以碱金属硼氢化物为燃料的直接硼氢化物燃料电池(DBFC),是一种有发展潜力的移动电源。DBFC阳极过程是一个复杂的H^--H^0*.H^+之间价态转化的电极反应体系,涉及BH4^-的电氧化反应、BH4^-的水解释氢反应与氢的电氧化反应,该过程不仅与电极材料有关,也与反应条件有关。研究能有效抑制释氢的廉价阳极催化材料,是DBFC实用化的关键。本文对近年来报道的DBFC阳极催化材料以及BH4^-在不同阳极材料上的电化学氧化反应机理进行了综述,并归纳出需要深入研究的主要问题。
Direct borohydride fuel cell (DBFC) is a potential power supplier in portable applications using alkali metal borohydride as fuel. The anodic oxidation reactions of BH4- is involved with a novel and complex reaction system of three hydrogen valence state transformation among protide (H^-) -protium (H^0* ) -proton (H^+), which related to borohydride direct electrochemical oxidation and hydrolysis reaction with hydrogen evolution followed hydrogen electrochemical oxidation reaction. The character of anodic oxidation of borohydride depends on not only the electrocatalyst but also reaction conditions. The key for DBFC developing is to depress hydrogen evolution and reduce costs of anode catalysts. In this article, reported anode electrocatalysts of DBFC' s as well as mechanism details of borohydride oxidation reaction are reviewed, and main issues for further research works are summed up.