Influence of the Synthesis Method for Pt Catalysts Supported on Highly Mesoporous Carbon Xerogel and Vulcan Carbon Black on the Electro-Oxidation of Methanol

Platinum catalysts supported on carbon xerogel and carbon black (Vulcan) were synthesized with the aim of investigating the influence of the characteristics of the support on the electrochemical performance of the catalysts. Three synthesis methods were compared: an impregnation method with two diff...

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Bibliographic Details
Published in:Catalysts 2015-03, Vol.5 (1), p.392-405
Main Authors: Alegre, Cinthia, Gálvez, María, Moliner, Rafael, Lázaro, María
Format: Article
Language:English
Subjects:
Carbon
Carbon black
carbon xerogel
Catalysis
Catalysts
Chemical reactions
methanol electro-oxidation
Methyl alcohol
Oxidation
Pt catalysts
Synthesis
Xerogels
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Summary:Platinum catalysts supported on carbon xerogel and carbon black (Vulcan) were synthesized with the aim of investigating the influence of the characteristics of the support on the electrochemical performance of the catalysts. Three synthesis methods were compared: an impregnation method with two different reducing agents, sodium borohydride and formic acid, and a microemulsion method, in order to study the effect of the synthesis method on the physico-chemical properties of the catalysts. X-ray diffraction and transmission electron microscopy were applied. Cyclic voltammetry and chronoamperometry were used for studying carbon monoxide and methanol oxidation. Catalysts supported on carbon xerogel presented higher catalytic activities towards CO and CH3OH oxidation than catalysts supported on Vulcan. The higher mesoporosity of carbon xerogel was responsible for the favored diffusion of reagents towards catalytic centers.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal5010392