文献类型：期刊文献

英文题名：Polyoxometalates-engineered hydrogen generation rate and durability of Pt/CNT catalysts from ammonia borane

作者：Fu, Wenzhao[1];Han, Chen[1];Li, Dali[1];Chen, Wenyao[1,2];Ji, Jian[1];Qian, Gang[1];Yuan, Weikang[1];Duan, Xuezhi[1];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada

年份：2020

卷号：41

起止页码：142

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20192407041846);WOS:【SCI-EXPANDED(收录号:WOS:000495924600021)】；

基金：This work was supported by the National Natural Science Foundation of China (21776077), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the Shanghai Rising-Star Program (17QA1401200), the Open Project of SKLOCE (SKL-Che-15C03), the Shanghai Natural Science Foundation (17ZR1407300 and 17ZR1407500), and the State Key Laboratory of Organic-Inorganic Composites (oic-201801007).

语种：英文

外文关键词：Polyoxometalates; Pt/CNT; Electronic properties; Hydrogen generation; Durability

摘要：Heterogeneously catalyzed hydrolytic dehydrogenation of ammonia borane is a remarkable structure sensitive reaction. In this work, a strategy by using polyoxometalates (POMs) as the ligands is proposed to engineer the surface and electronic properties of Pt/CNT catalysts toward the enhanced hydrogen generation rate and durability. Three kinds of POMs, i.e., silicotungstic acid (STA), phosphotungstic acid (PTA) and molybdophosphoric acid (PMA), are comparatively studied, among which the STA shows positive effects on the catalytic activity and durability. A catalyst structure-performance relationship is established by a combination of kinetic and isotopic analyses with multiple characterization techniques, such as HAADF-STEM, EDS, Raman spectroscopy and XPS. It is shown that the STA compared to the other two POMs can increase the Pt binding energy and thus promote the reaction. The insights demonstrated here could open a new avenue for boosting the reaction by employing the POMs as the ligands to engineer the catalyst electronic properties. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.