负载型贵金属催化剂氧化分解甲醛的研究进展

Research Progress of Supported Noble Metal Catalysts in Catalytic Oxidation of Formaldehyde

甲醛(HCHO)是主要的室内污染气体之一,长期处于含甲醛的环境会对人体健康产生不利影响。因此,从室内空气中去除甲醛至关重要。室温下,采用贵金属催化剂将甲醛氧化为无毒的二氧化碳和水,是目前最有前景的去除甲醛的方法之一。本文介绍了近年来铂(Pt)、金(Au)、钯(Pd)和银(Ag)四种负载型贵金属催化剂在室温下去除甲醛的研究进展,讨论了负载型贵金属催化剂影响甲醛去除的因素,分析了催化氧化甲醛的机理,并对负载型贵金属催化剂在室温下催化氧化甲醛提出了展望。

Formaldehyde(HCHO)is one of the major pollutants in indoor air,and long-term exposure to the environment containing formaldehyde is harmful and may cause health problems.Therefore,it is necessary to eliminate HCHO from indoor air.Supported noble metal catalysts can completely oxidized HCHO into harmless H 2O and CO 2 at ambient temperature,which is regarded as the most promising strategy for the removal of HCHO.In this review,we summarize the recent advances in room-temperature HCHO oxidation over noble metal-based catalysts,which contain platinum(Pt),gold(Au),palladium(Pd),and silver(Ag).In particular,the factors affecting the removal efficiency of formaldehyde,the mechanisms for catalytic oxidation of HCHO over supported noble metal catalysts at room temperature and perspectives for future research in this area are also reviewed.