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碳化钨和Vulcan XC-72炭混合载Ir催化剂对氨氧化的电催化性能

郁明珠1,李林儒1,陆天虹1,陈赵杨2,马淳安2,杜江燕1*   

  1. (1.南京师范大学化学与材料科学学院 南京 210097；2.浙江工业大学化学工程和材料科学学院 杭州 310032)
  • 收稿日期:2012-06-06 修回日期:2012-07-21 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 杜江燕,教授; Tel:025-85891651; Fax:025-85891767; E-mail:dujiangyan@njnu.edu.cn; 研究方向：电化学传感器和生物电化学
  • 基金资助:
    江苏高校优势学科建设工程和浙江工业大学绿色化学合成技术国家重点实验室培育基地资助项目

Electrocatalytic Performanace of Ir Catalyst Supported on Mixture of WC and Vulcan XC-72 Carbon for Ammonia Oxidation

YU Mingzhu1, LI linru1, LU Tianhong1, CHEN Zhaoyang2, MA Chunan2, DU Jiangyan1*   

  1. (1.School of Chemistry and Material Science,Nanjing Normal University,Nanjing 210097,China;
    2.College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310032,China)
  • Received:2012-06-06 Revised:2012-07-21 Published:2013-04-10 Online:2013-04-10

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1457

被引次数

8 | 1

摘要： 以碳化钨（WC）和Vulcan XC-72炭黑(XC)为载体制备了XC载Ir（Ir/XC）和WC/XC载Ir（Ir-WC/XC）催化剂，在用X射线能量色散谱、X射线衍射谱对催化剂表征的基础上，用电化学方法研究了2种载体Ir催化剂对氨氧化的电催化性能，发现氨在Ir-WC/XC催化剂电极上的氧化峰峰电流密度比在Ir/XC催化剂电极上大31.26%，而且电催化稳定性明显好于Ir/XC催化剂。

关键词: 氨氧化, 碳化钨和炭黑载铱催化剂, 电催化性能, 电流型电化学传感器

Abstract: In this paper, the Ir catalysts supported on Vulcan XC-72 carbon(XC)(Ir/XC) and on the mixture of WC and Vulcan XC-72C(Ir-WC/XC) were prepared. Based on the characterizations with energy dispersive spectroscopy and X-ray diffraction patterns, the electrocatalytic performances of the two Ir catalysts on different supports for ammonia oxidation were investigated using the electrochemical techniques. It showed that the current density of the ammonia oxidation peak at the Ir-WC/XC catalyst electrode is 31.26% larger than that at the Ir/XC catalyst electrode. Furthermore, the electrocatalytic stability of the Ir-WC/XC catalyst is obviously better than that at the Ir/XC catalyst.

Key words: ammonia oxidation, tungsten carbide and Vulcan XC-72 carbon supported Ir catalyst, electrocatalytic performance, current type of electrochemical sensor

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