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CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation
- CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation
- Bang, JH[Bang, Jin Ho]; Kim, H[Kim, Hasuck]
- DGIST Authors
- Kim, H[Kim, Hasuck]
- Issue Date
- Bulletin of the Korean Chemical Society, 32(10), 3660-3665
- Article Type
- Absorption; Absorption Spectroscopy; Active Oxygen Species; Alloy Catalyst; Alloys; Catalyst Activity; Catalytic Oxidation; Co Electro-Oxidation; Co Oxidation; Colloidal Methods; Cyclic Voltammetry; Density Functional Theory; Electrocatalysts; Electrocatalytic Activity; Electrochemical Studies; Electronic Properties; Electronic Structure; Electrooxidation; Enhanced Catalytic Activity; Facile Formation; Fuel Cell; Fuel Cell Catalysts; Fuel Cells; H2 Oxidation; Investments; Ionization of Gases; Molybdenum; Oxidation; Oxygen; Platinum; Platinum Alloys; PtMo Electrocatalyst; Spectroscopic Analysis; Synergetic Effect; Weak Interactions; X-Ray Absorption Spectroscopy; X Ray Absorption; X Ray Absorption Spectroscopy
- 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.
- Korean Chemical Society
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