Intermetallic junction contribution to the CO electrooxidation on a Pt/Au electrode: the excess voltammetric current

G.C. LUQUE; M.R. GENNERO DE CHIALVO; A.C. CHIALVO

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (PRINT)

SPRINGER

Lugar: Berlin; Año: 2016 vol. 20 p. 1209 - 1214

1432-8488

The use of the excess voltammetric current for the evaluation of the role of the intermetallic junction of a Pt/Au electrode on the electrocatalytic activity of the carbon monoxide oxidation reaction (COOR) in alkaline solution is proposed. The experimental results showed that the Pt/Au heterojunction enhances the COOR in two potential regions, which was explained on the basis of the inversion in the direction of the spillover of the CO adatoms. This new type of bimetallic electrode characterized by a large ratio between the intermetallic junction and the electrode area can be an interesting alternative to be used in reactions involved in electrochemical energy conversion.