钛基铂系、镍系双金属纳米电极材料的一步法制备与电催化活性

项目名称： 钛基铂系、镍系双金属纳米电极材料的一步法制备与电催化活性

项目编号： No.20876038

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 化学工业

项目作者： 易清风

作者单位： 湖南科技大学

项目金额： 35万元

中文摘要： 具有高度电催化活性、性能稳定并且成本适中的新型电极材料的制备是燃料电池的重要研究内容之一。本项目利用水热法，直接将两种纳米金属颗粒（包括以铂为主的铂类双金属以及以镍为主的镍类双金属）同时沉积于钛基体上，一步制备出电催化活性优异、结构独特的新型钛基铂类双金属和镍类双金属电极材料；应用电化学技术，分析它们对甲醇和甲酸氧化反应的电催化活性；通过对催化剂颗粒的表面形貌、结构及组成的分析，揭示两种金属颗粒在钛表面的共沉积机理；通过阐述不同金属纳米颗粒之间的相互作用方式，探索这类新型的钛基网状多孔纳米双金属催化剂的电催化活性规律，从而较为系统地揭示金属配比、结构形态与它们的催化活性之间的关系。这类新型的钛基双金属催化剂的制备过程简单，独特的网络状多孔结构使它们具有巨大的表面活性面积和高度稳定的催化活性，具有重要的研究意义。

中文关键词： 钛基双金属电催化剂；纳米多孔材料；甲醇氧化；甲酸氧化

英文摘要： Development of novel electrocatalysts with highly electrocatalytic activity and high stability is important for the study of fuel cells. In this project, we are planning to study the co-deposition of two metal nanoparticles on the surface of titanium substrates in order to fabricate novel Ti-supported platinum-involved binary and nickel-involved binary electrodes. Their electrocatalytic activity for the oxidation of methanol and formic acid is evaluated by using electrochemical techniques. The co-deposition mechanism of two metal particles on the Ti surface will be illustrated according to the surface texture of the catalysts and the analysis of their chemical compositions. The electrocatalytic activity rules of these novel Ti-supported network nanoporous binary metal catalysts will be examined on the basis of the study on interaction of various nano-metal particles so that we discover the dependance of the catalytic activity of the catalysts upon the interaction mechanism and morphological structures of the two metal particles. The preparation of these new Ti-supported binary metal catalysts is simple, and they present considerably large surface areas and highly stable catalytic activity because of their network porous structures.

英文关键词： Ti-supported binary metal electrocatalysts; Nanoporous materials; Methanol oxidation; Formic acid oxidation