石墨烯载Ir催化剂对氨氧化的电催化性能

doi:10.3969/j.issn.0251-0790.2012.01.017

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (01): 102.doi: 10.3969/j.issn.0251-0790.2012.01.017

石墨烯载Ir催化剂对氨氧化的电催化性能

李林儒¹, 付宏刚², 陆天虹^1,3

1. 江苏省新型动力电池重点实验室, 南京师范大学化学与材料科学学院, 南京 210097;
2. 黑龙江大学教育部功能无机材料化学重点实验室, 哈尔滨 150080;
3. 中国科学院长春应用化学研究所, 长春 130022

收稿日期:2011-05-31 出版日期:2012-01-10 发布日期:2011-12-20
通讯作者: 陆天虹,男,博士,研究员,博士生导师,主要从事化学电源研究.E-mail:tianhonglu@263.net E-mail:tianhonglu@263.net
基金资助:
国家自然科学基金(批准号: 20873065, 21073094)和江苏省高校优势学科建设工程项目资助.

Electrocatalytic Performance of Graphene Supported Ir Catalyst for Ammonia Oxidation

LI Lin-Ru¹, FU Hong-Gang², LU Tian-Hong^1,3

1. Jiangsu Province Key Laboratory of New Power Batteries, School of Chemistry and Material Science, Nanjing Normal University, Nanjing 210097, China;
2. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China;
3. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received:2011-05-31 Online:2012-01-10 Published:2011-12-20
Contact: LU Tian-Hong E-mail:tianhonglu@263.net

摘要/Abstract

摘要： 用石墨烯(G)代替Vulcan XC-72炭(XC)作Ir的载体制备石墨烯载Ir(Ir/G)催化剂. 电化学的测量结果表明, Ir/G催化剂对氨氧化的电催化性能优于XC炭载Ir(Ir/XC)催化剂. X射线衍射(XRD)谱测量结果表明, Ir/G和Ir/XC催化剂的Ir粒子平均粒径相似. 拉曼光谱的测量结果表明, G的石墨化程度和电导率高于XC. 因此, Ir/G催化剂对氨氧化的电催化性能优于Ir/XC催化剂. 氨在Ir/G催化剂电极上氧化的电流密度与氨浓度呈很好的线性关系曲线, 相关系数R为0.99557. 因此, Ir/G催化剂电极可作为电流型电化学氨传感器的工作电极.

关键词: 氨氧化, 石墨烯载铱催化剂, 电催化性能, 电流型电化学传感器

Abstract: Instead Vulcan XC-72 carbon(XC), grapheme(G) was used as the support to prepare the Ir/G catalyst. The electrochemical measurement indicted that the electrocatalytic performance of the Ir/G catalyst for the ammonia oxidation was better than that of the Ir/XC catalyst. XRD and TEM measurements indicated that the average sizes of Ir particles in Ir/G and Ir/XC catalysts were similar. The measurement of the Raman spectroscopy illustrates the graphitization extent of G is higher than that of XC. Thus, the conductivity of G is higher than that of XC. Therefore, the electrocatalytic performance of the Ir/G catalyst is better than that of the Ir/XC catalyst can be attributed to the high conductivity due to the high graphitization extent of G. The results show that there is the good linear relationship between the current density of the ammonia oxidation at the Ir/G catalyst electrode and the concentration of ammonia. The related coefficient(R) is 0.99557. Thus, Ir/G catalyst electrode can be used as the working electrode in the current type of electrochemical ammonia sensor.

Key words: Ammonia oxidation, Grapheme supprted Ir catalyst, Electrocatalytic performance, Current type of electrochemical sensor

中图分类号:

O646

TrendMD:

李林儒, 付宏刚, 陆天虹. 石墨烯载Ir催化剂对氨氧化的电催化性能. 高等学校化学学报, 2012, 33(01): 102.

LI Lin-Ru, FU Hong-Gang, LU Tian-Hong. Electrocatalytic Performance of Graphene Supported Ir Catalyst for Ammonia Oxidation. Chem. J. Chinese Universities, 2012, 33(01): 102.

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石墨烯载Ir催化剂对氨氧化的电催化性能

Electrocatalytic Performance of Graphene Supported Ir Catalyst for Ammonia Oxidation

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