Hydrogen oxidation and hydrogen evolution on a platinum electrode in acetonitrile

Isis Ledezma-Yanez, Oscar Díaz-Morales, Marta C. Figueiredo, Marc T.M. Koper (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

13 Citaten (Scopus)

Samenvatting

This work discusses the kinetics of the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) on a polycrystalline platinum electrode in acetonitrile, in presence of two different electrolytes. Our findings indicate the sensitivity of the kinetics of these reactions to the presence of small amounts of water. Insitu FTIR spectroscopy reveals the ion migration owing to the preferential solvation of protons by residual water, whereas surface-enhanced Raman spectroscopy confirms that the water leaves the interface under hydrogen oxidation conditions. These observations imply that the kinetic sensitivity of this electrocatalytic reaction towards the preferential solvation processes presents a serious constraint in the establishment of a reference electrode for nonaqueous solvents based on HOR/HER on platinum, and on the comparison of its catalysis in various nonaqueous solvents.

Originele taal-2Engels
Pagina's (van-tot)1612-1622
Aantal pagina's11
TijdschriftChemElectroChem
Volume2
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - 1 okt 2015
Extern gepubliceerdJa

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