中文摘要：

引言 对于便携式燃料电池来说，燃料的“随载”储存尤为重要，开发使用液态燃料的直接液态进料燃料电池（DLFFC）一直是研究者们的努力方向，其中，直接硼氢化物燃料电池（DBFC）受到广泛关注嘲，所用液态燃料为碱金属硼氢化物（MBH4）溶液。MBH4是一种含氢负离子H^-的类甲烷四面体阴离子化合物，广泛用作还原剂；但同时还是一种理想的储氢材料，如NaBH4含10．6%（质量分数）的氢。

英文摘要：

Polarization data of BH4^- oxidation on Cu anode in alkaline solution were measured at steady state by a self-made experimental cell. The experimental polarization curve showed three regions, the region at lower over-potential η （below 0. 4 V approximately）, the region at higher η （above 0.6 V approximately） and the transitional region at medium η. It was found that the limiting current density is caused by the limiting elemental step rather than the external mass transport. The apparent reaction order with respect to BH4 changes from 0 to 1. The active energy is about 40 kJ · mol^-1 in both regions with lower and higher η, and is higher than 40 kJ · mol^-1 in the transitional region. With the experimental temperatures and NaOH concentration, the hydrogen production rates released by the electrode reaction were measured at [BH4^-] /[OH^-] ratios of 1 ： 40, 1 ： 20, 1 ： 6.7 and 1 ： 4, which is strongly dependent on the over-potential. The apparent number of released electron n by the reaction was calculated by using the measured amounts of hydrogen and coulomb. Higher value of n was obtained at lower [BH4^- ] /[OH^-] ratio, higher temperature as well as higher over-potential. Under the experimental conditions, the value of n varies from 0 to 7, while in the transitional region it is just in the range of 3 to 5. The experimental results indicate that the limiting current density or n value will increase by virtue of proper experimental conditions. However, to considerably increase the current density at lower overpotential requires a modified anode with higher activity.