYSA-N thorium(4+);tetranitrate Chemical group [Th+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VGBPIHVLVSGJGR-UHFFFAOYSA-N 0.000 description 8
- 238000007084 catalytic combustion reaction Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- DANYXEHCMQHDNX-UHFFFAOYSA-K trichloroiridium Chemical compound Cl[Ir](Cl)Cl DANYXEHCMQHDNX-UHFFFAOYSA-K 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 2
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/48—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing arsenic, antimony, bismuth, vanadium, niobium tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
Abstract
The invention relates to a hydrogen sensor catalyst, a preparation method thereof and a hydrogen sensor 2 O 3 One of ZSM-5 or nano silicon oxide, and the carrier is modified by using the nitrate of lanthanide and actinide; the active component is one or more of salts or acids of ruthenium, rhodium, palladium, osmium, iridium or platinum, and the catalyst enables the hydrogen sensor to have almost no response to methane, has obvious response to hydrogen and has high selectivity to hydrogen.
Description
Technical Field
The invention belongs to the technical field of gas measurement sensors, and particularly relates to a hydrogen sensor catalyst, a preparation method thereof and a hydrogen sensor.
Background
A catalytic combustion type gas sensor is a sensor for detecting combustible gas. The catalytic combustion gas sensor consists of a small sphere of about 1mm in size, made up of a platinum wire coil wrapped with a catalyst. During normal work, the platinum silk circular telegram heats the bobble to certain operating temperature, and when combustible gas exists, the oxidation reaction can take place on the catalyst for the combustible gas body, and the heat that the oxidation reaction produced can heat the platinum silk to change the resistance value of platinum silk, and then realize surveying combustible gas's function. The main component of the catalyst is alumina supported noble metal material.
Hydrogen is a combustible gas and therefore can be detected using this type of gas sensor, but current catalytic combustion gas sensors cannot distinguish whether the gas being measured is methane or hydrogen, i.e., current catalytic combustion gas sensors cannot achieve high selectivity for hydrogen.
Disclosure of Invention
The invention aims to provide a hydrogen sensor catalyst to improve the sensitivity of hydrogen detection.
Another object of the present invention is to provide a method for preparing a hydrogen sensor catalyst.
It is a third object of the present invention to provide a hydrogen sensor
In order to achieve the above purpose, the invention adopts the technical scheme that:
a hydrogen sensor catalyst comprises a carrier and an active component, wherein the carrier is one of gamma-Al 2O3, ZSM-5 or nano silicon oxide, and the carrier is modified by using nitrate of actinide elements; the active component is palladium, platinum and one of ruthenium, rhodium, osmium and iridium.
Preferably, the active ingredient accounts for 4-5.5% of the mass of the carrier.
Preferably, the nitrate of the actinide accounts for 1.8-2.5% of the mass of the carrier.
The preparation method of the hydrogen sensor catalyst comprises the following steps:
1) dissolving nitrate of actinide elements in water to prepare a nitrate solution, then mixing the nitrate solution and the carrier uniformly, standing for 24-72 h, drying, then baking, and obtaining a modified carrier after baking is finished;
2) preparing active solution from salt or acid of the active component and solution water, mixing the active solution and the modified carrier, uniformly stirring, standing for 24-72 h, drying, baking, and finishing baking.
Preferably, the mass concentration of the nitrate aqueous solution is 6-8.3 g.L -1 。
Preferably, the active solution is a mixture of aqueous solutions of ammonium chloropalladate, chloroplatinic acid and iridium chloride, and the mass concentrations of the ammonium chloropalladate, the chloroplatinic acid and the iridium chloride are respectively 5-13.3 g.L -1 、100～130g.L -1 、5～26.7g.L -1 。
Preferably, the drying in the step 1) is carried out for 24-72 hours at the temperature of 100-200 ℃, and the baking is carried out for 2-6 hours at the temperature of 400-800 ℃.
Preferably, the drying in the step 2) is carried out for 24-72 hours at the temperature of 100-200 ℃, and the baking is carried out for 2-6 hours at the temperature of 400-800 ℃.
A hydrogen sensor comprising the hydrogen sensor catalyst.
The invention has the beneficial effects that:
according to the hydrogen sensor, the active component and the carrier are mixed to prepare the catalyst, so that the catalyst has almost no response to methane, has obvious response to hydrogen, and is high in selectivity of the hydrogen sensor to hydrogen.
Drawings
FIG. 1 shows the response of a commercially available catalytic combustion gas sensor and a hydrogen sensor of example 1 to hydrogen;
FIG. 2 shows the results of the response of a commercially available catalytic combustion gas sensor and the hydrogen sensor of example 1 to methane.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
Example 1
The hydrogen sensor catalyst comprises a carrier and an active component, wherein the carrier is gamma-Al 2 O 3 The support was modified with thorium nitrate. The active component is a mixture of ammonium chloropalladate, chloroplatinic acid and iridium chlorideThe atomic ratio of palladium, platinum and iridium was 1:7:2, and the total supporting amount was 20%.
The preparation method of the hydrogen sensor catalyst of the embodiment includes the following steps:
1) weighing 0.25g of thorium nitrate and dissolving in 30mL of water to obtain a thorium nitrate solution.
2) 10g of commercially available gamma-Al was weighed 2 O 3 And put into a beaker.
3) Pouring the thorium nitrate solution obtained in the step 1) into the gamma-Al weighed in the step 2) 2 O 3 Uniformly stirring, standing for 24h at 25 ℃, drying in a 100 ℃ oven for 24h, roasting in a muffle furnace at the temperature rise rate of 5 ℃/min from room temperature to 500 ℃, and continuously roasting at 500 ℃ for 4h to obtain thorium-modified gamma-Al 2 O 3 。
4) 0.4g of ammonium chloropalladate, 3.9g of chloroplatinic acid and 0.8g of iridium chloride are weighed and dissolved in 30mL of water to obtain an active component solution.
5) Weighing 10g of thorium modified gamma-Al obtained in the step 3) 2 O 3 And put into a beaker.
6) Pouring the active component solution obtained in the step 4) into the thorium modified gamma-Al weighed in the step 5) 2 O 3 And uniformly stirring, standing for 24h at 25 ℃, drying in a 100 ℃ oven for 24h, roasting in a muffle furnace at the temperature rise rate of 5 ℃/min, raising the temperature from room temperature to 500 ℃, and continuously roasting at 500 ℃ for 4h to obtain the hydrogen sensor catalyst.
The hydrogen sensor catalyst of the present example, that is, the hydrogen sensor catalyst prepared by the method of preparing the hydrogen sensor catalyst of the present example.
The hydrogen sensor of this example was obtained by mixing the hydrogen sensor catalyst of this example with deionized water to form a slurry and coating the slurry on the surface of a platinum wire.
Example 2
The hydrogen sensor catalyst comprises a carrier and an active component, wherein the carrier is gamma-Al 2 O 3 The carrier is modified by praseodymium nitrate. The active component is a mixture of ammonium chloropalladate, chloroplatinic acid and iridium chlorideThe atomic ratio of palladium, platinum and ruthenium was 0.5:8:1.5, and the total supporting amount was 15%.
The preparation method of the hydrogen sensor catalyst of the embodiment includes the following steps:
1) 0.2g of praseodymium nitrate is weighed and dissolved in 30mL of water to obtain a praseodymium nitrate solution.
2) 10g of commercially available gamma-Al was weighed 2 O 3 And put into a beaker.
3) Pouring the praseodymium nitrate solution obtained in the step 1) into the gamma-Al weighed in the step 2) 2 O 3 Uniformly stirring, standing for 24h at 25 ℃, drying in an oven at 150 ℃ for 24h, roasting in a muffle furnace at a heating rate of 5 ℃/min from room temperature to 600 ℃, and continuously roasting at 600 ℃ for 4h to obtain thorium-modified gamma-Al 2 O 3 。
4) 0.12g of ammonium chloropalladate, 2.79g of chloroplatinic acid and 0.03g of ruthenium chloride are weighed and dissolved in 30mL of water to obtain an active component solution.
5) Weighing 10g of thorium modified gamma-Al obtained in the step 3) 2 O 3 And put into a beaker.
6) Pouring the active component solution obtained in the step 4) into the thorium modified gamma-Al weighed in the step 5) 2 O 3 And uniformly stirring, standing for 24h at 25 ℃, drying in a 100 ℃ oven for 24h, roasting in a muffle furnace at the temperature rise rate of 5 ℃/min from room temperature to 600 ℃, and continuously roasting at 600 ℃ for 4h to obtain the hydrogen sensor catalyst.
The hydrogen sensor catalyst of the present example, that is, the hydrogen sensor catalyst prepared by the method of preparing the hydrogen sensor catalyst of the present example.
The hydrogen sensor of this example was obtained by mixing the hydrogen sensor catalyst of this example with deionized water to form a slurry and coating the slurry on the surface of a platinum wire.
Example 3
The hydrogen sensor catalyst comprises a carrier and an active component, wherein the carrier is gamma-Al 2 O 3 The support was modified with thorium nitrate. The active components are mixture of ammonium chloropalladate, chloroplatinic acid and iridium chlorideThe atomic ratio of palladium, platinum and iridium was 1:7:0.5, and the total supporting amount was 16%.
The preparation method of the hydrogen sensor catalyst of the embodiment includes the following steps:
1) weighing 0.18g of thorium nitrate and dissolving in 30mL of water to obtain a thorium nitrate solution.
2) 10g of commercially available gamma-Al was weighed 2 O 3 And put into a beaker.
3) Pouring the thorium nitrate solution obtained in the step 1) into the gamma-Al weighed in the step 2) 2 O 3 Uniformly stirring, standing for 24h at 25 ℃, drying in a 100 ℃ oven for 48h, roasting in a muffle furnace at the temperature rise rate of 5 ℃/min from room temperature to 400 ℃, and continuously roasting at 400 ℃ for 2h to obtain thorium-modified gamma-Al 2 O 3 。
4) 0.3g of ammonium chloropalladate, 3.6g of chloroplatinic acid and 0.15g of iridium chloride are weighed and dissolved in 30mL of water to obtain an active component solution.
5) Weighing 10g of thorium modified gamma-Al obtained in the step 3) 2 O 3 And put into a beaker.
6) Pouring the active component solution obtained in the step 4) into the thorium modified gamma-Al weighed in the step 5) 2 O 3 And (3) uniformly stirring, standing for 24h at 25 ℃, then placing into a 100 ℃ oven for drying for 48h, then roasting in a muffle furnace at the heating rate of 5 ℃/min, heating from room temperature to 400 ℃, and then continuously roasting for 2h at 400 ℃ to obtain the hydrogen sensor catalyst.
The hydrogen sensor catalyst of the present example, that is, the hydrogen sensor catalyst prepared by the method of preparing the hydrogen sensor catalyst of the present example.
The hydrogen sensor of this example was obtained by mixing the hydrogen sensor catalyst of this example with deionized water to form a slurry and coating the slurry on the surface of a platinum wire.
Example 4
The hydrogen sensor catalyst comprises a carrier and an active component, wherein the carrier is gamma-Al 2 O 3 The carrier is modified by praseodymium nitrate. The active components are ammonium chloropalladate, chloroplatinic acid and iridium chlorideThe atomic ratio of palladium, platinum and ruthenium in the mixture was 1:7:3, and the total supporting amount was 18%.
The preparation method of the hydrogen sensor catalyst of the embodiment includes the following steps:
1) 0.2g of praseodymium nitrate is weighed and dissolved in 30mL of water to obtain a praseodymium nitrate solution.
2) 10g of commercially available gamma-Al was weighed 2 O 3 And put into a beaker.
3) Pouring the praseodymium nitrate solution obtained in the step 1) into the gamma-Al weighed in the step 2) 2 O 3 Uniformly stirring, standing for 24h at 25 ℃, drying for 72h in a 100 ℃ oven, roasting in a muffle furnace at the temperature rise rate of 5 ℃/min from room temperature to 800 ℃, and continuously roasting for 6h at 800 ℃ to obtain thorium-modified gamma-Al 2 O 3 。
4) 0.4g of ammonium chloropalladate, 3.6g of chloroplatinic acid and 0.6g of ruthenium chloride are weighed and dissolved in 30mL of water to obtain an active component solution.
5) Weighing 10g of thorium modified gamma-Al obtained in the step 3) 2 O 3 And put into a beaker.
6) Pouring the active component solution obtained in the step 4) into the thorium modified gamma-Al weighed in the step 5) 2 O 3 And uniformly stirring, standing for 24h at 25 ℃, drying in a 100 ℃ oven for 24h, roasting in a muffle furnace at the temperature rise rate of 5 ℃/min, raising the temperature from room temperature to 800 ℃, and continuously roasting at 800 ℃ for 6h to obtain the hydrogen sensor catalyst.
The hydrogen sensor catalyst of the present example, that is, the hydrogen sensor catalyst prepared by the method of preparing the hydrogen sensor catalyst of the present example.
The hydrogen sensor of this example was obtained by mixing the hydrogen sensor catalyst of this example with deionized water to form a slurry and coating the slurry on the surface of a platinum wire.
Examples of the experiments
The results of identifying hydrogen and methane using the hydrogen sensor of example 1 and a commercially available hydrogen sensor are shown in fig. 1 and 2, respectively.
Claims (9)
1. A kind ofThe hydrogen sensor catalyst comprises a carrier and an active component, and is characterized in that the carrier is gamma-Al 2 O 3 The carrier is modified by using nitrate of actinide elements; the active component is a mixture of palladium, platinum and an element A, wherein the element A is one of ruthenium, rhodium, osmium or iridium.
2. The hydrogen sensor catalyst according to claim 1, wherein the active component accounts for 4 to 5.5% by mass of the carrier.
3. The hydrogen sensor catalyst according to claim 1, wherein the actinide nitrate accounts for 1.8 to 2.5% by mass of the carrier.
4. The method for preparing a hydrogen sensor catalyst according to claim 1, comprising the steps of:
1) dissolving nitrate of actinide elements in water to prepare a nitrate solution, then mixing the nitrate solution and the carrier uniformly, standing for 24-72 h, drying, then baking, and obtaining a modified carrier after baking is finished;
2) preparing active solution from salt or acid of the active component and solution water, mixing the active solution and the modified carrier, uniformly stirring, standing for 24-72 h, drying, baking, and finishing baking.
5. The method for preparing the hydrogen sensor catalyst according to claim 4, wherein the mass concentration of the nitrate aqueous solution is 6 to 8.3g.L -1 。
6. The method for preparing the hydrogen sensor catalyst according to claim 4, wherein the active solution is a mixture of ammonium chloropalladate, chloroplatinic acid, a salt of the element A or an aqueous solution of acid, and the mass concentration of the ammonium chloropalladate, the chloroplatinic acid, the salt of the element A or the acid is 5-13.3 g.L -1 、100～130g.L -1 、5～26.7g.L -1 。
7. The preparation method of the hydrogen sensor catalyst according to claim 4, wherein the drying in the step 1) is performed at 100-200 ℃ for 24-72 h, and the baking is performed at 400-800 ℃ for 2-6 h.
8. The method for preparing the hydrogen sensor catalyst according to claim 4, wherein the drying in the step 2) is performed at 100-200 ℃ for 24-72 hours, and the baking is performed at 400-800 ℃ for 2-6 hours.
9. A hydrogen sensor comprising the hydrogen sensor catalyst according to claim 1.
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| JP2005321215A (en) * | 2004-05-06 | 2005-11-17 | Tokyo Gas Co Ltd | Catalytic combustion type gas sensor |
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| DE102007033113A1 (en) * | 2007-07-13 | 2009-01-15 | Bayer Technology Services Gmbh | Stable, high activity hydrogen chloride oxidation catalyst, for producing chlorine, comprises active component supported on carrier based on uranium compound |
| US20140072493A1 (en) * | 2011-03-04 | 2014-03-13 | Umicore Shokubai Usa Inc. | Catalyst for exhaust gas purification, method for producing the same, and exhaust gas purification method using the same |
| CN107413336A (en) * | 2011-03-04 | 2017-12-01 | 优美科触媒日本有限公司 | Exhaust gas purification catalyst, its preparation method and the exhaust gas purifying method using the catalyst |
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