文献类型：期刊文献

英文题名：Structural and kinetic insights into Pt/CNT catalysts during hydrogen generation from ammonia borane

作者：Chen, Wenyao[1];Wang, Zijun[1];Duan, Xuezhi[1];Qian, Gang[1];Chen, De[2];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2018

卷号：192

起止页码：1242

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20172403762600);WOS:【SCI-EXPANDED(收录号:WOS:000443999000098)】；

基金：This work was financially supported by the Natural Science Foundation of China (21306046), the Shanghai Natural Science Foundation (17ZR1407300 and 17ZR1407500), the Shanghai Rising-Star Program (17QA1401200), Fundamental Research Funds for the Central Universities (222201718003 and WA1514013), the Open Project of State Key Laboratory of Chemical Engineering (SKL-Che-15C03), and the 111 Project of the Ministry of Education of China (B08021).

语种：英文

外文关键词：Structure-activity relationship; Kinetic and isotopic analyses; Catalyst surface and electronic properties; Hydrogen generation; Catalyst durability

摘要：Unraveling the structural and kinetic consequences of catalyst properties, which vary with the catalyst preparation methods, on their catalytic behaviors is of prime scientific and industrial importance. Exemplified by Pt/CNT-catalyzed hydrolytic dehydrogenation of ammonia borane (AB), this work examines the origin of the crucial impacts of the catalyst reduction methods (i.e., in situ reduction with AB and ex situ reduction with H-2) on the surface and electronic properties of the catalyst as well as the consequent hydrogen generation activity and durability. Kinetic and isotopic analyses reveal that the Pt/CNT-ex situ catalyst has low activation energy and a strong ability to activate water. The relationship between the catalyst structure and performance is established, and the unique surface (e.g., fewer Pt-O bonds) and electronic properties (e.g., higher Pt binding energy) of the Pt/CNT-ex situ catalyst are deemed to be responsible for the high activity and durability. The insights reported in this work highlight the importance of understanding the preparation-structure-performance relationship to guide the rational design of catalysts. (C) 2017 Elsevier Ltd. All rights reserved.