不同载量Ir／C催化剂对氨氧化的电催化性能  

Electrocatalytic Performance of Carbon Supported Ir Catalysts with Different Ir Loadings for Ammonia Oxidation

作　　者：蒋玉芝[1] 孔庆梅[1] 陆天虹[1] 周益明[1] 唐亚文[1] 

机构地区：[1]南京师范大学江苏省生物功能材料重点实验室,化学与环境科学学院,江苏南京210097

出　　处：《电化学》2009年第4期387-391,共5页Journal of Electrochemistry

基　　金：上海RAE工程技术中心传感器研发部资助

摘　　要：研究电流型电化学氨气传感器阳极碳载Ir(Ir/C)催化剂电催化NH3氧化性能.实验表明,在NaC lO4中性电解液中,Ir/C催化剂对NH3氧化的电催化性能与Ir载量有关.其中以Ir载量为10%(by m ass)的Ir/C催化剂的电催化性能最好,稳定性和灵敏度也最高.此外,NH3在不同载量的Ir/C催化剂上电催化氧化的电流密度与NH3浓度均呈现出良好的线性关系,此类Ir/C催化剂在电流型电化学氨气传感器中可望有良好的应用前景.The electrocatalytic performance of the Ir/C catalyst as the anodic catalyst in the amperometric and electrochemical NH3 sensor was investigated. The experimental results illustrated that in the NaClO4 neutral electrolyte, the electrocatalytic performance of the Ir/C catalyst for the NH3 oxidation is related to the Ir loading in the Ir/C catalyst. Among the Ir/C catalysts with different Ir loading, the best electrocatalytic activity, stability and sensitivity were achieved by the Ir/C catalyst with 10% Ir loadings. In addition, the current densities of the NH3 oxidation at the Ir/C catalysts with the different Ir loadings tion. The Ir/C catalyst has a potential application in the ampero were linearly proportional to the NH3 concentra- metric and electrochemical NH3 sensor.

关 键 词：Ir/C催化剂 氨气氧化 催化活性 Ir载量 

分 类 号：O643.36[理学—物理化学]