Issue 18, 2013
From the journal:

Nanoscale

Synthesis of three-dimensional reduced graphene oxide layer supported cobalt nanocrystals and their high catalytic activity in F–T CO2 hydrogenation†

Fei He,a   Na Niu,a   Fengyu Qu,b   Shuquan Wei,b   Yujin Chen,*c   Shili Gai,a   Peng Gao,*a   Yan Wanga  and  Piaoping Yang*a  

* Corresponding authors

a Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, P. R. China
E-mail: yangpiaoping@hrbeu.edu.cn, gaopeng@hrbeu.edu.cn

b Key Laboratory of Semiconductor Nanocomposite Materials, Ministry of Education, Harbin Normal University, Harbin, P. R. China

c College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
E-mail: chenyujin@hrbeu.edu.cn

Abstract

The reduced graphene oxide (rGO) supported cobalt nanocrystals have been synthesized through an in situ crystal growth method using Co(acac)2 under solvothermal conditions by using DMF as the solvent. By carefully controlling the reaction temperature, the phase transition of the cobalt nanocrystals from the cubic phase to the hexagonal phase has been achieved. Moreover, the microscopic structure and morphology as well as the reduction process of the composite have been investigated in detail. It is found that oxygen-containing functional groups on the graphene oxide (GO) can greatly influence the formation process of the Co nanocrystals by binding the Co2+ cations dissociated from the Co(acac)2 in the initial reaction solution at 220 °C, leading to the 3D reticular structure of the composite. Furthermore, this is the first attempt to use a Co/rGO composite as the catalyst in the F–T CO2 hydrogenation process. The catalysis testing results reveal that the as-synthesized 3D structured composite exhibits ideal catalytic activity and good stability, which may greatly extend the scope of applications for this kind of graphene-based metal hybrid material.

Graphical abstract: Synthesis of three-dimensional reduced graphene oxide layer supported cobalt nanocrystals and their high catalytic activity in F–T CO2 hydrogenation

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Article information

DOI
https://doi.org/10.1039/C3NR03038E
Article type
Paper
Submitted
13 Jun 2013
Accepted
25 Jun 2013
First published
28 Jun 2013

Nanoscale, 2013,5, 8507-8516

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Synthesis of three-dimensional reduced graphene oxide layer supported cobalt nanocrystals and their high catalytic activity in F–T CO2 hydrogenation

F. He, N. Niu, F. Qu, S. Wei, Y. Chen, S. Gai, P. Gao, Y. Wang and P. Yang, Nanoscale, 2013, 5, 8507 DOI: 10.1039/C3NR03038E

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