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Guba M, Höltzl T. Stability and Electronic Structure of Nitrogen-Doped Graphene-Supported Cu n ( n = 1-5) Clusters in Vacuum and under Electrochemical Conditions: Toward Sensor and Catalyst Design. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:4677-4686. [PMID: 38533239 PMCID: PMC10961840 DOI: 10.1021/acs.jpcc.3c06475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 03/28/2024]
Abstract
Here, we present a detailed computational study of the stability and the electronic structure of nitrogen-doped graphene (N4V2) supported Cun (n = 1-5) clusters, which are promising carbon-dioxide electroreduction catalysts. The binding of the clusters to the nitrogen-doped graphene and the electronic structure of these systems were investigated under vacuum and electrochemical conditions. The stability analysis showed that among the systems, the nitrogen-doped graphene bound Cu4 is the most stable in vacuum, while in an electrolyte, and at a negative potential, the N4V2-Cu3 is energetically more favorable. The ground state electronic structure of the nitrogen-doped graphene substrate undergoes topological phase transition, from a semimetallic state, and we observed a metallic and topologically trivial state after the clusters are deposited. The electrode potential adjusts the type and density of the charge carriers in the semimetallic models, while the structures containing copper exhibit bands which are deformed and relaxed by the modified number of electrons.
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Affiliation(s)
- Márton Guba
- Department
of Inorganic and Analytical Chemistry and HUN-REN-BME Computation
Driven Chemistry Research Group, Budapest
University of Technology and Economics, Szent Gellért tér 4, Budapest H-1111, Hungary
| | - Tibor Höltzl
- Department
of Inorganic and Analytical Chemistry and HUN-REN-BME Computation
Driven Chemistry Research Group, Budapest
University of Technology and Economics, Szent Gellért tér 4, Budapest H-1111, Hungary
- Nanomaterials
Science Group, Furukawa Electric Institute
of Technology, Késmárk
utca 28/A, Budapest H-1158, Hungary
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Zamora B, Nyulászi L, Höltzl T. CO 2 and H 2 Activation on Zinc-Doped Copper Clusters. Chemphyschem 2024; 25:e202300409. [PMID: 38057146 DOI: 10.1002/cphc.202300409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 10/25/2023] [Indexed: 12/08/2023]
Abstract
Here we systematically investigate the CO2 and H2 activation and dissociation on small Cun Zn0/+ (n=3-6) clusters using Density Functional Theory. We show that Cu6 Zn is a superatom, displaying an increased HOMO-LUMO gap and is inert towards CO2 or H2 activation or dissociation. While other neutral clusters weakly activate CO2 , the cationic clusters preferentially bind the CO2 in monodentate nonactivated way. Notably, Cu4 Zn allows for the dissociation of activated CO2 , whereas larger clusters destabilize all activated CO2 binding modes. Conversely, H2 dissociation is favored on all clusters examined, except for Cu6 Zn. Cu3 Zn+ and Cu4 Zn, favor the formation of formate through the H2 dissociation pathway rather than CO2 dissociation. These findings suggest the potential of these clusters as synthetic targets and underscore their significance in the realm of CO2 hydrogenation.
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Affiliation(s)
- Bárbara Zamora
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, 1111-, Budapest, Műegytem rkp 3, Hungary
| | - László Nyulászi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, 1111-, Budapest, Műegytem rkp 3, Hungary
- HUN-REN-BME Computation Driven Chemistry research group, 1111-, Budapest, Műegytem rkp. 3, Hungary
| | - Tibor Höltzl
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, 1111-, Budapest, Műegytem rkp 3, Hungary
- HUN-REN-BME Computation Driven Chemistry research group, 1111-, Budapest, Műegytem rkp. 3, Hungary
- Furukawa Electric Institute of Technology, Nanomaterials Science Group, 1158, Budapest, Késmárk utca 28/A, Hungary
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Bai L, Wang Y, Han Z, Bai J, Leng K, Zheng L, Qu Y, Wu Y. Efficient industrial-current-density acetylene to polymer-grade ethylene via hydrogen-localization transfer over fluorine-modified copper. Nat Commun 2023; 14:8384. [PMID: 38104169 PMCID: PMC10725425 DOI: 10.1038/s41467-023-44171-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 12/04/2023] [Indexed: 12/19/2023] Open
Abstract
Electrocatalytic acetylene semi-hydrogenation to ethylene powered by renewable electricity represents a sustainable pathway, but the inadequate current density and single-pass yield greatly impedes the production efficiency and industrial application. Herein, we develop a F-modified Cu catalyst that shows an industrial partial current density up to 0.76 A cm-2 with an ethylene Faradic efficiency surpass 90%, and the maximum single-pass yield reaches a notable 78.5%. Furthermore, the Cu-F showcase the capability to directly convert acetylene into polymer-grade ethylene in a tandem flow cell, almost no acetylene residual in the production. Combined characterizations and calculations reveal that the Cuδ+ (near fluorine) enhances the water dissociation, and the generated active hydrogen are immediately transferred to Cu0 (away from fluorine) and react with the locally adsorbed acetylene. Therefore, the hydrogen evolution reaction is surpassed and the overall acetylene semi-hydrogenation performance is boosted. Our findings provide new opportunity towards rational design of catalysts for large-scale electrosynthesis of ethylene and other important industrial raw.
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Affiliation(s)
- Lei Bai
- International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, Shaanxi, China
| | - Yi Wang
- International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, Shaanxi, China
| | - Zheng Han
- International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, Shaanxi, China
| | - Jinbo Bai
- Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS, LMPS-Laboratoire de Mécanique Paris-Saclay, 8-10 rue Joliot-Curie, Gif-sur-Yvette, 91190, France
| | - Kunyue Leng
- International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, Shaanxi, China.
| | - Lirong Zheng
- Institute of High Energy Physics, 100039, Beijing, China.
| | - Yunteng Qu
- International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, Shaanxi, China.
| | - Yuen Wu
- School of Chemistry and Materials Science, University of Science and Technology of China, 230026, Hefei, China
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Li Y, Wang D. Ab Initio Molecular Dynamics Study of H 2 Dissociation Mechanisms on Cu 13 and Defective Graphene-supported Cu 13 Clusters: Active Sites, Energy Barriers and Adsorption States. Chemphyschem 2023; 24:e202300369. [PMID: 37439149 DOI: 10.1002/cphc.202300369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/14/2023]
Abstract
Ab initio molecular dynamics calculations were performed to study H2 dissociation mechanisms on Cu13 and defective graphene-supported Cu13 clusters. The study reveals that seven types of corresponding dissociation processes are found on the two clusters. The average dissociation energy barriers are 0.51 eV on the Cu13 cluster and 0.12 eV on the defective graphene-supported Cu13 cluster, which are lowered by ~19 % and ~81 % compared with the pristine Cu(111) surface, respectively. Furthermore, compared with the pure Cu13 cluster, the average dissociation energy barrier on the defective graphene-supported Cu13 cluster is substantially reduced by about 76 %. The preferred dissociation mechanisms on the two clusters are H2 located at a top-bridge site with the barrier heights of 0.30 eV on the Cu13 cluster and -0.31 eV on the defective graphene-supported Cu13 cluster. Analysis of the H-Cu bond interactions in the transition states shows that the antibonding-orbital center shifts upward on the defective graphene-supported Cu13 cluster compared with the one on the Cu13 cluster, which explains the reduction of the dissociation energy barrier. The average adsorption energy of dissociated H atoms is also greatly enhanced on the defective graphene-supported Cu13 cluster, about twice that on the Cu13 cluster.
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Affiliation(s)
- Yueru Li
- College of Physics and Electronics, Shandong Normal University, Jinan, 250014, Shandong, China
| | - Dunyou Wang
- College of Physics and Electronics, Shandong Normal University, Jinan, 250014, Shandong, China
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