Pt/纳米碳管空气电极氧还原反应的电催化性能

电化学（中英文） ›› 2004, Vol. 10 ›› Issue (4): 384-390.

Pt/纳米碳管空气电极氧还原反应的电催化性能

赵峰鸣,马淳安

浙江工业大学应用化学系纳米科学与技术工程研究中心,浙江工业大学应用化学系纳米科学与技术工程研究中心浙江杭州310032 ,浙江杭州310032

收稿日期:2004-11-28 修回日期:2004-11-28 出版日期:2004-11-28 发布日期:2004-11-28

Electrocatalytic Performances of Carbon Nanotube Air Electrode for Oxygen Reduction

ZHAO Feng-ming, MA Chun-an~*

(Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, China

Received:2004-11-28 Revised:2004-11-28 Published:2004-11-28 Online:2004-11-28

摘要/Abstract

摘要： 　以不同质量比的铂、纳米碳管、活性炭为催化层制备空气电极并测定其稳态极化曲线和交流阻抗.研究发现,纳米碳管经硝酸处理后其氧还原反应性能得到提高,特别是将表面氧化后再沉积Pt,对氧的电还原反应影响更显著.以质量比4∶1的活性炭/纳米碳管载Pt制备的空气电极,在过电位ηc为500～600mV下,氧还原电流可达600～700mA·cm-2.EIS测试表明,纳米碳管载Pt后的欧姆极化阻抗和电化学阻抗均非常小.

关键词: 纳米碳管, 电催化, 空气电极, 电化学阻抗

Abstract: The air electrodes with different mass ratio of Pt/active carbon or carbon nanotube as catalyst layer material have been prepared. The electrocatalytic performances for oxygen reduction were evaluated by means of polarization curve and electrochemical impedance spectroscopy (EIS). The results disclosed that carbon nanotubes dealt with nitric acid in the catalyst layer had been improved obviously on the electrocatalytic activity. After the surface of carbon nanotube was oxygenated and aggraded with platinum, the catalyst had obviously effects on the electrocatalytic activity. The air electrode with the mass ratio of active carbon to Pt/carbon nanotube in 4∶1 showed better electrocatalytic activity, e.g., the output current density reached 600～700 mA cm~(-2) when the overpotential was 500～600 mV. The EIS showed that the addition of Pt/carbon nanotube in the catalyst decreased greatly ohmic and kinetic impedance and thereby produced greater enhancement in performances.

中图分类号:

TM911

赵峰鸣, 马淳安. Pt/纳米碳管空气电极氧还原反应的电催化性能[J]. 电化学（中英文）, 2004, 10(4): 384-390.

ZHAO Feng-ming, MA Chun-an~ . Electrocatalytic Performances of Carbon Nanotube Air Electrode for Oxygen Reduction[J]. Journal of Electrochemistry, 2004, 10(4): 384-390.

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https://electrochem.xmu.edu.cn/CN/Y2004/V10/I4/384

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