直接硼氢化钠燃料电池用阳极催化剂AuNi/C  

Anode catalyst AuNi/C for direct sodium borohydride fuel cell

作　　者：王广进[1] 高云智[1,2] 王振波[1,2] 尹鸽平[1,2] 

机构地区：[1]哈尔滨工业大学化工学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学光宇化学电源研究所,黑龙江哈尔滨150001

出　　处：《电池》2010年第5期241-244,共4页Battery Bimonthly

摘　　要：用硼氢化钠还原法制备了AuNi/C催化剂,进行了XRD分析和循环伏安测试。样品Au7Ni3/C的氧化峰电流密度最大,比样品Au/C提高了56.9%,且在XRD图中没有金属Ni的衍射峰,可认为Au与Ni形成了合金,它们的协同作用提高了催化活性。使用样品Au7Ni3/C的直接硼氢化钠燃料电池,在60℃时的最大功率密度为26.6 mW/cm2;随着电流密度的增大,库仑效率提高,电子转移数(N)变大;当电流密度为100 mA/cm2时,电子转移数增大到7.38并趋于稳定,接近理论值8。AuNi/C catalysts were synthesized by sodium borohydride reduction method, XRD analysis and cyclic voltametry test were taken. The sample Au7 Ni3/C had the highest peak current density,56.9% higher than that of sample Au/C, no diffraction peak of metal Ni in its XRD pattern, which indicated Au and Ni was formed the alloy, their synergies improved the catalytic activity. The peak power density of direct sodium borohydride fuel cell using sample Au7Ni3/C was 26.6 mW/cm2 at 60 ℃ . The columbic efficiency increased and electron transfer number （N） enlarged with the increasing of the current density. When the current density was 100 mA/cm2, the electron transfer number reached 7.38 and kept steady, near to the theoretical value 8.

关 键 词：直接硼氢化钠燃料电池(DSBFC) 阳极催化剂 放电性能 电子转移数 

分 类 号：TM911.48[电气工程—电力电子与电力传动]