N-doped graphene confined Pt nanoparticles for efficient semi-hydrogenation of phenylacetylene

被引：46
|
作者：
Xia, Lixin [1 ]
Li, Dan [1 ]
Long, Jun [2 ]
Huang, Fei [3 ]
Yang, Lini [1 ]
Guo, Yushu [1 ]
Jia, Zhimin [3 ]
Xiao, Jianping [2 ]
Liu, Hongyang [3 ]
机构：
[1] Liaoning Univ, Dept Chem, Shenyang 110016, Liaoning, Peoples R China
[2] Westlake Univ, Sch Sci, Hangzhou 310012, Zhejiang, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
来源：
CARBON | 2019年 / 145卷
基金：
中国国家自然科学基金;
关键词：
TOTAL-ENERGY CALCULATIONS; ELASTIC BAND METHOD; CARBON; CATALYST; NANOSTRUCTURE; HYDROGENATION; PERFORMANCE; OXIDATION; LAYER; SHELL;
D O I：
10.1016/j.carbon.2019.01.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
N-doped graphene (N-graphene) confined Pt nanoparticles (NPs) with core-shell structure supported on carbon nanotubes (CN@Pt/CNTs) are prepared by a facile two-step process. The obtained N-graphene nanoshell ranging from 2 to 4 graphene layers and the Pt NPs covered within N-graphene are uniformly dispersed on the CNTs. The as-prepared CN@Pt/CNTs exhibits much higher styrene selectivity and robust recycle ability in selective hydrogenation of phenylacetylene, compared with that of traditional CNTs supported Pt NPs (Pt/CNTs). DFT calculation reveals that the high styrene selectivity is derived from the confinement effect of N-graphene, which facilitates desorption of styrene from Pt NPs surface, avoiding the over hydrogenation of styrene to benzylethane. The present method paves a new way to design high selective Pt based hydrogenation catalyst. (c) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：47 / 52
页数：6
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