Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (06): 932-934.doi: 10.3866/PKU.WHXB20070627

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AgNi Alloy Used as Anodic Catalyst for Direct Borohydride Fuel Cells

FENG Rui-Xiang; CAO Yu-Liang; AI Xin-Ping; YANG Han-Xi   

  1. College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, P. R. China

  • Received:2006-11-23 Revised:2007-01-15 Published:2007-06-04
  • Contact: YANG Han-Xi E-mail:ece@whu.edu.cn

Abstract:

AgNi alloy power was prepared as anodic catalyst for direct borohydride fuel cells by mechanical ball-milling method. The XRD and SEMevidences revealed that the alloy powder was composed of nanosized crystallites aggregated into micrometer particles. It was found from electrochemical experiments that the AgNi catalyst could not only catalyze the direct electrochemical oxidation of borohydride ions, but also depress the chemical hydrolysis of borohydride ions, so as to produce a discharge capacity of KBH4 over 3500 mAh·g-1, which corresponded to a 90% utilization of the BH-4 ions as anodic fuel.

Key words: AgNi alloy, Mechanical ball-milling, Borohydride, Fuel cells

MSC2000: 

  • O643