INIFTA 05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Facetted platinum electrocatalysts for electrochemical energy converters
Autor/es:
RAMOS SILVINA GABRIELA; MORENO SERGIO; ANDREASEN GUSTAVO; TRIACA WALTER
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2010 vol. 35 p. 5925 - 5929
ISSN:
0360-3199
Resumen:
The preparation and characterisation of Pt nanoparticles electrodeposited on carbon
substrates by pulsating electrolysis are presented. The characterisation studies of metal
electrodeposits by using SEM, TEM, XRD and cyclic voltammetry revealed the presence of
facetted Pt nanoparticles having a predominant (111) preferential crystal orientation. The
amount of electrodeposited Pt was determined by means of a spectrophotometric technique.
An improvement in performance of the hydrogen/oxygen PEM fuel cell with (111)-
type Pt nanoparticles incorporated in the cathode was observed, which was assigned to the
decrease of the blocking effect of the cathode electrode surface by intermediate peroxide
species produced during the overall oxygen electroreduction process.
