INVESTIGADORES
CALVO Ernesto Julio
artículos
Título:
Effect of porosity and active area on the assessment of catalytic activity of non-precious metal electrocatalyst for oxygen reduction
Autor/es:
DAVIA, FEDERICO GABRIEL; FERNÁNDEZ, CYNTHIA CAROLINA; WILLIAMS, FEDERICO JOSÉ; CALVO, ERNESTO JULIO
Revista:
JOURNAL OF PHYSICS CONDENSED MATTER
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2021 vol. 33 p. 324001 - 324014
ISSN:
0953-8984
Resumen:
We describe a method to study porous thin-films deposited onto rotating disc electrodes (RDE)applied to non-platinum group electrocatalyst obtained by pyrolysis of iron phthalocyanineand carbon, FePc/C. The electroactive area and porous properties of the thin film electrodeswere obtained using electrochemical impedance spectroscopy under the framework of deLevie impedance model. The electrocatalytic activity of different electrodes was correlated tothe total electroactive area (Ap) and the penetration ratio parameter through the film under accurrent. The cylindrical pore model was extended to the RDE boundary conditions and derivedin a Koutecky?Levich type expression that allowed to separate the effect of the electroactivearea and structural properties. The resulting specific electrocatalytic activity of FePc/C heattreated at different temperatures was correlated to FePc surface concentration.
