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

这项研究的最初目标是将微电极的工作扩展到多晶铂大电极，以建立与减少OAD相关的铂特定电荷密度。微电极具有独特的性质，促进了OAD的发现，但目前已在旋转圆盘电极(RDE)上用循环伏安法观察到这些物种，显示出表面结合物种还原的溶出峰特征。这一观察结果可以使在真实的LTFC催化剂上使用成熟的催化剂沉积方法来研究OAD成为可能。1本报告讨论了在大电极上获得的支持先前结论的结果，并说明了电分析中基本技术的敏感性。

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.