AVS 62nd International Symposium & Exhibition
    In-Situ Spectroscopy and Microscopy Focus Topic Tuesday Sessions
       Session IS+AS+SA+SS-TuM

Invited Paper IS+AS+SA+SS-TuM10
In situ Single-molecule Microscopy of Photoelectrocatalysis for Solar Water Oxidation

Tuesday, October 20, 2015, 11:00 am, Room 211C

Session: In-situ Studies of Solid-liquid Interfaces
Presenter: Peng Chen, Cornell University
Correspondent: Click to Email

This talk will present our recent results in using single-molecule super-resolution fluorescence microscopy to image photoelectrochemical reactions on single semiconductor nanostructures in situ under photoelectrochemical water oxidation conditions. We separately image hole and electron induced reactions, driven by light and electrochemical potential, and map the reactions at single reaction temporal resolution and nanometer spatial resolution. We also correlate the surface hole and electron reactivity with the local water oxidation efficiency using sub-particle level photocurrent measurements. By depositing oxygen evolution catalysts in a spatially controlled manner, we further identify the optimal sites for catalyst deposition for photocurrent enhancement and onset potential reduction.