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Electrochemical characterization of Pt-CeO2/C and Pt-CexZr1−xO2/C catalysts for ethanol electro-oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
48695 46518 2007 6 PDF Available
Title
Electrochemical characterization of Pt-CeO2/C and Pt-CexZr1−xO2/C catalysts for ethanol electro-oxidation
Abstract

Pt-CeO2/C and a series of Pt-CexZr1−xO2/C catalyst powders with different Ce/Zr ratio were prepared and evaluated in terms of the electrochemical activity for ethanol electro-oxidation using cyclic voltammetry (CV), steady state polarization experiments and CO-stripping technique at room temperature. XRD results show that CexZr1−xO2 and Pt coexist in the Pt-CexZr1−xO2/C catalyst and CexZr1−xO2 has no effect on the crystalline lattice of Pt. TEM results show that the Pt and CexZr1−xO2 particles dispersed uniformly over the surface of the carbon black. Cyclic voltammetry results show that the mass activity and specific activity of Pt-CeO2/C for ethanol electro-oxidation is higher than that of Pt/C. The structure and Ce/Zr ratio of Pt-CexZr1−xO2/C has effect on the catalytic activity of catalysts. CO-stripping voltammetry showed that the inclusion of CeO2 and CexZr1−xO2 favors the CO oxidation at lower potential.

Keywords
Ethanol electro-oxidation; Electrocatalyst; CexZr1−xO2; Pt-CexZr1−xO2/C; Direct ethanol fuel cells
First Page Preview
Electrochemical characterization of Pt-CeO2/C and Pt-CexZr1−xO2/C catalysts for ethanol electro-oxidation
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 73, Issues 1–2, 24 April 2007, Pages 144–149
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis