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CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation

Title
CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation
Authors
Bang, JH[Bang, Jin Ho]Kim, H[Kim, Hasuck]
DGIST Authors
Kim, H[Kim, Hasuck]
Issue Date
2011-10-20
Citation
Bulletin of the Korean Chemical Society, 32(10), 3660-3665
Type
Article
Article Type
Article
Keywords
AbsorptionAbsorption SpectroscopyActive Oxygen SpeciesAlloy CatalystAlloysCatalyst ActivityCatalytic OxidationCo Electro-OxidationCo OxidationColloidal MethodsCyclic VoltammetryDensity Functional TheoryElectrocatalystsElectrocatalytic ActivityElectrochemical StudiesElectronic PropertiesElectronic StructureElectrooxidationEnhanced Catalytic ActivityFacile FormationFuel CellFuel Cell CatalystsFuel CellsH2 OxidationInvestmentsIonization of GasesMolybdenumOxidationOxygenPlatinumPlatinum AlloysPtMo ElectrocatalystSpectroscopic AnalysisSynergetic EffectWeak InteractionsX-Ray Absorption SpectroscopyX Ray AbsorptionX Ray Absorption Spectroscopy
ISSN
0253-2964
Abstract
CO-tolerant PtMo/C alloy electrocatalyst was prepared by a colloidal method, and its electrocatalytic activity toward CO oxidation was investigated. Electrochemical study revealed that the alloy catalyst significantly enhanced catalytic activity toward the electro-oxidation of CO compared to Pt/C counterpart. Cyclic voltammetry suggested that Mo plays an important role in promoting CO electro-oxidation by facilitating the formation of active oxygen species. The effect of Mo on the electronic structure of Pt was investigated using X-ray absorption spectroscopy to elucidate the synergetic effect of alloying. Our in-depth spectroscopic analysis revealed that CO is less strongly adsorbed on PtMo/C catalyst than on Pt/C catalyst due to the modulation of the electronic structure of Pt d-band. Our investigation shows that the enhanced CO electrooxidation in PtMo alloy electrocatalyst is originated from two factors; one comes from the facile formation of active oxygen species, and the other from the weak interaction between Pt and CO.
URI
http://hdl.handle.net/20.500.11750/3431
DOI
10.5012/bkcs.2011.32.10.3660
Publisher
Korean Chemical Society
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles


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