Carbon-bearing platinum-iron alloy electrocatalyst for PEM electrolyte fuel cell and its preparing method

A technology of proton exchange membrane and electrocatalyst, which is applied in the direction of battery electrodes, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. It can solve the problems of slow discharge, battery energy loss, large polarization overpotential, etc. question

Inactive Publication Date: 2003-06-11
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the data, the reduction reaction of oxygen on the platinum electrode in acidic solution generally needs to go through a multi-step electron transfer intermediate process, resulting in slow discharge of oxygen on the electrode, resulting in a large polarization overpotential and causing energy loss of the battery.

Method used

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  • Carbon-bearing platinum-iron alloy electrocatalyst for PEM electrolyte fuel cell and its preparing method
  • Carbon-bearing platinum-iron alloy electrocatalyst for PEM electrolyte fuel cell and its preparing method
  • Carbon-bearing platinum-iron alloy electrocatalyst for PEM electrolyte fuel cell and its preparing method

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Embodiment 1

[0029] Boil Vulcan.XC-72 activated carbon carrier with concentrated nitric acid for 2 hours, wash with distilled water until neutral, filter, discard the filtrate, dry at 100°C, place in a tube furnace, and heat at 500°C for 1 hour under an inert atmosphere. Take 0.60 g of the carbon powder in a small beaker, add distilled water at a liquid-solid ratio of 1:40, and vibrate ultrasonically for 30 minutes to obtain reactant A.

[0030] Take the concentration as 5.00g / dm -3 80ml of metal platinum solution dissolved in aqua regia, dilute with distilled water to a concentration of 2g / dm -3 , add 1% Qutong X-100 surfactant 5ml, add 3g sodium bisulfite (NaHSO3) while stirring, react for 1 hour, and the pH of the solution is about 2.7 at this time, to obtain solution B.

[0031] Dilute B to 200ml with distilled water, add 20ml of 30% H 2 o 2 , the pH value of the solution in the reaction system was adjusted to 7 with 10% NaOH solution to obtain solution C.

[0032] Mix reactants A ...

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Abstract

This invention provides a carbon carrying PtFe alloy electric catalyst and its preparation method used in PEM electrolyte fuel cell electrode with Pt solution dissolved with aqua regia as the precursor and Fe as doped element to be uniformly deposited on the carbon powder carrier in liquid phase, then to carry out gas / solid reduction reaction in high temperature reduction farness with hydrogen asthe reducing agent to make Pt and Fe form carbon carrying PtFe electric catalyst uniformly distributed on the carbon carrier in the size small than 5nm.

Description

technical field [0001] The invention relates to a new carbon-supported platinum-iron alloy electrocatalyst used for proton exchange membrane electrolyte fuel cell electrodes and a preparation method thereof. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is an electrochemical device that directly converts chemical energy into electrical energy. It uses perfluorosulfonic acid solid polymer as electrolyte, H 2 for fuel, O 2 Or air is the oxidant, and the main reaction product is water, which is an ideal environment-friendly energy conversion technology. In addition, in addition to the general characteristics of fuel cells, PEMFC also has the advantages of low operating temperature (below 100 °C), fast start-up at low temperature, no electrolyte loss, high energy conversion efficiency, and long life. It is especially suitable as a mobile power source, It is the most promising power source for electric vehicles in the future, and it is also a hot d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/42H01M4/90H01M4/92
CPCY02E60/50
Inventor 张萍袁润章潘牧巩英鹏
Owner WUHAN UNIV OF TECH
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