Mapping Electrochemical Heterogeneity at Gold Surfaces: A Second Harmonic Imaging Study.

ABSTRACT: Designing efficient catalysts requires correlating surface structure and local chemical composition with reactivity on length scales from nanometers to tens of microns. While much work has been done on this structure/function correlation on single crystals, comparatively little has been done for catalysts of relevance in applications. Such materials are typically highly heterogeneous and thus require methods that allow mapping of the structure/function relationship during electrochemical conversion. Here, we use optical second harmonic imaging combined with cyclic voltammetry to map the surface of gold nanocrystalline and polycrystalline electrodes during electrooxidation and to quantify the spatial extent of surface reconstruction during potential cycling. The wide-field configuration of

SUBMITTER: Nahalka I 

PROVIDER: S-EPMC9182208 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature