CO催化氧化用纳米材料及其最新研究成果

当前,环境问题和能源危机已经威胁到人类的健康和生存。用于环境治理和化学能源合成新概念的纳米催化材料越来越受到人们的关注。催化作为一个特殊的纳米现象,是纳米材料应用领域的一个重要方向,在环境净化、能量转化和新化学品的生产等方面具有广泛的应用前景。早期的一氧化碳(CO)催化氧化研究主要集中在催化剂的制备方法以及制备条件对催化反应的影响等方面。本文针对CO催化氧化这一基础课题,以影响CO催化氧化的关键因素(如金属颗粒的大小,金属与载体之间的相互作用以及载体本身的作用等)为主线,简要概述了近年来CO催化氧化的催化机理及相关催化剂的最新研究进展。同时,结合我们课题组的一些最新研究结果,进一步指出了纳米材料在CO催化氧化方面还存在的一些值得关注的问题,并对未来CO氧化催化剂的研究做出展望,提出一些可行的研究方向。

Recent Research Progress and Applications of Nano Catalytic Materials for CO Oxidation

Recently,the issues of environmental pollution and the energy crisis have threatened the health and survival of human being.Nanomaterials used for the remediation of environment and the synthesis of chemical energy source have drawn increasing attention.As an inherently nanoscopic phenomenon,catalysis with important applications in environmental cleaning,energy conversion,and production of new chemicals,has always been an important research direction in the application of nanomaterials.Previously,the research work of CO oxidation was mainly concentrated on the effects of preparative routes and synthesis parameters of catalysts on the catalytic reactions.This review aims at the fundamental topic of CO catalytic oxidation,in which the main impact factors(e.g.,dimensions of metal nano-particles on the supports,the interactions between metals and supports,and the roles of support-self) of CO oxidation are taken as the focus,and the developments of the catalytic mechanisms and various catalysts for carbon monoxide(CO) oxidation are summarized.Meanwhile,combining with the latest work in our group,some noteworthy problems about the applications of nano catalytic materials in CO conversion are pointed out.Finally,some suggestions for the preparation of CO oxidation catalysts,and some feasible research directions are put forward.