ABSTRACT

Compared with fossil-dependent process, glycerol hydrogenolysis to 1,2-propanediol (1,2-PDO) is a green sustainable route with much advantage. The commercial scale of this reaction has been achieved, and catalysts with high efficiency are continuously developed. Cu-based catalysts are considered as the most selective catalysts for 1,2-PDO production, which are widely investigated up to now. Understanding the structure-activity relationship can help the design of new catalytic materials with improved activity, selectivity and stability. In this review, the roles of various active structures on Cu catalysts are summarized. We introduce firstly the pioneering works, showing that Cu species are the primary active sites which can catalyze both the glycerol dehydration and C = O bond hydrogenation steps. Then, we summarize various viewpoints about the structure-sensitive effect of Cu in the reaction. The functions of support and promoter are subsequently discussed in detail, and the roles of the secondary metal site are further overviewed. After that, we propose critical factors that should be considered when investigating the Cu structure sensitive effect, and summarize three general roles of support, promoter and secondary metal. Further important research directions for Cu catalysts in glycerol hydrogenolysis are also outlined.

摘要

与依赖化石的工艺相比，甘油氢解制1,2-丙二醇（1,2-PDO）是一条绿色可持续路线，具有很大优势。该反应已实现工业化规模，并不断开发高效催化剂。铜基催化剂被认为是生产 1,2-PDO 最具选择性的催化剂，目前已被广泛研究。了解构效关系有助于设计具有更高活性、选择性和稳定性的新型催化材料。在这篇综述中，总结了各种活性结构对铜催化剂的作用。我们首先介绍了开创性的工作，表明Cu物种是可以催化甘油脱水和C = O键加氢步骤的主要活性位点。然后，我们总结了关于Cu在反应中的结构敏感效应的各种观点。随后详细讨论了载体和促进剂的功能，并进一步概述了次金属位点的作用。之后，我们提出了研究铜结构敏感效应时应考虑的关键因素，并总结了载体、促进剂和二次金属的三种一般作用。还概述了Cu催化剂在甘油氢解中的进一步重要研究方向。并总结了载体、促进剂和次生金属三种一般作用。还概述了Cu催化剂在甘油氢解中的进一步重要研究方向。并总结了载体、促进剂和次生金属三种一般作用。还概述了Cu催化剂在甘油氢解中的进一步重要研究方向。