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Agni-catalyzed anode for direct borohydride fuel cells

2007; Elsevier BV; Volume: 32; Issue: 17 Linguagem: Inglês

10.1016/j.ijhydene.2007.08.001

1879-3487

Rubo Feng, Hongzhou Dong, Yuliang Cao, Xingping Ai, Huijun Yang,

Hydrogen Storage and Materials

Ag and AgNi powders were comparatively tested as anodic catalysts for direct electrochemical oxidation of borohydride. Discharge experiments demonstrated for the first time that both Ag and AgNi electrode can catalyze the electrooxidation of borohydride, delivering a high capacity of >7e oxidation for a borohydride ion. In comparison, AgNi-catalyzed borohydride fuel cells exhibited a higher discharge voltage and capacity, possibly due to a combined action of the electrocatalytic activity of Ni component for borohydride electrooxidation and the depression of borohydride hydrolysis by Ag atoms.