Fundamental Study of Adsorbed Intermediates of the Pt-Catalysed Oxygen Reduction Reaction

本研究的最初目标是将微电极的工作扩展到多晶Pt宏电极，以建立与Oads还原相关的Pt比电荷密度。微电极具有独特的性能，促进了Oads的发现，但这些物种现在已被观察到使用循环伏安法在旋转盘电极（RDE），显示出剥离峰的表面结合物种的还原特性。这一观察结果可以使在真实的LTFC催化剂的Oads的研究，使用良好建立的催化剂沉积在RDE上的方法。1本报告讨论了在宏电极上获得的结果，这些结果支持了以前的结论，并说明了电分析中基本技术的灵敏度。

The initial objectives of this study have been to extend the work on microelectrodes to polycrystalline Pt macroelectrodes to establish a Pt-specific charge density associated with the reduction of Oads. Microelectrodes possess unique properties which facilitated the discovery of Oads but these species have now been observed using cyclic voltammetry at rotating disc electrodes (RDE), displaying a stripping peak characteristic of the reduction of surface-bound species. This observation could enable the study of Oads at real LTFC catalysts using well established methodologies for catalyst deposition on RDE. 1This presentation discusses the results obtained at macroelectrodes which support previous conclusions, and illustrates the sensitivity of fundamental techniques in electroanalysis.