Electrochemically induced oxygen spillover and diffusion on Pt(111): PEEM imaging and kinetic modelling

Electrochemically induced oxygen spillover and diffusion in the Pt(O2)|YSZ system is investigated in a combined experimental and theoretical study. The spreading of spillover oxygen is imaged by photoelectron emission microscopy (PEEM) on dense and epitaxial Pt(111) thin film electrodes prepared by pulsed laser deposition (PLD). Two different models are used to obtain surface diffusion coefficients from the experimental data, (i) an analytical...