Spinel MnCo2O4 nanoparticles cross-linked with two-dimensional porous carbon nanosheets as a high-efficiency oxygen reduction electrocatalyst

被引:0
作者
Gengtao Fu
Zhenyuan Liu
Jingfei Zhang
Jiayan Wu
Lin Xu
Dongmei Sun
Jubing Zhang
Yawen Tang
Pei Chen
机构
[1] Nanjing Normal University,Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science
[2] Shaanxi Normal University,Key Laboratory of Applied Surface and Colloid Chemistry (MOE), School of Materials Science and Engineering
[3] the University of Texas at Austin,Materials Science and Engineering Program & Texas Materials Institute
来源
Nano Research | 2016年 / 9卷
关键词
spinel MnCo; O; carbon; porous nanosheets; electrocatalysis; oxygen reduction reaction;
D O I
暂无
中图分类号
学科分类号
摘要
Catalysts for the oxygen reduction reaction (ORR) play an important role in fuel cells. Alternative non-precious metal catalysts with comparable ORR activity to Pt-based catalysts are highly desirable for the development of fuel cells. In this work, we report for the first time a spinel MnCo2O4/C ORR catalyst consisting of uniform MnCo2O4 nanoparticles cross-linked with two-dimensional (2D) porous carbon nanosheets (abbreviated as porous MnCo2O4/C nanosheets), in which glucose is used as the carbon source and NaCl as the template. The obtained porous MnCo2O4/C nanosheets present the combined properties of an interconnected porous architecture and a large surface area (175.3 m2·g-1), as well as good electrical conductivity (1.15 × 102 S·cm-1). Thus, the as-prepared MnCo2O4/C nanosheets efficiently facilitate electrolyte diffusion and offer an expedite transport path for reactants and electrons during the ORR. As a result, the as-prepared porous MnCo2O4/C nanosheet catalyst exhibits enhanced ORR activity with a higher onset potential and current density than those of its counterparts, including pure MnCo2O4, carbon nanosheets, and Vulcan XC-72R carbon. More importantly, the porous MnCo2O4/C nanosheets exhibit a comparable electrocatalytic activity but superior stability and tolerance toward methanol crossover effects than a high-performance Pt/C catalyst in alkaline medium. The synthetic strategy outlined here can be extended to other nonprecious metal catalysts for application in electrochemical energy conversion.
引用
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页码:2110 / 2122
页数:12
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