纳米材料电催化进展--电催化剂表面结构调控与性能

Progresses in Electrocatalysis of Nanomaterials—Tuning the Surface Structure and Property of Electrocatalysts

电催化剂的结构决定其性能.从微观层面研究表面结构与催化性能之间的内在联系和规律是设计和研制高活性、高稳定性、高选择性电催化剂的基础.本文以本研究组关于氢和氧的吸脱附、乙二醇氧化和CO2还原的研究结果为主,综述了电催化剂表面结构和性能调控方面的研究进展.给出面心立方晶体不同晶带上铂单晶电极的循环伏安特征,电催化性能和规律,在此基础上创建的金属纳米晶体表面结构控制和生长的电化学方法,以及对具有开放结构、高催化活性和高稳定性的Pt和Fe纳米晶催化剂的形状和表面结构控制合成.

The property of an electrocatalyst depends strongly on its surface structure. The study of surface structure-catalytic functionality is the base of design and preparation of eleetrocatalysts of high activity, high stability and high selectivity at microstructure level. In this paper, based mainly on our results coneering hydrogen and oxygen adsorption-desorption, ethylene glycol oxidation and CO2 reduction, the research progresses in tuning the surface structure and property of electrocatalysts are summarized. This paper overviews firstly the cyclic voltammetric characteristics, electrocatalytic properties of platinum single crystal planes lying on different crystallo- graphic zones of the unit stereographic triangle of face-centered cubic （fee） metals. Next, the innovation of electrochemical methods to control the surface structure and growth of metal nanocrystal is introduced. And finally, the synthesis and property of Pt and Fe nanocrystal catalysts of open surface structure with high catalytic activity and high stability are reviewed.