Different active sites in a bifunctional Co@N-doped graphene shells based catalyst for the oxidative dehydrogenation and hydrogenation reactions | |
Department | 苏州研究院 |
Li JL(李金磊)1,2; Liu GL(刘国亮)1; Long XD(龙向东)1,2; Gao G(高广)1; Wu J(吴君)1,2; Li FW(李福伟)1; Li FW(李福伟) | |
The second department | osso国家重点实验室 |
2017 | |
Source Publication | Journal of Catalysis |
ISSN | 0021-9517 |
Volume | 355Pages:53-62 |
Abstract | Low-cost, active and stable catalysts, with a bifunctional capability if possible, are required to achieve the chemical transformations between saturated and unsaturated N-heterocycles. In this work, Co@N-doped graphene shells (Co@NGS) was used as a bifunctional catalyst with high activity and stability for the oxidative dehydrogenation (ODH) and hydrogenation (HYD) of quinolines. The excellent performance can be attributed to the synergetic effect of N-doped graphene, underlying Co nanoparticles, and the encapsulation structure in which carbon shells protect Co from leaching and aggregation. Poisoning tests with KSCN and spectroscopic analysis clearly unveil that the active sites for ODH and HYD are quite different: N-doped graphene shells modified by Co NPs via electron transfer serve as active sites for the O2 activation in ODH, while the underlying Co NPs promoted by N dopants favor the H2 activation in HYD. This finding challenges the previous concept of N-doped carbon sites as active sites for both ODH and HYD. The bifunctional property is due to the access of both N-doped graphene and Co sites to small molecules in our one-pot pyrolyzed Co@NGS catalysts. |
Keyword | Co@n-doped Graphene Shells Bifunctional Catalysts Oxidative Dehydrogenation Hydrogenation Active Sites |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1016/j.jcat.2017.09.007 |
Funding Organization | the Chinese Academy of Sciences;the National Natural Science Foundation of China (21503242;21522309;21603244;21773271);Suzhou Science and Technology Projects (SYG201518;SYG201519) |
Indexed By | SCI |
If | 6.844 |
Language | 英语 |
Funding Project | 均相催化研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22762 |
Collection | 苏州研究院 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Li FW(李福伟) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Suzhou Res Inst, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100000, Peoples R China |
Recommended Citation GB/T 7714 | Li JL,Liu GL,Long XD,et al. Different active sites in a bifunctional Co@N-doped graphene shells based catalyst for the oxidative dehydrogenation and hydrogenation reactions[J]. Journal of Catalysis,2017,355:53-62. |
APA | Li JL.,Liu GL.,Long XD.,Gao G.,Wu J.,...&李福伟.(2017).Different active sites in a bifunctional Co@N-doped graphene shells based catalyst for the oxidative dehydrogenation and hydrogenation reactions.Journal of Catalysis,355,53-62. |
MLA | Li JL,et al."Different active sites in a bifunctional Co@N-doped graphene shells based catalyst for the oxidative dehydrogenation and hydrogenation reactions".Journal of Catalysis 355(2017):53-62. |
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