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发布时间：2019-03-12

论文类型：期刊论文

发表时间：2018-07-01

发表刊物：ACS CATALYSIS

收录刊物：SCIE

卷号：8

期号：7

页面范围：6486-6494

ISSN号：2155-5435

关键字：iridium; rhenium; bifunctional effect; hydrogenation; succinic acid; strong electrostatic adsorption

摘要：Aqueous phase hydrogenation of succinic acid was investigated using a series of Ir-Re/C bimetallic catalysts prepared by strong electrostatic adsorption. Activity measurements show remarkable synergistic effects, forming a volcano-shaped plot over a range of bulk Re mole fractions with a peak at a fraction of 0.4-0.5, which corresponds to a 20-fold enhancement of activity over either monometallic catalyst. This intermediate catalyst composition exhibiting optimum activity strongly suggests a bifunctional effect. Through a consecutive reaction pathway with gamma-butyrolactone as an intermediate, the main product is tetrahydrofuran with 60-75% selectivity. Butanol formation is minimized with decreasing Re mole fraction.