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Crotonaldehyde Adsorption on Cu-Pt Surface Alloys: A Quantum Mechanics Study. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
The adsorption of crotonaldehyde on Cu-Pt alloy surfaces was characterized by density functional theory (DFT). Two surfaces were considered: Cu2Pt/Cu(111) and Cu3Pt/Cu(111). It was determined that the presence of Pt on the surface, even when isolated as single atoms fully surrounded by Cu, provides additional stability for the adsorbates, increasing the magnitude of the adsorption energy by as much as 40 kJ/mol. The preferred bonding on both surfaces is via multiple coordination, with the most stable configuration being a cis arrangement with di-σ bonding of the C=O bond across a Cu–Cu bridge and an additional π bonding to a Pt atom. The fact that Pt significantly affects the adsorption of unsaturated aldehydes such as crotonaldehyde explains why the kinetics of their hydrogenation using single-atom alloy (SAA) catalysts vary with alloy composition, as we previously reported, and brings into question the simple model in which the role of Pt is only to promote the dissociation of H2.
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Nayakasinghe MT, Ponce Perez R, Chen B, Takeuchi N, Zaera F. Adsorption, thermal conversion, and catalytic hydrogenation of acrolein on Cu surfaces. J Catal 2022. [DOI: 10.1016/j.jcat.2022.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sykes ECH, Christopher P, Li J. Fundamental insights into heterogeneous single-atom catalysis. J Chem Phys 2021; 155:210401. [PMID: 34879660 DOI: 10.1063/5.0073628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- E Charles H Sykes
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Phillip Christopher
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, USA
| | - Jun Li
- Department of Chemistry, Tsinghua University, Beijing 100084, China and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
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Luo L, Yuan F, Zaera F, Zhu Y. Catalytic hydrogenation of furfural to furfuryl alcohol on hydrotalcite-derived CuxNi3−xAlOy mixed-metal oxides. J Catal 2021. [DOI: 10.1016/j.jcat.2021.10.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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