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Application of a Catalyst in Alkaline Fuel Cell

A technology of fuel cells and catalysts, applied in physical/chemical process catalysts, battery electrodes, circuits, etc., to achieve good application effects, small particles, and uniform particle size distribution

Inactive Publication Date: 2011-12-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the currently published literature and patents, most of the alkaline fuel cell catalysts use transition metal oxides and hydrogen storage alloys as active components, but no catalysts with transition metal-nitrogen complexes as the main active components have been seen. to report

Method used

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  • Application of a Catalyst in Alkaline Fuel Cell
  • Application of a Catalyst in Alkaline Fuel Cell
  • Application of a Catalyst in Alkaline Fuel Cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation and activity test of 29% Co-N / C catalyst:

[0030] Add 2.0mL of cobalt nitrate hexahydrate ethanol solution with a concentration of 10mgCo / mL and 80mg of imidazole into 50mL of ethanol, ultrasonically stir until uniform, and obtain mixed solution A; add 0.1g of XC-72 carbon powder into 50mL of ethanol, ultrasonically Mix evenly to obtain slurry B; mix the above slurry A with solution B, evaporate ethanol to dryness under stirring condition at 60°C, after drying, pass through N 2 , heat-treated at 600° C. for 2 hours, and cooled to room temperature to obtain a Co-N / C catalyst with an active component content of 29% and a N:Co molar ratio of 4.4:1.

[0031] Electrochemical oxygen reduction (ORR) polarization curve tests were carried out on the catalyst prepared above and the commercial Pt / C comparison catalyst respectively, and the test conditions were as follows:

[0032] Cyclic voltammetry (CV) tests were performed on a CHI 600 electrochemical tester and a ...

Embodiment 2

[0038] Preparation and activity test of 10% Fe-N / C catalyst:

[0039] Add 1.33mL of ferrous chloride dihydrate isopropanol solution with a concentration of 5mgFe / mL and 55.2mg of hexamethylenediamine into 40mL of isopropanol, ultrasonically stir until uniform to obtain mixed solution A; mix 0.18g XC- Add 72 carbon powder into 60mL isopropanol, and mix evenly by ultrasonic to obtain slurry B; mix the above slurry A with solution B, and evaporate the isopropanol to dryness under stirring at 75°C. After drying, pass in NH 3 , heat-treated at 300°C for 1 hour, and cooled to room temperature to obtain an Fe-N / C catalyst with an active component content of 10% and a N:Fe molar ratio of 8:1.

[0040] Electrochemical oxygen reduction (ORR) polarization curve tests were carried out on the catalyst prepared above and the commercial Pt / C comparison catalyst respectively, and the test conditions were as follows:

[0041] Cyclic voltammetry (CV) tests were performed on a CHI 600 electroch...

Embodiment 3

[0047] Preparation and activity test of 80% Ni-N / C catalyst:

[0048] Add 5.93mL of ethanol solution of nickel oxalate dihydrate with a concentration of 8mgNi / mL and 747.7mg of aniline into 80mL of ethanol, ultrasonically stir until uniform, and obtain mixed solution A; add 0.04g of BP2000 carbon powder into 20mL of ethanol, and ultrasonically mix uniform to obtain slurry B; mix the above slurry A with solution B, evaporate ethanol to dryness at 60°C under stirring condition, after drying, pass through N 2 , heat-treated at 750°C for 2.5 hours, and cooled to room temperature to obtain a Ni-N / C catalyst with an active component content of 80% and a N:Ni molar ratio of 10:1.

[0049] Electrochemical oxygen reduction (ORR) polarization curve tests were carried out on the catalyst prepared above and the commercial Pt / C comparison catalyst respectively, and the test conditions were as follows:

[0050] Cyclic voltammetry (CV) tests were performed on a CHI 600 electrochemical teste...

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Abstract

The present invention relates to alkaline fuel cell catalysts, specifically the application of a highly active catalyst in alkaline fuel cells; the active component of the catalyst is composed of N and metal components, and the metal components are Fe, One or more of Co, Ni, Ti, V, Cr, Mn, Cu, Zn, Zr, Nb, Mo, Cd, W, Sn, Pb, Pd, Ir, Ru, W and their oxides; The atomic ratio of N and other metal components in the catalyst is 20:1-0.1:10, the mass percentage of active components in the catalyst is 10-80%, and the balance is C carrier. The catalyst of the invention has small particles and uniform particle size distribution. Compared with Pt, the catalyst has the advantages of low price and rich resources, and its activity in an alkaline system is equivalent to that of Pt, thereby greatly reducing the catalyst cost.

Description

technical field [0001] The invention relates to the field of alkaline fuel cells, in particular to a highly dispersed and highly active alkaline fuel cell electrode catalyst. Background technique [0002] A fuel cell is an electrochemical power generation device, which directly converts chemical energy into electrical energy isothermally and electrochemically without going through a heat engine process, and is not limited by the Carnot cycle, and has high energy conversion efficiency. At the same time, it is an environmentally friendly energy conversion device that hardly emits nitrogen and sulfur oxides. [0003] As a kind of fuel cell, proton exchange membrane fuel cell not only has the general characteristics of fuel cell, but also has outstanding characteristics such as rapid start-up at room temperature, high specific power and specific energy, and has been regarded as electric vehicles, submarines and various fuel cells. The best candidate for mobile power has become ...

Claims

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Application Information

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IPC IPC(8): H01M4/90B01J27/24
CPCY02E60/50
Inventor 张华民马原蔚钟和香金虹徐婷
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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