Fabrication of Pd-based metal-acid-alkali multifunctional catalysts for one-pot synthesis of MIBK

作     者：Rui Ma Yunpeng Li Guandong Wu Yufei He Junting Feng Yingying Zhao Dianqing Li 马瑞;李云鹏;武冠东;贺宇飞;冯俊婷;赵莹莹;李殿卿

作者机构：State Key Laboratory of Chemical EngineeringBeijing University of Chemical TechnologyBeijing100029China Beijing Engineering Center for Hierarchical CatalystsBeijing University of Chemical TechnologyBeijing100029China 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2018年第39卷第8期

页      面：1384-1394页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：国家重点研发计划(2016YFB0301601) 国家自然科学基金(21706009) 中央高校基本科研业务费专项资金(BUCTRC201725,JD1816) 

主　　题：One‐pot synthesis of methyl isobutyl ketone Multifunctional catalyst Pd Mg3Al mixed metal oxide Synergy effect Proximity 

摘      要：The one-pot synthesis of methyl isobutyl ketone（MIBK） from acetone using multifunctional catalysts is an important sustainable organic synthesis method with high atom and energy ***. we report a series of Pd supported on mixed metal oxide（MMO） catalysts with controllable acidic/basic/metallic sites on the surface. We study the relationship between the nature, synergy,and proximity of active sites and the catalytic performance of the multifunctional catalyst in the tandem reaction, in detail. In the existence of Lewis acid and base sites, the catalysts with medium-strength acidic/basic sites show preferred activity and/or MIBK selectivity. For multifunctional catalysts, the catalytic properties are more than just a collection of active sites, and the Pd/Mg_3Al-MMO catalyst possessing 0.1% Pd loading and ~0.4 acid/base molar ratio exhibits the optimal 42.1% acetone conversion and 37.2% MIBK yield, which is among the best reported so far for this tandem reaction under similar conditions. Moreover, the proximity test indicates that the intimate distance between acidic/basic/metallic sites can greatly shorten the diffusion time of the intermediate species from each active site, leading to an enhancement in the catalytic performance.