INFIQC 05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Current transients for the hydrogen evolution reaction at high overpotentials on silver electrodes in acid solutions: Experiments and modelling
Autor/es:
ANDRES RUDERMAN; MARÍA FERNANDA JUAREZ; GERMÁN JOSÉ SOLDANO; LUCÍA B. AVALLE; GUILLERMO BELTRAMO; M. GIESEN; ELIZABETH SANTOS
Revista:
ELECTROCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 109 p. 403 - 410
ISSN:
0013-4686
Resumen:
The hydrogen evolution reaction has been investigated on Ag(1 0 0) by potentiostatic current transients at high overpotentials (η > 0.7 V) in acidic solutions. The reaction proceeds via the Volmer?Heyrovsky mechanism, simultaneously coupled with desorption of sulphate/disulphate anions. Volmer is the rate determined step, although the Heyrovsky reaction is only slightly faster. The kinetic parameters have been obtained under various conditions of pH and concentration of anions. A catalytic effect due to the presence of anions has been observed.
