Citation: Wang Tingting, Yang Jian, Chen Jiayi, He Qinggang, Li Zhongjian, Lei Lecheng, Lu Jianguo, Leung Michael K. H., Yang Bin, Hou Yang. Nitrogen-doped carbon nanotube-encapsulated nickel nanoparticles assembled on graphene for efficient CO₂ electroreduction[J]. Chinese Chemical Letters, ;2020, 31(6): 1438-1442. doi: 10.1016/j.cclet.2020.04.056 shu

Nitrogen-doped carbon nanotube-encapsulated nickel nanoparticles assembled on graphene for efficient CO₂ electroreduction

Wang Tingting ^a ,
Yang Jian ^a ,
Chen Jiayi ^a ,
He Qinggang ^a ,
Li Zhongjian ^a ,
Lei Lecheng ^a ,
Lu Jianguo ^c ,
Leung Michael K. H. ^d ,
Yang Bin ^a,*, ,
Hou Yang ^a,b,e,*,

a.
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
b.
Institute of Zhejiang University-Quzhou, Quzhou 324000, China
c.
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
d.
Ability R&D Energy Research Centre(AERC), School of Energy and Environment, City University of Hong Kong, Hong Kong 999077, China
e.
Ningbo Research Institute, Zhejiang University, Ningbo 315100, China

keyangb@zju.edu.cn

yhou@zju.edu.cn

Received Date: 17 April 2020
Revised Date: 28 April 2020
Accepted Date: 30 April 2020
Available Online: 5 May 2020

Figures(6)

Exploring 3D hybrid nanocarbons encapsulated with metal nanoparticles (NPs) are recently considered as emerging catalysts for boosting CO₂ electroreduction reaction (CRR) under practical and economic limits. Herein, we report a one-step pyrolysis strategy for fabricating N-doped carbon nanotube (CNT)-encapsulated Ni NPs assembled on the surface of graphene (N/NiNPs@CNT/G) to efficiently convert CO₂ into CO. In such 3D hybrid, the particle size of Ni NPs that coated by five graphitic carbon layers is less than 100 nm, and the amount of N dopants introduced into graphene with countable CNTs is determined to 7.27 at%. Thanks to unique CNT-encapsulated Ni NPs structure and N dopants, the achieved N/NiNPs@CNT/G hybrid displays an exceptional CRR activity with a high Faradaic efficiency of 97.7% and large CO partial current density of 7.9 mA/cm² at -0.7 V, which outperforms those reported metallic NPs loaded carbon based CRR electrocatalysts. Further, a low Tafel slope of 134 mV/dec, a turnover frequency of 387.3 CO/h at -0.9 V, and tiny performance losses during long-term CRR operation are observed on N/NiNPs@CNT/G. Experimental observations illustrate that the Ni NPs encapsulated by carbon layers along with N dopants are of great importance in the conversion of CO₂ into CO with high current density.
- CO₂ electroreduction,
- Graphene nanosheets,
- Ni nanoparticles,
- N dopants,
- 3D hybrid
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沈阳化工大学材料科学与工程学院沈阳 110142

Nitrogen-doped carbon nanotube-encapsulated nickel nanoparticles assembled on graphene for efficient CO2 electroreduction

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通讯作者: 陈斌, bchen63@163.com

Nitrogen-doped carbon nanotube-encapsulated nickel nanoparticles assembled on graphene for efficient CO₂ electroreduction