Author:
Nagle Lorraine C.,Garbarino Sebastian,Burke Declan
Abstract
The electrocatalytic properties of palladium are of interest in connection with direct formic acid fuel cell development. Cyclic voltammograms recorded for activated palladium electrodes in sulphuric acid solution exhibit a quasi-reversible surface redox transition at ca. 0.25 V (RHE) and, in the presence of formic acid, the oxidation of the latter undergoes a dramatic change in rate at the same potential. Catalysis in this case evidently involves surface active site behaviour, low coverage protruding palladium species undergoing oxidation in a repetitive manner, the resulting surface cations coordinating bisulphate anions and acting as mediators for the formic acid oxidation reaction.
Publisher
The Electrochemical Society
Cited by
8 articles.
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