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Preparation of Pd–Au/C catalysts with different alloying degree and their electrocatalytic performance for formic acid oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
47129 46459 2011 6 PDF Available
Title
Preparation of Pd–Au/C catalysts with different alloying degree and their electrocatalytic performance for formic acid oxidation
Abstract

The carbon-supported Pd–Au catalysts (Pd–Au/C) with different alloying degree are prepared in the aqueous solution with and without tetrahydrofuran (THF) by a chemical reduction method. The studies of X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) measurements show that the alloying degree of the Pd–Au/C catalyst prepared in the aqueous solution is much lower than that of Pd–Au/C catalyst prepared in the H2O/tetrahydrofuran (THF) mixture solution, indicating the presence of THF can obviously enhance the alloying degree of Pd–Au nanoparticles during the preparation of Pd–Au/C catalyst. The electrochemical measurements illustrate the electrocatalytic activity of Pd–Au/C catalyst for the formic acid electrooxidation is strongly dependent on alloying degree of Pd–Au nanoparticles. The Pd–Au/C catalyst with high alloying degree shows a higher electrocatalytic activity and stability for the formic acid electrooxidation compared to the Pd–Au/C catalyst with low alloying degree, which can be ascribed to enhancement of CO tolerance and possible suppression of dehydration pathway in the course of formic acid electrooxidation.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ THF can obviously enhance the alloying degree of Pd–Au nanoparticles during the preparation of Pd–Au/C catalyst. ▶ The addition of Au could decrease the adsorption strength of CO on Pd, and promote the electrocatalytic oxidation of formic acid, especially when the alloyed Au is introduced. ▶ The electrocatalytic activity of Pd–Au/C catalyst for the formic acid electrooxidation is strongly dependent on alloying degree of Pd–Au nanoparticles. The Pd–Au/C catalyst with high alloying degree shows a higher electrocatalytic activity and stability for the formic acid electrooxidation.

Keywords
Pd–Au/C catalyst; Alloy; Formic acid; Oxidation; Electrocatalytic performance
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Preparation of Pd–Au/C catalysts with different alloying degree and their electrocatalytic performance for formic acid oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 102, Issues 3–4, 22 February 2011, Pages 614–619
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