Synthesis and characterization of nanostructured Pb-Co-Sn film for the oxygen evolution reaction in sulfuric acid media

Autor: Claudia Carrasco, Sebastian Slawik, Pablo Tobosque, Erenilton Pereira da Silva, Marisol Maril, Nataly Cisternas, Jean-Luc Delplancke, Marie-Paule Delplancke, Haroldo Cavalcanti Pinto, Carolina Lara
Rok vydání: 2021
Předmět:
Zdroj: Journal of Nanoparticle Research. 23
ISSN: 1572-896X
1388-0764
DOI: 10.1007/s11051-021-05240-2
Popis: Pb-Co anodes have been considered an attractive candidate for oxygen evolution reaction (OER) applications due to their low overpotential to catalyze the OER and its low cost. Despite these characteristics, their efficiency to produce oxygen at high current densities is low. In this work, we report a Pb-Co-Sn film with enhanced efficiency and improved electrocatalytic properties. Pulsed cathodic electrodeposition was used to develop Pb-Co-Sn films at different deposition times among 2 and 10 min. Polarization curves were recorded to determine the deposition parameters. Morphological studies showed that the films grown for 6 min exhibited a well-covered and homogeneous surface. Structural analyses were recorded employing X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) that showed a nanostructured film composed by Pb and CoSn2 nanocrystallites. The electrochemical behavior of the developed Pb-Co-Sn films was measured by polarization curves in a sulfuric acid solution demonstrating a great ability to catalyze the OER: a reduction of the overpotential by 55% and 8.5% versus a Pb-Ca-Sn anode and Pb-Co film, respectively, accompanied by a strong increase in the current density. Thus, the addition of tin to the anode has a positive effect on the electrocatalytic performance of the film.
Databáze: OpenAIRE
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