The study of basic concepts of electrocatalyst designs

1.利用ad原子设计电催化剂。(1)ad原子对半导体电极上光电化学分解水、CO氧化和CO_2还原的影响。与以前的工作相比，原子分散的PtAd原子对反应产物的选择性有了显著的提高。(2)Ad原子对醇类及相关化合物在铂电极上电氧化的基本步骤的影响。结果表明，吸附氧的ad原子对后续反应的第一步或后续步骤有促进作用，而不吸氧的ad原子抑制了第一步反应，抑制了反应的进行。单晶面对甲醇及其相关化合物氧化的电催化活性。用电化学方法对制备的铂和铟的表面进行了鉴定。绘制了酶活性和对自抑制的耐受性图，表面差异很大。突破了高分散铂催化剂的“微晶尺寸效应”，采用高比表面积载体，在微晶直径约1.4 nm的超细催化剂上获得了极高的活性。

1. Design of electrocatalysts by ad-atoms.(1) Effect of ad-atoms on a photoelectrochemical water splitting, an oxidation of CO, and a reduction of CO_2 on semiconductor electrodes. Distinctive enhancements and selectivity of reaction products by atomically dispersed Pt ad-atoms have obtained in comparison with previous works, which appeared at the coverage of surface with ad-atoms of ca. 0.5.(2) Effect of ad-atoms on the elementally steps of electrooxidation of alcholes and the relating compounds on platinum electrodes. It was revealed that oxygen-adsorbing ad-atoms can enhance either the first or the following steps in the successive reactions, but non-oxygen-adsorbing ad-atoms inhibit the first elementary step, in the inhibition of the tolal reaction.2. Electrocatalytic activity of single crystyal planes for the oxidation of methanol and the relating compounds. Prepared surfaces of Pt and Ir were identified electrochemically. The maps of the activity and the tolerance to self-inhibition have been made, which showed great difference smong the surfaces.3. Break-through to the so-called "crystallite size effect" on highly dispersed Pt catalyst.The problem was solved by using high surface area support, resulting in extremely high activity at the ultra-fine catalyst of a crystallite diameter of ca. 1.4 nm.