电化学催化中的表面微观结构与特殊反应性能

Surface Structure and Properties in Electrocatalysis

综述以 C1分子的电催化氧化或还原作为探针反应 ,对电催化剂表面微观结构与性能的内在联系和规律进行研究的结果 .从研制不同原子排列结构的金属单晶电极的模型电催化研究 ,到研制不同纳米材料的载体电催化剂的应用研究 ,不仅对 C1分子反应的机理和动力学规律获得了深入认识 ,而且对电催化表面原子排列结构及修饰 ,纳米结构特征及其所引起的特殊电催化性能和异常红外效应等取得了一系列创新的研究结果 ,推动了相关理论和应用的进展 .

Electrocatalysis is the key subject in a few important fields such as energy conversion (fuel cells) and green chemistry (organic and inorganic electrosynthesis). The advanced study of electrocatalysis consists in revealing and controlling electrocatalytic reaction mechanism at molecule level, designing and preparing electrocatalysts based on well understanding of the intrinsic relationship between surface structure and its properties. This paper reviews our recent results concerning investigations, using C 1 molecules as probe, on the microscopic structure of electrocatalytic surface and the particular properties. From studies of model electrocatalysis by preparing well defined single crystal electrodes to applied electrocatalysis by using supported catalysts of nanometer scale material. We have revealed not only the electrocatalytic reaction mechanism and kinetics of C 1 molecules, but also the properties of different atomic arrangements, different modifications and different nanostructures of electrocatalyst surface. The abnormal infrared effects (AIREs) were discovered for the first time upon the study. The results presented in this paper have thrown new light in developing the related theories and applications.