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High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt

Cobra 添加于 2011/4/24 12:14:51  6782次阅读 | 0次推荐 | 4个评论

The prohibitive cost of platinum for catalyzing the cathodic oxygen reduction reaction (ORR) has hampered the widespread useof polymer electrolyte fuel cells. We describe a family of non–precious metal catalysts that approach the performance of platinum-basedsystems at a cost sustainable for high-power fuel cell applications, possibly including automotive power. The approach usespolyaniline as a precursor to a carbon-nitrogen template for high-temperature synthesis of catalysts incorporating iron andcobalt. The most active materials in the group catalyze the ORR at potentials within ~60 millivolts of that delivered by state-of-the-artcarbon-supported platinum, combining their high activity with remarkable performance stability for non–precious metal catalysts(700 hours at a fuel cell voltage of 0.4 volts) as well as excellent four-electron selectivity (hydrogen peroxide yield <1.0%).

作 者:Wu, Gang; More, Karren L.; Johnston, Christina M.; Zelenay, Piotr
期刊名称: Science
期卷页: 04/22/2011 第332卷 第6028期 443~页
学科领域:化学科学 » 化学工程及工业化学 »
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原文链接:http://www.sciencemag.org/content/332/6028/443.abstract?sid=1e5b3331-908a-48c9-a7ce-ef1818602587
DOI: 10.1126/science.1200832
ISBN: 0036-8075
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相关报道: http://paper.sciencenet.cn/htmlpaper/2011424121549716404.shtm
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