富氢气氛中CO优先氧化CuO-CeO_2基催化剂的研究进展

Research progress of CuO-CeO_2-based catalysts for preferential oxidation of CO in hydrogen-rich gas

CuO-CeO2基催化剂对富氢气氛中CO优先氧化具有优良的活性和选择性,是替代贵金属最具潜力的催化体系之一。本文系统总结了CO优先氧化用CuO-CeO2基催化剂的研究现状,着重阐述催化剂制备工艺、成分优化、助剂改性、载体调变等对催化性能的影响规律,介绍催化活性位与CO优先氧化的催化机理,探讨催化剂稳定性与失活机制等,同时指出该催化体系目前存在的主要问题,并展望了今后一段时期可能的发展趋势。

Research progress of CuO-CeO2-based catalysts for preferential oxidation of CO in hydrogen-rich gas is reviewed in this paper.The present status of CuO-CeO2-based catalysts is analyzed.The effects of preparation technology,composition optimization,additive modification and carrier promotion on catalytic properties of CuO-CeO2-based catalysts are summarized.The active sites,catalytic mechanism,stability and deactivation of the catalysts are presented.The obstacles for practical application of the catalysts are pointed out.Based on the aforementioned analysis,the possible near future development trend of the CuO-CeO2-based catalysts is forecasted.