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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 activity of Ir (C) / Ir (Ir / C) catalyst for the current electrochemical ammonia sensor was investigated. The results showed that the electrocatalytic activity of the Ir / C catalyst for NH3 oxidation in the neutral electrolyte of NaC104 was similar to that of Ir The Ir / C catalyst with the Ir loading of 10% (by m ass) had the highest electrocatalytic activity and the highest stability and sensitivity.Furthermore, NH3 was electrocatalyzed on Ir / C catalysts with different loadings Oxide current density and NH3 concentration showed a good linear relationship, such Ir / C catalyst in the current electrochemical ammonia gas sensor is expected to have a good prospect.