In situ controllable synthesis of magnetite nanocrystals/CoSe2 hybrid nanobelts and their enhanced catalytic performance

Min-Rui Gao; Shuang Liu; Jun Jiang; Chun-Hua Cui; Wei-Tang Yao; Shu-Hong Yu

doi:10.1039/C0JM01547D

In situ controllable synthesis of magnetitenanocrystals/CoSe₂ hybrid nanobelts and their enhanced catalytic performance†‡

Min-Rui Gao,^a Shuang Liu,^a Jun Jiang,^a Chun-Hua Cui,^a Wei-Tang Yao^a and Shu-Hong Yu*^a

* Corresponding authors

^a Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, the National Synchrotron Radiation Laboratory University of Science and Technology of China, Hefei 230026, P. R. China
E-mail: shyu@ustc.edu.cn
Fax: +86 551 3603040

Abstract

Fe₃O₄ nanoparticles (NPs) with sizes of ca 5.3, 6.6, and 9.8 nm can be successfully loaded on the surface of CoSe₂-DETA hybrid nanobelts via a facile thermal reduction process in polyol solution. The resulting multifunctional nanocomposites are superparamagnetic at room temperature. Most interestingly, the electrocatalytic activity for the O₂ reduction reaction (ORR) of the constructed Fe₃O₄-decorated CoSe₂ nanobelts yield a decent enhancement compared with original CoSe₂-DETA catalysts, i.e., the onset potential and current density show 1.01 mA cm⁻² and 0.05 V increase at 0.3 V, 1600 rpm, respectively. Additionally, the number of electrons transferred (n) increases from 2.1 to 3.6 after integrating with Fe₃O₄ nanoparticles. The work described here has provided a promising route to the design and development of new Pt-free catalysts with high-performance by introducing other cheap NPs.

This article is part of the themed collection: Advanced Hybrid Materials

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Article information

DOI: https://doi.org/10.1039/C0JM01547D
Article type: Paper
Submitted: 21 May 2010
Accepted: 21 Jul 2010
First published: 29 Sep 2010

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J. Mater. Chem., 2010,20, 9355-9361

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In situ controllable synthesis of magnetite nanocrystals/CoSe₂ hybrid nanobelts and their enhanced catalytic performance

M. Gao, S. Liu, J. Jiang, C. Cui, W. Yao and S. Yu, J. Mater. Chem., 2010, 20, 9355 DOI: 10.1039/C0JM01547D

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