Method for preparing platinum black/ platinum ruthenium black nano electro-catalyst by using sacrificial magnesia carrier

An electrocatalyst, magnesium oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve problems such as easy agglomeration and difficult preparation

Active Publication Date: 2012-11-28
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially for platinum black / platinum ruthenium black nano-electrocatalysts, due to the strong affinity between metal nanoparticles, it is easy to agglomerate and difficult to prepare

Method used

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  • Method for preparing platinum black/ platinum ruthenium black nano electro-catalyst by using sacrificial magnesia carrier
  • Method for preparing platinum black/ platinum ruthenium black nano electro-catalyst by using sacrificial magnesia carrier
  • Method for preparing platinum black/ platinum ruthenium black nano electro-catalyst by using sacrificial magnesia carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation of platinum black nano electrocatalyst

[0036] 1. Weigh 3.2g of Na 2 PtCl 6 ·6H 2 O (31.3% metallic platinum content) and 3.4 g of CH 3 COONa was added into 150ml of methanol, and the pH value of the solution was controlled to be 7.5-8.5. First pass high-purity nitrogen gas for 15 minutes to remove the air in the solution, then react at 50°C in a carbon monoxide atmosphere for 20 minutes, and then react at room temperature and in a carbon monoxide atmosphere to obtain a blue-green metal carbonyl cluster solution (Component A).

[0037] 2. Add 4 g of magnesium oxide to the obtained component A under nitrogen protection, and stir at 55°C for 6 hours, then remove methanol (component B) in a nitrogen atmosphere at 70°C.

[0038] 3. Treat component (B) at 50°C for 6 hours in a mixed atmosphere of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen is 1:9), then wash with water and dry to obtain component (C).

[0039]4. Add 1...

Embodiment 2

[0051] Embodiment 2: the preparation of platinum ruthenium black nano electrocatalyst

[0052] 1. Weigh 0.38g of Na 2 PtCl 6 ·6H 2 O (metallic platinum content 31.3%), 0.14g of RuCl 3 and 0.45 g of CH 3 COONa was added to 50ml of methanol, and the pH value of the solution was controlled to be 7.5-8.5. First pass high-purity nitrogen for 15 minutes to remove the air in the solution, then react at 50°C in a carbon monoxide atmosphere for 20 minutes, then react at room temperature and in a carbon monoxide atmosphere to obtain a blue-green metal carbonyl cluster solution ( Component F).

[0053] 2. Add 0.5 g of magnesium oxide to the obtained component F under the protection of nitrogen, and stir at 55°C for 6 hours, then remove the methanol (component G) in a nitrogen atmosphere at 70°C.

[0054] 3. Treat the component (G) at 200°C for 2 hours in a hydrogen / nitrogen mixed atmosphere (the volume ratio of hydrogen and nitrogen is 1:9), then wash with water and dry to obtain t...

Embodiment ）

[0061] (1) Anode support layer: TGPH060, 20wt.% water proofing (from Toray company); anode microporous layer: Vulcan XC-72R (1mg cm -2 ) (from Cabot Company) and 20wt.%PTFE (from Dupont Company); anode catalyst layer (this embodiment): Pt-Ru / C (3.0mgcm -2 ) and Pt-Ru black (3.0mgcm -2 ) (LJY-2), 20wt.%Nafion (from Dupont);

[0062] or anode catalyst layer (existing technology): Pt-Ru / C (3.0mgcm -2 ) and Pt-Ru black (3.0mgcm -2 ) (JM), 20wt.%Nafion (from Dupont).

[0063] (2) Cathode supporting layer: TGPH060, 20wt.%; Cathode microporous layer: XC-72R (2mg·cm -2 ) and 25wt.%PTFE; cathode catalyst layer: Pt / C (3.0mg·cm -2 ) and Pt black (JM) (3.0mg cm -2 ), 15wt.%Nafion

[0064] (3) Nafion115 membrane (from Dupont).

[0065] The Pt-Ru / C and Pt-Ru black in the above-mentioned anode catalytic layer are all from Johnson Matthey Company (abbreviated as JM); the Pt / C in the above-mentioned cathode catalytic layer are all from Johnson Matthey Company (abbreviated as JM).

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Abstract

The invention provides a method for preparing a platinum black/ platinum ruthenium black nano electro-catalyst by using a sacrificial magnesia carrier. The method is used for preparing the platinum black/ platinum ruthenium black nano electro-catalyst based on a metallic carbonyl cluster path, and comprises the steps of synthesis of a catalyst precursor, namely a metallic carbonyl cluster, injection of magnesia, heat treatment of an intermediate of the catalyst, dissolution of the magnesia and post treatment of the catalyst. The method specifically comprises the following steps of: introducing CO under an alkali condition to react with the precursor of the electro-catalyst to obtain the metallic carbonyl cluster, adding the magnesia in a protective atmosphere, stirring, and transferring the solvent at the temperature of between 30 and 120 DEG C in the protective atmosphere; performing heat treatment; and adding an acid solution to dissolve the magnesia, heating, performing post treatment, and thus obtaining the platinum black/ platinum ruthenium black nano electro-catalyst with the particle diameter of 2 to 20 nanometers and narrow particle size distribution. The electro-catalyst is suitable for a cathode and an anode of a proton-exchange membrane fuel cell.

Description

technical field [0001] The invention relates to a method for preparing a platinum black / platinum ruthenium black nanometer electrocatalyst for a proton exchange membrane fuel cell, and belongs to the technical fields related to energy and catalysts. Background technique [0002] Due to the advantages of high energy density, high energy conversion efficiency, low pollution, and low operating temperature, proton exchange membrane fuel cells have become a research hotspot in the field of new energy. At present, in order to reduce the dependence of automobiles on gasoline, countries have invested in the research and development of new energy vehicle batteries. Among them, hydrogen fuel cell vehicles that use hydrogen as fuel and truly achieve zero emissions are recognized as the best solution to today's transportation energy and environmental problems. One of them is the key to tackling key problems for car companies in various countries. At the just-concluded 2010 Shanghai Wor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/46H01M4/92B82Y30/00
CPCY02E60/50
Inventor 杨辉刘娟英
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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