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M1 + M2/C catalyst and its preparation method

A catalyst, C1-C3 technology, used in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. The effect of catalytic activity, high activity, and simple and easy preparation process

Active Publication Date: 2014-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrolyte in the preparation process needs to contain Pb salt, and the process of electrodeposition is required at the same time. The preparation process is cumbersome and the process is complicated, so the experimental conditions still need to be further optimized and improved.

Method used

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  • M1 + M2/C catalyst and its preparation method
  • M1 + M2/C catalyst and its preparation method
  • M1 + M2/C catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: 1.9%Pb+20%Pt / C (1.9% means that the mass content of active component Pb is 1.9%, 20% means that the mass content of active component Pt is 20%, C means Vulcan XC- 72)

[0035] First, 100 mg of 20% Pt / C was ultrasonically dispersed in 20 mL of high-purity water, and then 20 mL of Pb(CH 3 COO) 2 In aqueous solution, dispersed evenly. The above solution was soaked and stirred at room temperature for 4 h, filtered, washed with 80 mL of water, and then dried in an air atmosphere at 90° C. to remove the solvent to obtain a black powder. The above black powder was ground and weighed, and the target product was 1.9%Pb+20%Pt / C electrocatalyst.

Embodiment 2

[0036] Example 2: 3.8%Pb+20%Pt / C-t (3.8% means that the mass content of active component Pb is 3.8%, 20% means that the mass content of active component Pt is 20%, C-t means Vulcan XC- 72 with 5MHNO 3 The solution was refluxed at 110°C for 6h and then washed and dried to obtain the carrier)

[0037] First, 80 mg of 20% Pt / C-t was ultrasonically dispersed in 16 mL of high-purity water, and then 16 mL of Pb(CH 3 COO) 2 In aqueous solution, dispersed evenly. The above solution was immersed and stirred at room temperature for 4 h, filtered, washed with 62 mL of water, and then dried in an air atmosphere at 90° C. to remove the solvent to obtain a black powder. The above black powder was ground and weighed, and the target product was 3.8%Pb+20%Pt / C-t electrocatalyst.

Embodiment 3

[0038] Example 3: 3.7%Pb+20%Pt / C-t (3.7% means that the mass content of active component Pb is 3.8%, 20% means that the mass content of active component Pt is 20%, C-t means Vulcan XC- 72 with 5MHNO 3 The solution was refluxed at 110°C for 6h and then washed and dried to obtain the carrier)

[0039] First, 161 mg of 20% Pt / C-t was ultrasonically dispersed in 32 mL of high-purity water, and then 32 mL of Pb(CH 3 COO) 2 In aqueous solution, dispersed evenly. The above solution was immersed and stirred at room temperature for 4 h, filtered, washed with 128 mL of water, and then dried in an air atmosphere at 90° C. to remove the solvent to obtain a black powder. The above black powder was ground and weighed, and the target product was 3.7%Pb+20%Pt / C-t electrocatalyst.

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PUM

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Abstract

The invention discloses a M1+M2 / C catalyst; M1 is any one of Pb, Bi, Sn and Ru, M2 / C is any one of Pt / C, Pd / C and Au / C, the M2 / C comprises, by mass, 0.5-85% of M2, and the M1+M2 / C catalyst comprises, by mass, 1-30% of M1. The catalyst is prepared by impregnation method, and the preparation comprises three steps of (1) M2 / C dispersion solution preparation, (2) M1 salt impregnation solution preparation and (3) M1+M2 / C catalyst preparation. In the preparation process of the catalyst, a protective agent is not needed to add to control the particle size of the catalyst, the catalytic activity of an alkaline medium on small molecule alcohol oxidation is high, the stability is good, the preparation process is simple, the production can be enlarged, and the catalyst can be used as an electrochemical oxidation catalyst of small molecule alcohol in the alkaline medium, and is especially suitable for using as an oxidation catalyst of a small molecule alcohol fuel in an alkaline direct alcohol fuel cell.

Description

technical field [0001] The invention relates to a small molecule alcohol oxidation catalyst in an alkaline medium, in particular to a preparation method for a small molecule alcohol fuel oxidation catalyst used in an alkaline fuel cell. Background technique [0002] Direct alcohol fuel cells have attracted widespread attention due to their high energy conversion efficiency, environmental friendliness, and sustainable power generation. However, the current commercialization of fuel cells still faces certain challenges, one of which is the slow kinetics of the anode alcohol fuel oxidation process. At present, the most commonly used catalyst for alcohol fuel cells is Pt / C. Although it has high catalytic activity, the intermediate product CO of alcohol oxidation ads There is a strong adsorption between the carbon dioxide and Pt, which will cause the active site to be occupied and cause catalyst poisoning, which will reduce the catalytic activity and stability. Therefore, the de...

Claims

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Application Information

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IPC IPC(8): H01M4/92B01J23/44B01J23/68B01J23/62B01J23/46
CPCB01J23/42B01J23/44B01J23/462B01J23/628B01J23/68H01M4/921H01M8/083Y02E60/50
Inventor 孙公权李光兰姜鲁华王素力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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