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CO Adsorption Behavior on Decorated Pt@Au Nanoelectrocatalysts: A Combined Experimental and DFT Theoretical Calculation Study

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Yaolun Yu†, Kok Hwa Lim†, Jing Yuan Wang‡, and Xin Wang*†

^†Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, and ^‡Residues and Resource Reclamation Centre, Nanyang Technological University, Singapore 637459, Singapore

J. Phys. Chem. C, 2012, 116 (5), pp 3851–3856

DOI: 10.1021/jp210851b

Publication Date (Web): December 28, 2011

*E-mail: wangxin@ntu.edu.sg. Fax: +65 67947553.

Section:

Electrochemistry

Abstract

CO stripping experiments were carried out on a series of submonolayer decorated Pt@Au/C electrocatalysts with different Pt surface coverages which were synthesized by the Cu underpotential deposition (UPD)-Pt redox replacement technique. Combined with density functional theory calculations, the correlation between the CO adsorption strength and surface morphology of the catalyst is well illustrated. Results showed that whether the surface Pt atom could form a PtPt surface ensemble with another neighboring Pt atom is critical, which determines CO adsorption and oxidation behaviors on the electrocatalyst.

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History

Published In Issue February 09, 2012
Article ASAPJanuary 27, 2012
Just Accepted ManuscriptDecember 28, 2011
Received: November 10, 2011
Revised: December 19, 2011

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CO Adsorption Behavior on Decorated Pt@Au Nanoelectrocatalysts: A Combined Experimental and DFT Theoretical Calculation Study