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Non-platinum oxygen reduction electrocatalysts based on carbon-supported metal-polythiophene composites

Title
Non-platinum oxygen reduction electrocatalysts based on carbon-supported metal-polythiophene composites
Authors
Han, Su JungJung, Hyun JungShim, Jun HoKim, Hyun-ChulSung, Shi-JoonYoo, BongLee, Dong HaLee, ChongmokLee, Youngmi
DGIST Authors
Kim, Hyun-Chul; Sung, Shi-Joon; Lee, Dong Ha
Issue Date
2011-05
Citation
Journal of Electroanalytical Chemistry, 655(1), 39-44
Type
Article
Article Type
Article
Keywords
Acidic ConditionsCatalyst ActivityCatalytic ActivityChemical PolymerizationComposite MaterialsElectrocatalystElectrocatalystsElectrocatalytic ActivityElectrolysisElectrolytic ReductionElectron TransferExchange Current DensitiesIridiumMetal-Polymer CompositeMetalsN ValueNon-PlatinumNumber of ElectronsOnset PotentialOxygenOxygen ReductionOxygen Reduction ReactionPalladiumPlatinumPoly-ThiophenePolymersPolythiopheneRotating Disk Electrode VoltammetryRotating DisksSuperior CatalystsSupported MetalsTafel PlotsTin
ISSN
1572-6657
Abstract
A series of carbon-supported metal-polythiophene composite (M-PTh/C) electrocatalysts are synthesized based on seven different non-Pt metals (M = Ir, Ru, Pd, Co, Fe, Ni, Sn) using chemical polymerization method. The electrocatalytic activity toward the oxygen reduction reaction (ORR) is characterized in acidic condition using rotating disk electrode voltammetry. Ir-, Ru-, and Pd-PTh/C show far more positive (ca. 700 mV) ORR onset potentials than Co-, Fe-, Ni-, and Sn-PTh/C. Further studies on the ORR kinetics are carried out for the three superior catalysts, Ir-, Ru-, Pd-PTh/C, using Koutecky-Levich and Tafel plots. The number of electrons (n) transferred in the ORR is ∼4 for these three catalysts, suggesting 4-electron transfer ORR is dominant. Considering all the obtained factors (such as the onset potential, n value, and exchange current density), Ir- and Ru-PTh/C catalysts are concluded to have relatively excellent ORR catalytic activity. © 2011 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3451
DOI
10.1016/j.jelechem.2011.02.012
Publisher
Elsevier
Related Researcher
Files:
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Collection:
Magnet-Controlled Materials Research Group1. Journal Articles
Convergence Research Center for Solar Energy1. Journal Articles
Convergence Research Center for Wellness1. Journal Articles


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