用于CO低温氧化负载型纳米金催化剂研究进展

Research Progress of Supported Nanosized Gold Catalysts for Low-temperature CO Oxidation

一氧化碳(CO)催化氧化反应因在工业、环保、军事、人类生活等方面应用广泛而受到人们普遍关注,如激光器中微量CO的消除、封闭体系中CO的消除、汽车尾气净化以及质子交换膜燃料电池中少量CO的消除等。近年来关于纳米金催化剂用于CO低温氧化反应的研究已成为备受关注的热点。阐述了金颗粒尺寸、载体种类、制备方法、制备条件等对催化剂活性的影响,总结了催化机理的研究现状和导致催化剂失活的因素,最后对其未来的发展进行了展望。

The catalytic oxidation of carbon monoxide （CO） at low temperature has attracted considerable attennon because oi its wide application in industry, environmental protection, military, and many aspects of human life, such as the exhaust abatement for CO2 lasers, trace CO removal in enclosed atmospheres, automotive emission control, and CO preferential oxidation （PROX） for proton exchange membrane fuel cells （PEMFC）. In recent years the nanosized gold catalysts for low-temperature CO oxidation become the study hotspot. The effects of gold particles size, support kinds, preparation method and preparation condition on the catalysts activity is mainly introduced. The research status of the catalytic mechanism and causes for catalyst deactivation are reviewed, and finally brief prospect over the future research directions of this field.