“…Fig. 7 Comparison of oxygen surface diffusion coefficients at higher (a) Polycrystalline Pt, TDS, 47 (b) Pt(111), V WR = 0.2 V, PEEM, 12,13 (c) this study, Fickian diffusion model, filled dots: x = 55 mm, empty dots: x = 27.5 mm, (d) this study, reaction-diffusion model, (e) Pt(100), y o 0.2, PEEM, 26 (f) Pt(100), 0.2 o y o 0.7, PEEM, 26 (g) Pt(111), FEM,50 (h) Pt(100), FEM,47 and (i) Pt(111), STM 48. …”