文献类型：期刊文献

英文题名：Ir-Re alloy as a highly active catalyst for the hydrogenolysis of glycerol to 1,3-propanediol

作者：Deng, Chenghao[1];Duan, Xuezhi[1];Zhou, Jinghong[1];Zhou, Xinggui[1];Yuan, Weikang[1];Scott, Susannah L.[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

年份：2015

卷号：5

期号：3

起止页码：1540

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20151000607580);WOS:【SCI-EXPANDED(收录号:WOS:000350685400021)】；

基金：This work was supported by the National Natural Science Foundation of China (21106047). S. L. S. thanks the Center for Enabling New Technologies through Catalysis (CENTC) for financial support.

语种：英文

外文关键词：Agglomeration - Rhenium alloys - Solutions - Binary alloys - Iridium alloys - Rhenium - Glycerol - Hydrogenolysis - Rhenium compounds - Catalyst supports - Hydrolysis

摘要：In this work, bimetallic Ir-Re catalysts supported on KIT-6 are prepared by tuning the thermal treatment procedures, i.e., conventional calcination and reduction (Ir-Re/KIT-6-CR) and modified direct reduction (Ir-Re/KIT-6-R) after impregnation of two metal precursors. The structure of both catalysts is intensively characterized by H-2-TPR, STEM-HAADF-EDX, XPS and CO-DRIFTS. Results indicate that an Ir-Re alloy forms on the KIT-6 support when direct reduction is employed, which exhibits excellent catalytic performance in hydrogenolysis of glycerol. The formation rate of 1,3-propanediol over Ir-Re/KIT-6-R reaches 25.6 mol(1,3-PD) mol(Ir)(-1) h(-1) at 63% glycerol conversion with the addition of amberlyst-15 under 8 MPa H-2, 393 K and 20 wt% glycerol aqueous solution, almost twice that over Ir-Re/KIT-6-CR. It is revealed that Re species without prior calcination treatment could be fully reduced and therefore couple with Ir to form an Ir-Re alloy structure with enhanced resistance against particle aggregation, while the calcination and subsequent reduction leads to the formation of an Ir-ReOx structure since the rhenium oxide species generated during the calcination is difficult to be reduced.