Work function changes and electrochemical pumping of platinum electrodes on yttrium stabilized zirconia
Work function changes and electrochemical pumping of platinum electrodes on yttrium stabilized zirconia
复制标题
钇稳定氧化锆上铂电极的功函数变化和电化学泵浦
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
R. Imbihl
中科院分区：
文献类型：
--
作者：
T. Neubrand;S. Günther;A. Fenske;R. Imbihl
用开尔文探针和光电显微镜分别研究了电化学泵送在钇稳定氧化锆（YSZ）上多孔Pt电极上引起的功函数（WF）变化。测量结果的比较表明，除了氧气表面扩散的真正溢出外，静电效应也存在。这些静电效应产生于并非多孔金属电极的所有部分都处于电接触的事实，这有助于用开尔文探针测量WF信号。不同制备方式的Pt电极实验表明，多孔金属电极的制备对静电贡献有较大影响。
The work function (WF) changes which are induced by electrochemical pumping on porous Pt electrodes on yttrium stabilized zirconia (YSZ) have been studied with a Kelvin probe as an integral and a photoemission electron microscope as a spatially resolving method, respectively. The comparison of the measurements demonstrates that besides true spillover via surface diffusion of oxygen, electrostatic effects are also present. These electrostatic effects arising from the fact that not all parts of a porous metal electrode are in electrical contact contribute to the WF signal measured with a Kelvin probe. Experiments with Pt electrodes prepared differently show that the preparation of the porous metal electrodes has a strong influence on the electrostatic contribution.