Author:
Martín Antonio J.,Chaparro Antonio M.,Daza Loreto
Abstract
The electrodeposition process of WO3 and Pt-WO3 from acid solution has been investigated by means of Electrochemical Quartz Crystal Microbalance. Cyclic potential sweeps on Au substrate show that WO3 is a complex process with at least 5 different growth regimes, combining electrochemical and non electrochemical processes. Substoichiometric oxides and bronzes formation are involved in the deposition processes. When both Pt and WO3 precursors are present, Pt deposition is favoured and interaction between Pt and WO3 bronzes may explain this behaviour. Oxygen reduction (ORR) experiments on Pt-WO3 electrodeposited on glassy carbon and WO3 reveal high catalytic activity compared with platinum alone.
Publisher
The Electrochemical Society
Cited by
5 articles.
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