Proton-conducting oxide with redox protonation and its application to a hydrogen sensor with a self-standard electrode
Proton-conducting oxide with redox protonation and its application to a hydrogen sensor with a self-standard electrode
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DOI：
10.1039/c5ra23560j
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发表时间：
2016-04
期刊：
影响因子：
3.9
通讯作者：
Yuji Okuyama;S. Nagamine;A. Nakajima;G. Sakai;N. Matsunaga;Fusako Takahashi;Kimata Koji;T. Oshima;Tsuneyoshi Koji
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文献类型：
--
作者：
Yuji Okuyama;S. Nagamine;A. Nakajima;G. Sakai;N. Matsunaga;Fusako Takahashi;Kimata Koji;T. Oshima;Tsuneyoshi Koji
为了简化使用质子导体作为电解质的电动势型氢传感器的结构，开发了在空气中用作自标准电极的电解质。通过交流阻抗分析、电动势测量、红外吸收光谱分析和电子顺磁共振（ESR）测量等方法研究了Mn掺杂CaZrO 3的电化学性能和质子溶解机理。Mn掺杂的CaZrO 3通过锰离子的还原从氢获得质子。5mol%Mn掺杂的CaZrO 3在还原性气氛中表现出质子传导，在氧化性气氛中表现出空穴传导。使用CaZr0.95Mn0.05O3−δ作为电解质的气体浓差电池被构造用作氢传感器。当以空气为参比气体时，发现它仅依赖于工作电极的氢电位。
In order to simplify the structure of the EMF-type hydrogen sensor using a proton conductor as the electrolyte, an electrolyte serving as a self-standard electrode in air was developed. The electrochemical properties and proton dissolution mechanism of Mn-doped CaZrO3 were evaluated by impedance analysis, EMF measurement, IR absorption analysis and ESR measurement. Mn-doped CaZrO3 acquires a proton from hydrogen by reduction of the manganese ion. 5 mol% Mn doped CaZrO3 showed proton conduction in a reducing atmosphere and hole conduction in an oxidizing atmosphere. A gas concentration cell using CaZr0.95Mn0.05O3−δ as the electrolyte was constructed for use as a hydrogen sensor. It was found to be dependent only on the hydrogen potential of the working electrode when air was used as the reference gas.