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题名: Effect of the degree of dispersion of Pt over MgAl2O4 on the catalytic hydrogenation of benzaldehyde
作者: Yan, Feng1, 2;  Zhao, Caixian1;  Yi, Lanhua1;  Zhang, Jingcai2;  Ge, Binghui3;  Zhang, Tao2;  Li, Weizhen2
关键词: Platinum ;  MgAl2O4 spinel ;  Single-atom catalyst ;  Selective hydrogenation ;  Benzaldehyde ;  Benzyl alcohol
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2017-09-01
DOI: 10.1016/S1872-2067(17)62815-8
卷: 38, 期:9, 页:1613-1620
收录类别: SCI ;  ISTP
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: \ One of the central tasks in the field of heterogeneous catalysis is to establish structure-function relationships for these catalysts, especially for precious metals dispersed on the sub-nanometer scale. Here, we report the preparation of MgAl2O4-supported Pt nanoparticles, amorphous aggregates and single atoms, and evaluate their ability to catalyze the hydrogenation of benzaldehyde. The Pt species were characterized by N-2 adsorption, X-ray diffraction (XRD), aberration-corrected transmission electron microscopy (ACTEM), CO chemisorption and in situ Fourier transform infrared spectroscopy of the chemisorbed CO, as well as by inductively coupled plasma atomic emission spectroscopy. They existed as isolated or neighboring single atoms on the MgAl2O4 support, and formed amorphous Pt aggregates and then nanocrystallites with increased Pt loading. On the MgAl2O4 support, single Pt atoms were highly active in the selective catalytic hydrogenation of benzaldehyde to benzyl alcohol. The terrace atoms of the Pt particles were more active but less selective; this was presumably due to their ability to form bridged carbonyl adsorbates. The MgAl2O4-supported single-atom Pt catalyst is a novel catalyst with a high precious atom efficiency and excellent catalytic hydrogenation ability and selectivity. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词[WOS]: LIQUID-PHASE HYDROGENATION ;  SINGLE-ATOM CATALYSTS ;  CO OXIDATION ;  BENZYL ALCOHOL ;  RU/C CATALYSTS ;  PLATINUM ;  TEMPERATURE ;  ZEOLITES ;  SURFACES
语种: 英语
WOS记录号: WOS:000411423600022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150197
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Xiangtan Univ, Minist Educ, Sch Chem, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

Recommended Citation:
Yan, Feng,Zhao, Caixian,Yi, Lanhua,et al. Effect of the degree of dispersion of Pt over MgAl2O4 on the catalytic hydrogenation of benzaldehyde[J]. CHINESE JOURNAL OF CATALYSIS,2017,38(9):1613-1620.
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