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Adsorption-Driven Surface Segregation of the Less Reactive Alloy Component
Abstract
Counterintuitive to expectations and all prior observations of adsorbate-induced surface segregation of the more reactive alloy component (the one forming the stronger bond with the adsorbate), we show that CO adsorption at elevated pressures and temperatures pulls the less reactive Cu to the surface of a CuPt near-surface alloy. The Cu surface segregation is driven by the formation of a stable self-organized CO/CuPt surface alloy structure and is rationalized in terms of the radically stronger Pt-CO bond when Cu is present in the first surface layer of Pt. The results, which are expected to apply to a range of coinage (Cu, Ag)/Pt-group bimetallic surface alloys, open up new possibilities in selective and dynamical engineering of alloy surfaces for catalysis.
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Cites
Computational high-throughput screening of electrocatalytic materials for hydrogen evolution
Greeley, J., Jaramillo, T. F., Bonde, J., Chorkendorff, I., & Nørskov, J. K. (2006) · Nature Materials · doi:10.1038/nmat1752 · Cited by 4,097
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Cited by
Design of electrocatalysts for oxygen- and hydrogen-involving energy conversion reactions
Jiao, Y., Zheng, Y., Jaroniec, M., & Qiao, S. Z. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00470a · Cited by 5,388
Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction
Nie, Y., Li, L., & Wei, Z. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00484a · Cited by 2,156
Review of Pt-Based Bimetallic Catalysis: From Model Surfaces to Supported Catalysts
Yu, W., Porosoff, M. D., & Chen, J. G. (2012) · Chemical Reviews · doi:10.1021/cr300096b · Cited by 1,253
Platinum-Based Oxygen Reduction Electrocatalysts
Wu, J., & Yang, H. (2013) · Accounts of Chemical Research · doi:10.1021/ar300359w · Cited by 1,050
Synthesis of colloidal metal and metal alloy nanoparticles for electrochemical energy applications
You, H., Yang, S., Ding, B., & Yang, H. (2013) · Chem. Soc. Rev. · doi:10.1039/c2cs35319a · Cited by 560
Metadata
- Authors
- Andersson, K. J., Calle-Vallejo, F., Rossmeisl, J., & Chorkendorff, I.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-01-23
- Volume
- 131
- Issue
- 6
- Pages
- 2404-2407
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2034568303
- Cited by
- 188
- References
- 1
- FWCI
- 7.18
- Type
- journal article
- Language
- en
- Open access
- closed
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