合成气制取低碳混合醇Cu-Co双金属催化剂研究进展

Research progress of Cu-Co bimetallic catalysts to the production of higher alcohols from syngas

近年来,合成气制低碳醇Cu-Co基催化剂备受关注,催化剂的活性中心和构效关系等问题被广泛研究。本文基于这些研究,归纳和分析了Cu-Co双金属催化剂的设计思路、对催化剂双活性中心结构的认识和制备方法等的演变,重点阐述了催化剂中纳米化Cu-Co合金相的形成对催化剂反应性能的影响及其制备的难点和改善该活性相反应稳定性的方法;认为从纳米尺度上对催化剂进行设计,使催化剂表面具有丰富的Cu-Co双活性中心,并进一步改善催化剂在长期运行过程中的稳定性是今后研究的重点。

Recently,the Cu-Co-based catalysts for higher alcohols synthesis(HAS)from syngas have been studied extensively.The nature of the active sites and the structure-activity relationship has been systematically investigated and understood.This paper summarizes and analyzes the concepts to design the Cu-Co bimetallic catalyst,the structure of dual active sites and the corresponding evolution of various preparation methods.Especially,the influence of nano-CuCo alloy on the catalytic performance of HAS catalyst,the difficulties of its preparation,and the methods to improve the stability of the active phase during reactions are discussed.It is believed that designing the catalyst at the nanometer scale to enrich Cu-Co dual active sites on catalyst surface,and further improving the catalyst stability during long-term operation may be the focus of the future researches.