文献类型：期刊文献

英文题名：Tailoring electronic properties and kinetics behaviors of Pd/N-CNTs catalysts for selective hydrogenation of acetylene

作者：Cao, Yueqiang[1];Fu, Wenzhao[1];Ren, Zhouhong[2];Sui, Zhijun[1];Zhou, Jinghong[1];Luo, Jun[2];Duan, Xuezhi[1];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]Tianjin Univ Technol, Inst New Energy Mat & Low Carbon Technol, Tianjin, Peoples R China

年份：2020

卷号：66

期号：4

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20194907776459);WOS:【SCI-EXPANDED(收录号:WOS:000499289200001)】；

基金：Shanghai Natural Science Foundation, Grant/Award Numbers: 17ZR1407300, 17ZR1407500; Fundamental Research Funds for the Central Universities, Grant/Award Number: 222201718003; National Basic Research Program of China, Grant/Award Number: 2012CB720500; Natural Science Foundation of China, Grant/Award Number: 21776077; Open Project of State Key Laboratory of Chemical Engineering, Grant/Award Number: SKLChe-15C03; Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning; Shanghai Rising-Star Program, Grant/Award Number: 17QA1401200; State Key Laboratory of Organic-Inorganic Composites, Grant/Award Number: oic-201801007

语种：英文

外文关键词：acetylene hydrogenation; electronic properties; kinetics behaviors; nitrogen doping of CNT support; Pd; CNT catalyst

摘要：Pd catalyzed selective hydrogenation of acetylene shows remarkable electronic effects. In this work, a strategy is proposed to tailor the electronic properties of Pd nanoparticles by nitrogen doping of carbon nanotubes (CNT) support toward the improved reaction kinetics. While excluding the Pd size effects, the intrinsic promotional effects of the nitrogen doping are demonstrated, which are mainly due to the increased Pd electron density resultant from the presence of more graphitic nitrogen species based on X-ray photoelectron spectroscopy measurements and density functional theory (DFT) calculations. Kinetics analysis and C2H2/C2H4-temperature-programmed desorption (TPD) measurements reveal that the electron-rich Pd catalyst with the moderately weakened adsorption strength can give rise to the decreased activation energy and thus the simultaneously enhanced activity, selectivity, and stability. The aspects demonstrated here could guide the rational design and optimization of Pd catalysts for the selective hydrogenation of acetylene.