DBFC燃料电池Au基合金催化剂结构设计、性能表征及电催化特性研究

项目名称： DBFC燃料电池Au基合金催化剂结构设计、性能表征及电催化特性研究

项目编号： No.21203161

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 易兰花

作者单位： 湘潭大学

项目金额： 25万元

中文摘要： 直接硼氢化钠燃料电池(DBFC)因其燃料效率高，燃料运输存储方便、无催化剂中毒，产物无污染且理论开路电压(1.64V)、理论比容量(5.67Ah/g)和能量转化率(91%)高而倍受关注。DBFC发展的关键是阳极电催化剂。设计并制备Au基合金系列催化剂，通过研究催化剂的组成、结构和性能的关系，探讨催化剂对BH4-阳极氧化反应和水解反应的电催化机理，研究催化剂和载体的微观结构与表面状态、催化活性组分与载体的键合机制及催化活性组分的负载工艺等对催化剂活性和稳定性的影响，揭示各因素相互之间及其与电催化活性之间的作用规律，阐明催化剂性能衰减和效能提高的机制，发展低成本、高性能、长寿命的阳极电催化剂。设计半电池和单体电池测试装置，利用旋转圆盘电极与燃料电池测试系统，结合现代物理化学和电化学研究手段进行系统研究，为优化和完善燃料电池电极材料制备技术、发展新型催化剂提供理论依据和实验方法指导。

中文关键词： 直接硼氢化钠燃料电池；阳极催化剂；新型碳载体；BH4-电催化氧化；电池性能

英文摘要： The direct borohydride fuel cell (DBFC) has been extensively studied for many advantages, such as high fuel efficiency, easily to transport and conveniently to storage, no catalytic poisoning, and environmentally friendly. Moreover, DBFC has high theoretical open circuit voltage (1.64 V), high theoretical capacity (5.67 Ah/g) and energy convert efficiency (91%). The anode electrocatalyst is the key component in DBFC. In this proposal, we will focus on the design and synthesis of novel Au-based alloy catalysts. The chemical compositions, structures, physical and electrochemical properties of the synthesized electrocatalysts, and the electrocatalytic mechanisms for BH4- electrooxidation and hydrolysis reactions will be studied. The influence factors for the catalytic activity and stability of the catalysts, such as microstructure of catalysts and supports, bonding mechanism between catalysts and supports, experiment conditions during loading catalysts on supports. We will try to reveal the inter-correlation among these factors, and the relationship between these factors and the electrocatalytic performance of Au-based alloy catalysts. Furthermore, the mechanism for the decrease of catalytic activity and the increase of efficiency for the catalysts will be illuminated to develop new DBFC's anode electrocatalysts wi

英文关键词： Direct borohydride fuel cell；Anode catalyst；Novel carbon support；BH4- electrocatalytic oxidation；Cell performance