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Ordered mesoporous tungsten carbide nanoplates as non-Pt catalysts for oxygen reduction reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
39712 45832 2014 7 PDF Available
Title
Ordered mesoporous tungsten carbide nanoplates as non-Pt catalysts for oxygen reduction reaction
Abstract

•The mesoporous WC were synthesized using mesoporous W2N nanoparticles as a template.•The mesoporous WC shows fairly monomodal pore size distribution.•The Pd/WC-900-m exhibits enhanced electro-oxygen reduction activity and stability.

We represent well-defined mesoporous tungsten carbide catalysts for oxygen reduction reaction in alkaline solution. The pore structures of tungsten carbide nanoplates (WC-700-m, WC-800-m and WC-900-m) are formed as a function of reaction temperature of 700, 800 and 900 °C in CH4(25%)/H2(75%) atmosphere for 9 h using layered tungsten nitride nanoparticles. All the tungsten carbide nanoplates exhibit isothermal sorption characteristics of mesoporous structure and fairly monomodal pore size distribution in the range of 6.6–7.2 nm. The WC-700-m, WC-800-m, and WC-900-m exhibit X-ray diffraction patterns corresponding to WC1−x, WC1−x + WC, and WC phase, respectively. In particular, the WC-900-m shows highly improved electrocatalytic activity toward oxygen reduction reaction in an alkaline solution as compared to the WC-900-c. Furthermore, the WC-900-m supported Pd catalyst as a non-Pt exhibits much enhanced electrochemical oxygen reduction properties in comparison with conventional Pt catalyst.

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Keywords
Mesoporous; Tungsten carbide; Palladium; Oxygen reduction reaction; Electrochemical properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 477, 5 May 2014, Pages 102–108
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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