高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (11): 2260.

• 研究论文 • 上一篇    下一篇

Ir/CNTs催化剂的制备及对氨的电催化氧化

孔庆梅1, 蒋玉芝1, 陈冲1, 周益明1, 陆天虹1, 陈煜1, 唐亚文1,2   

  1. 1. 南京师范大学化学与材料科学学院, 江苏省新型动力电池重点实验室, 南京 210046;
    2. 南京理工大学材料化学实验室, 南京 210094
  • 收稿日期:2010-01-21 出版日期:2010-11-10 发布日期:2010-11-10
  • 通讯作者: 陈煜. E-mail: ndchenyu@yahoo.cn; 唐亚文. E-mail: tangyawen@njnu.edu.cn
  • 基金资助:

    国家“八六三”计划项目(批准号: 2006AA05Z137, 2007AA05Z143, 2007AA05Z159)和国家自然科学基金(批准号: 20873065)资助.

Preparation of Ir/CNTs Catalyst and Its Electrocatalytic Performance for Ammonia Oxidation

KONG Qing-Mei1, JIANG Yu-Zhi1, CHEN Chong1, ZHOU Yi-Ming1, LU Tian-Hong1, CHEN Yu1*, TANG Ya-Wen1, 2*   

  1. 1. College of Chemistry and Materials Science, Jiangsu Key Laboratory of New Power Batteries, Nanjing Normal University, Nanjing 210046, China;
    2. Materials Chemistry Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2010-01-21 Online:2010-11-10 Published:2010-11-10
  • Contact: CHEN Yu. E-mail: ndchenyu@yahoo.cn; TANG Ya-Wen. E-mail: tangyawen@njnu.edu.cn
  • Supported by:

    国家“八六三”计划项目(批准号: 2006AA05Z137, 2007AA05Z143, 2007AA05Z159)和国家自然科学基金(批准号: 20873065)资助.

摘要: 分别以碳纳米管(CNTs)和XC-72活性碳为载体制备了Ir/CNTs和Ir/C催化剂. X射线衍射(XRD)结果显示, CNTs拥有更高的石墨化程度. 电化学研究结果表明, 与Ir/C催化剂相比, Ir/CNTs对氨氧化具有更高的电流密度、更低的起始氧化电位和更好的稳定性. 同时, Ir/CNTs催化剂对氨检测的线性范围更宽, 灵敏度更高, 检出限更低.

关键词: 氨气氧化, 电催化活性, 碳纳米管, 铱, 传感器

Abstract: Ir/CNTs and Ir/C catalysts were prepared with multi-wall carbon nanotubes(CNTs) and Vulcan XC-72 activated carbon(XC-72) as supporting carbon material, respectively. X-ray diffraction(XRD) measurements show the graphitization degree of CNTs is higher than that of XC-72, which indicates that CNTs possesses higher electron conductivity than that of XC-72. In comparison to Ir/C catalyst, the Ir/CNTs catalyst has higher oxidation current, lower onset oxidation potential and better stability for ammonia electro-oxidation. During the electrochemical detection of ammonia, the Ir/CNTs catalyst modified electrode possesses a lower detection-limit, a wider linear range of detection and a higher sensitivity compared to Ir/C catalyst. Thus, CNTs may be an ideal catalyst supporting material for the practical application of amperometric NH3 sensor.

Key words: Ammonia oxidation, Electrocatalytic activity, Carbon nanotube, Ir, Sensor

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