Diffusion of adsorbed CO on platinum (100) and (111) oriented nanosurfaces

C. Coutanceau (1) , P. Urchaga (1) , G. Baranton (1)

1 Electrocatalyse

Platinum nanocubes exhibiting oriented surface domains were used to study the electrooxidation of chemisorbed CO (COchem.). The amount of oriented surface nanodomains was characterized by hydrogen underpotential deposition (H-upd), bismuth and germanium spontaneous adsorption/oxidation. The surface diffusion of COchem toward low coordination sites, where oxidation is expected to take place, is more rapid on (111) than on (100) nanodomains and no diffusion of CO from (100) domains toward (111) nanodomains seems to occur. (C) 2012 Elsevier B.V. All rights reserved.

Domaines: Catalyse; Chimie organique; Autre

C. Coutanceau, P. Urchaga, G. Baranton. Diffusion of adsorbed CO on platinum (100) and (111) oriented nanosurfaces. Electrochemistry Communications, 2012, 22, pp.109-112. ⟨10.1016/j.elecom.2012.06.002⟩. ⟨hal-00749878⟩