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Pt-CeO2/C anode catalyst for direct methanol fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
48219 46496 2008 10 PDF Available
Title
Pt-CeO2/C anode catalyst for direct methanol fuel cells
Abstract

In order to develop a cheaper and durable catalyst for methanol electrooxidation reaction, ceria (CeO2) as a co-catalytic material with Pt on carbon was investigated with an aim of replacing Ru in PtRu/C which is considered as prominent anode catalyst till date. A series of Pt-CeO2/C catalysts with various compositions of ceria, viz. 40 wt% Pt-3–12 wt% CeO2/C and PtRu/C were synthesized by wet impregnation method. Electrocatalytic activities of these catalysts for methanol oxidation were examined by cyclic voltammetry and chronoamperometry techniques and it is found that 40 wt% Pt-9 wt% CeO2/C catalyst exhibited a better activity and stability than did the unmodified Pt/C catalyst. Hence, we explore the possibility of employing Pt-CeO2 as an electrocatalyst for methanol oxidation. The physicochemical characterizations of the catalysts were carried out by using Brunauer Emmett Teller (BET) surface area and pore size distribution (PSD) measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) techniques. A tentative mechanism is proposed for a possible role of ceria as a co-catalyst in Pt/C system for methanol electrooxidation.

Keywords
CeO2-modified Pt/C catalyst; Cyclic voltammetry; Methanol oxidation; Direct methanol fuel cell
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Pt-CeO2/C anode catalyst for direct methanol fuel cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 84, Issues 3–4, 1 December 2008, Pages 773–782
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us