Studies on State and Structure of Noble Metals in Electrocatalyst Made by Coprecipitation Method

Chemical Research in Chinese Universities ›› 2003, Vol. 19 ›› Issue (1): 89-93.

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Studies on State and Structure of Noble Metals in Electrocatalyst Made by Coprecipitation Method

HOU Zhong-jun¹, YU Hong-mei¹, YI Bao-lian¹, ZHANG Hua-min¹, HOU Ming¹, LEI Hao², CHENG Mo-jie², BAO Xin-he²

1. Fuel Cell R & D Center, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China;
2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China

Received:2001-12-24 Online:2003-01-24 Published:2011-08-06
Supported by:
Supported by the National 973 project(No.G2000026410) and Inovation Funds of Dalian Insitute of Chemical Physics.

Abstract

Abstract: The electrocatalysts of Pt/C, PtRu/C and Ru/C were prepared by the impregnation method. The facet characterization, the dispersion and the particle size for the catalysts were determined by means of X-ray diffraction and transmission electron microscopy. X-ray photoelectron spectroscopy was also used to analyze the state and the valency of the noble metals. The results show that the particle size was in nanometer range and the binary metals have come into being an alloy. The platinum in the catalysts existed in zero valency. The valency of the ruthenium on the surface is different from that in the body, while the ruthenium on the surface existed in oxide-form. PtRu/C and Pt/C are of good activity to the electrooxidation of hydrogen except Ru/C. PtRu/C is more tolerant of CO than Pt/C, and CO is only adsorbed on Pt.

Key words: Proton exchange membrane fuel cell, Coprecipitation method, Electrocatalyst, PtRu/C, XPS

HOU Zhong-jun, YU Hong-mei, YI Bao-lian, ZHANG Hua-min, HOU Ming, LEI Hao, CHENG Mo-jie, BAO Xin-he. Studies on State and Structure of Noble Metals in Electrocatalyst Made by Coprecipitation Method[J]. Chemical Research in Chinese Universities, 2003, 19(1): 89-93.

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Studies on State and Structure of Noble Metals in Electrocatalyst Made by Coprecipitation Method

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