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Carbon-supported PdSn and Pd3Sn2 anodes for glucose electrooxidation in alkaline media

Paper ID Volume ID Publish Year Pages File Format Full-Text
45872 46426 2014 8 PDF Available
Title
Carbon-supported PdSn and Pd3Sn2 anodes for glucose electrooxidation in alkaline media
Abstract

•Pd3Sn2/C presents high activity for glucose electrooxidation.•Addition of Sn enhances catalytic activity towards glucose electrooxidation.•Sn content more than 43 at% drops the catalytic efficiency.•Increasing temperature until 40 °C catalytic activity is enhanced.

PdSn (20 wt.%) and Pd3Sn2 (20 wt.%) nanoparticles supported on Vulcan XC-72 carbon powders are prepared by a modified microwave-assisted polyol method and studied for the reaction of glucose electrooxidation in alkaline media. The as-prepared electrocatalysts are characterized by X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Cyclic Voltammetry (CV) and Chronoamperometry (CA). For comparison reasons, Pd/C (20 wt%) is also prepared. According to the CV results, the electrochemical active surface areas (EASA) were in the following order: Pd3Sn2/C > PdSn/C > Pd/C (28.8, 22.8 and 10.3 m2 g−1). It is found that for glucose electrooxidation, at room temperature Pd3Sn2/C exhibited the highest electrocatalytic activity, 3.64 mA cm−2, which is increased up to 5.7 mA cm−2, as the temperature increases to 40 °C. The effect of concentration of both electrolyte and glucose on the activity is also studied and it is observed that the increase of the amount of both electrolyte and glucose enhances the rate of glucose electrooxidation. Additionally, from the chronoamperometric results, the diffusion coefficients of glucose are calculated to be 7.9 × 10−5, 3.9 × 10−5 and 4.2 × 10−5 cm2 s−1 for Pd3Sn2/C, PdSn/C and Pd/C, respectively.

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Keywords
Glucose electrooxidation; Alkaline media; PdxSny/C electrocatalysts; Direct glucose fuel cells
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Carbon-supported PdSn and Pd3Sn2 anodes for glucose electrooxidation in alkaline media
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 158–159, October 2014, Pages 209–216
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