Low temperature pyrolyzed cobalt tetramethoxy phenylporphyrin catalyst and its applications as an improved catalyst for metal air batteries

JOURNAL OF POWER SOURCES

卷:195

Article

Zhu, Aaron Li¹  Wang, Haijiang¹  Qu, Wei¹  Li, Xiaoxia¹  Jong, Zoe¹  Li, Hui¹ 

[1] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada

关键词: Alkaline electrolyte;    Catalyst;    CoTMPP/C;    Metal-air battery;    Oxygen reduction reaction (ORR);   

DOI  :  10.1016/j.jpowsour.2010.03.015

来源: Elsevier

【 摘 要 】

As an alternative catalyst to replace the expensive platinum-based catalysts for oxygen reduction reaction (ORR) in both proton exchange membrane (PEM) fuel cells and metal-air batteries, tetra methoxyphenyl porphyrin cobalt complex, CoTMPP, has drawn much attention in the areas of ORR catalyst synthesis and characterization. In the present work, CoTMPP is investigated at varying temperatures of pyrolysis, ranging from 410 to 810 degrees C, to determine the optimal temperature of pyrolysis to produce catalysts with desirable properties. Carbon supported pyrolyzed CoTMPP catalyst (CoTMPP/C) was assessed using Xray diffraction and Raman, a number of varied electrochemical tests, as well as a single cell test. Through these, it has been found that the CoTMPP/C, pyrolyzed at 410 degrees C, demonstrates superior catalytic activity towards ORR, and has a higher fuel cell performance than the catalysts pyrolyzed at 800 degrees C, the industry standard pyrolysis temperature. This paper also utilizes scanning auger microscopy (SAM) to accredit the origin of the increased activity to the bond N-C(O), which plays a major role in catalysis and is decomposed at higher temperatures. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

【 授权许可】

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