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Double-layer composite water electrolysis anode catalyst and preparation method thereof

A double-layer composite, electrolyzed water technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high price and difficult practical application, and achieve simple preparation methods and long-term stability. , the effect of large hollow volume

Active Publication Date: 2020-06-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although noble metal catalysts have high activity, they are expensive and difficult to be practically applied

Method used

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  • Double-layer composite water electrolysis anode catalyst and preparation method thereof
  • Double-layer composite water electrolysis anode catalyst and preparation method thereof
  • Double-layer composite water electrolysis anode catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for preparing a double-layer composite electrolytic water anode catalyst, comprising the following steps:

[0037] (01) Weigh 0.15g of cobalt(II) acetate tetrahydrate and 0.147g of trisodium citrate dihydrate and dissolve them in 40mL of deionized water with magnetic stirring for 2min to form solution A. In addition, 0.132 g of potassium hexacyanoferrate (III) was weighed and dissolved in 60 mL of deionized water and magnetically stirred for 2 min to form solution B. Under magnetic stirring, solution B was uniformly added to solution A within 15s, and the stirring was continued for 1min, and then the resulting mixture was transferred and aged at 80°C for 6h. Finally, the samples were collected by centrifugation, washed by deionized water and ethanol, and dried overnight at 70 °C to obtain Prussian blue-like nanomaterials.

[0038] (02) Weigh 0.5 g of CTAB and dissolve it in 20 mL of deionized water with magnetic stirring for 2 min to obtain an aqueous CTAB sol...

Embodiment 2

[0044] A method for preparing a double-layer composite electrolytic water anode catalyst, comprising the following steps:

[0045] (01) Weigh 0.15g of cobalt(II) acetate tetrahydrate and 0.147g of trisodium citrate dihydrate and dissolve them in 40mL of deionized water with magnetic stirring for 2min to form solution A. In addition, 0.132 g of potassium hexacyanoferrate (III) was weighed and dissolved in 60 mL of deionized water and magnetically stirred for 2 min to form solution B. Under magnetic stirring, solution B was uniformly added to solution A within 15s, and the stirring was continued for 1min, and then the resulting mixture was transferred and aged at 80°C for 6h. Finally, the samples were collected by centrifugation, washed by deionized water and ethanol, and dried overnight at 70 °C to obtain Prussian blue-like nanomaterials.

[0046] (02) Weigh 0.5 g of CTAB and dissolve it in 20 mL of deionized water with magnetic stirring for 2 min to obtain an aqueous CTAB sol...

Embodiment 3

[0052] A method for preparing a double-layer composite electrolytic water anode catalyst, comprising the following steps:

[0053] (01) Weigh 0.15g of cobalt(II) acetate tetrahydrate and 0.147g of trisodium citrate dihydrate and dissolve them in 40mL of deionized water with magnetic stirring for 2min to form solution A. In addition, 0.132 g of potassium hexacyanoferrate (III) was weighed and dissolved in 60 mL of deionized water and magnetically stirred for 2 min to form solution B. Under magnetic stirring, solution B was uniformly added to solution A within 15s, and the stirring was continued for 1min, and then the resulting mixture was transferred and aged at 80°C for 6h. Finally, the samples were collected by centrifugation, washed with deionized water and ethanol, and dried overnight at 70°C to obtain Prussian blue-like nanomaterials.

[0054] (02) Weigh 0.5 g of CTAB and dissolve it in 20 mL of deionized water with magnetic stirring for 2 min to obtain an aqueous CTAB so...

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Abstract

The invention belongs to the technical field of functional material preparation and electrocatalysis, and provides a double-layer composite water electrolysis anode catalyst and a preparation method thereof. The catalyst is a double-layer composite catalyst, wherein an inner-layer catalyst is a cobalt-based catalyst generated after high-temperature carbonization of ferrocobalt Prussian blue, an outer-layer catalyst is a nickel-based catalyst, and a mesoporous fibrous silicon dioxide and mesoporous mulberry-shaped carbon shell layer with high specific surface area is arranged between the inner-layer catalyst and the outer-layer catalyst. The surface area of the carbon layer reaches 285-325 m<2> / g, so that sufficient dispersion and stable existence of the internal and external catalysts arefacilitated. The preparation method comprises the following steps: preparing the mesoporous silica shell layer by adopting a double-liquid-phase method, preparing a mulberry-shaped carbon layer precursor by adopting a water-phase synthesis method, carbonizing at high temperature in an inert atmosphere, and loading a nickel-based catalyst. The catalyst prepared in the method has the advantages of large hollow volume, high specific surface area, unique double-layer catalyst structure, high-efficiency water electrolysis catalytic activity and good catalytic stability.

Description

technical field [0001] The invention belongs to the technical field of functional material preparation and electrocatalysis, and in particular relates to a catalyst for electrolyzing water anode and a preparation method thereof. Background technique [0002] Traditional fossil energy is increasingly scarce with extensive use and will cause serious environmental pollution. Therefore, it is necessary to accelerate the development of green, safe and recyclable new clean energy. As a new energy source, hydrogen energy is abundant and renewable, and its combustion product is water, which is one of the most environmentally friendly energy sources. Electrolysis of water can convert electrical energy into hydrogen energy. However, the activation energy of the electrolysis reaction is relatively large, and a highly active electrocatalyst is required to promote the reaction. Although noble metal catalysts have high activity, they are expensive and difficult to be practically applied....

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/78B01J35/02B01J35/10B01J37/02B01J37/08B01J37/10B01J37/16C25B1/04C25B11/06
CPCB01J27/24B01J23/78B01J37/10B01J37/084B01J37/0201B01J37/16C25B1/04C25B11/091B01J35/33B01J35/40B01J35/61Y02P20/133
Inventor 张秀红沈伟林齐骥李政王栋权志杰易昭晖
Owner DALIAN UNIV OF TECH
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