高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

Zn-空气电池中二维与三维结构碳负载Mn3O4的催化性能比较

李峰, 刘海晶, 王永刚, 李会巧, 夏永姚

  

  1. 复旦大学化学系, 上海市分子催化和功能材料重点实验室, 上海 200433
  • 收稿日期:2007-04-28 修回日期:1900-01-01 出版日期:2007-11-10 发布日期:2007-11-10
  • 通讯作者: 夏永姚

Comparison of Catalytic Performance of Mn3O4-loaded Two-dimensional and Tree-dimensional Msoporous Carbon Mterials in Znc-air Bttery

LI Feng, LIU Hai-Jing, WANG Yong-Gang, LI Hui-Qiao, XIA Yong-Yao*   

  1. Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
  • Received:2007-04-28 Revised:1900-01-01 Online:2007-11-10 Published:2007-11-10
  • Contact: XIA Yong-Yao

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摘要： 采用湿法浸渍将Mn3O4负载到不同碳材料的表面, 测试了这些复合材料用于空气电极催化剂的电催化性能. 通过充放电和循环伏安等电化学测试发现, 具有三维孔道结构的介孔碳材料(CMK-3)的催化性能远比二维孔道结构的介孔碳(OMC)的好. 从透射电子显微镜观察发现, 氧化锰粒子均负载在碳的外表面, 位于三维孔道外表面的氧化锰可以与电解液和碳孔道内的氧气同时接触. 这种结构产生了大量有效的三相反应界面, 从而达到良好的催化效果.

关键词: 氧还原, 介孔碳, 锌-空气电池, 电催化

Abstract: Mn3O4 nano-particles were loaded on the surface of different carbon materials by the wet-penetration method, and the electrocatalytic performance of these composite materials were evaluated as cathode in zinc-air battery. It was found that the mesoporous carbon (CMK-3) with three-dimensional ordered structure exhibits the better catalytic performance than that of two-dimensional ordered mesoporous carbon (OMC) by charging/discharging and cyclic voltammograms test. The images of TEM indicate that Mn3O4 nano-particles were all loaded on the outer-surface of the carbon materials. In particular, the unique structure of the Mn3O4/CMK-3 composite can provide both effective gas diffusion path and sufficient effective three-phase interface area, thus resulting in its high electrocatalytic activity for oxygen reduction.

Key words: Oxygen reduction, Mesoporous carbon, Zinc-air battery, Electrocatalysis

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