文献类型：期刊文献

英文题名：Kinetic insights into structure sensitivity of Ru catalyzed L-alanine hydrogenation to alaninol

作者：Song, Rui[1];Yao, Chang[1];Li, Wenhua[1];An, Nihong[2];Shen, Yafeng[2];Fei, Nina[1];Ge, Xiaohu[1];Cao, Yueqiang[1,3];Duan, Xuezhi[1];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Sino Platinum Ind Catalyst Yunnan Co Ltd, 988 Keji Rd, Kunming 650106, Yunnan, Peoples R China;[3]Minist Educ, Engn Res Ctr Resource Utilizat Carbon Containing, Shanghai 200237, Peoples R China

年份：2024

卷号：10

期号：1

起止页码：135

外文期刊名：REACTION CHEMISTRY & ENGINEERING

收录：;EI(收录号：20244417304135);WOS:【SCI-EXPANDED(收录号:WOS:001344190600001)】；

基金：This work was financially supported by the Natural Science Foundation of China (22332003, 22478106 and 22178100), Shanghai Rising-star Program (23QA1401900), Shanghai Science and Technology Innovation Action Plan (22JC1403800), Program of Shanghai Academic/Technology Research Leader (21XD1421000), Young Elite Scientists Sponsorship Program by CAST (2023QNRC001), Open Project of Yunnan Precious Metals Laboratory Co., Ltd (YPML-2023050272), and Postdoctoral Fellowship Program of CPSF under Grant Number GZB20240222.

语种：英文

外文关键词：Catalysis - High resolution transmission electron microscopy - Hydrogenation - Metal nanoparticles - Nanoclay - Reaction rates - Ruthenium

摘要：Hydrogenation achieved on supported metal catalysts is normally structure sensitive, and comprehensive understanding of such sensitivity is pivotal for gaining insights into the active sites as well as the design of catalysts. Herein, a series of differently sized Ru nanoparticles supported on carbon nanotube (CNT) were prepared and employed as catalysts for l-alanine hydrogenation to examine the structure sensitivity of amino acid hydrogenation. The reaction rates for l-alanine conversion and the formation of alaninol are demonstrated to be strongly dependent on the sizes of Ru nanoparticles, highlighting the structure sensitivity of the l-alanine hydrogenation. The activation energies extracted from kinetic studies are insensitive to the sizes of Ru nanoparticles on the Ru catalysts sized >= 1.3 nm with similar electronic properties, pointing to a predominant type of active site for l-alanine hydrogenation. By further combining model calculations with the shape of Ru nanoparticles determined by transmission electron microscopy, the Ru(101) sites are identified as the dominant active sites for l-alanine conversion and alaninol formation, which is further rationalized by density functional theory calculations. The kinetic insights into such structure sensitivity are believed to be important for the design and optimization of catalysts for the reaction.