球形微粒Co3O4电极催化氧化硫离子

doi:10.3866/PKU.WHXB20110240

物理化学学报 >> 2011, Vol. 27 >> Issue (03): 627-632.doi: 10.3866/PKU.WHXB20110240

球形微粒Co₃O₄电极催化氧化硫离子

劳国洪¹, 邵海波¹, 樊玉欠¹, 王建明¹, 张鉴清^1,2, 曹楚南^1,2

1. 浙江大学化学系, 杭州 310027;
2. 中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 沈阳 110016

收稿日期:2010-10-13 修回日期:2010-12-07 发布日期:2011-03-03
通讯作者: 邵海波 E-mail:haohb@zju.edu.cn
基金资助:
浙江省自然科学基金(Y406192)和高等学校博士学科点专项科研基金(20070335157)资助项目

Catalytic Oxidation of Sulfide Ion over a Spherular-Co₃O₄ Electrode

LAO Guo-Hong¹, SHAO Hai-Bo¹, FAN Yu-Qian¹, WANG Jian-Ming¹, ZHANG Jian-Qing^1,2, CAO Chu-Nan^1,2

1. Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China;
2. S. tate Key Laboratory for Corrosion and Protection of Metal, Institute of Metal Research, Chinese Academy of Sciences, Shengyang 110016, P. R. China

Received:2010-10-13 Revised:2010-12-07 Published:2011-03-03
Contact: SHAO Hai-Bo E-mail:haohb@zju.edu.cn
Supported by:
The project was supported by the Natural Science Foundation of Zhejiang Province, China (Y406192) and Specialized Research Fund for the Doctoral Program of Higher Education, China (20070335157).

摘要/Abstract

摘要：

尝试用氨蒸发诱导合成方法在石墨小片上生长球形Co₃O₄微粒, 并用其制备电极且进行S^2-的电化学氧化研究. 用极化曲线、恒电位技术等电化学方法考察了Co₃O₄电极对S^2-的电化学氧化的催化性能, 发现Co₃O₄电极对电化学氧化S^2-具有优异的催化性能, 极大地促进了-0.40 V 附近S^2-向含硫的酸根离子和低级多硫离子的转变, 电流密度最大可以达到580 mA·cm^-2. 恒电位极化表明电极的电催化稳定性良好; 电化学阻抗谱(EIS)测试显示Co₃O₄在碱性S^2-电解液中的电荷转移电阻很小, 这从电化学动力学角度解释了它对S^2-具有良好的催化性能.

关键词: Co₃O₄电极, 硫离子, 电催化

Abstract:

Spherular-Co₃O₄ particles were synthesized on graphite electrode surface by ammonia-evaporation-induction. Its electrooxidation catalytic behavior for sulfide ions in an alkaline solution was investigated by electrochemical measurements such as potentiodynamic scanning and potentiostatic polarization. We found that high catalytic activity and the highest current density of 580 mA·cm^-2 were obtained at -0.40 V. In addition, its catalytic performance was stable during potentiostatic polarization. Electrochemical impedance spectroscopy (EIS) indicated a low charge transfer resistance, which explained the high catalytic activity from the viewpoint of electrochemical kinetics.

Key words: Co₃O₄ electrode, Sulfide ion, Electrocatalysis

MSC2000:

O646

劳国洪, 邵海波, 樊玉欠, 王建明, 张鉴清, 曹楚南. 球形微粒Co₃O₄电极催化氧化硫离子[J]. 物理化学学报, 2011, 27(03): 627-632.

LAO Guo-Hong, SHAO Hai-Bo, FAN Yu-Qian, WANG Jian-Ming, ZHANG Jian-Qing, CAO Chu-Nan. Catalytic Oxidation of Sulfide Ion over a Spherular-Co₃O₄ Electrode[J]. Acta Phys. -Chim. Sin., 2011, 27(03): 627-632.

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球形微粒Co₃O₄电极催化氧化硫离子

Catalytic Oxidation of Sulfide Ion over a Spherular-Co₃O₄ Electrode

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