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Guo D, Liu J, Zhao X, Yang X, Chen X. Comparative computational study of CO2 hydrogenation and dissociation on metal-doped Pd clusters. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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2
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Wang Q, Nassereddine A, Loffreda D, Ricolleau C, Alloyeau D, Louis C, Delannoy L, Nelayah J, Guesmi H. Cu segregation in Au-Cu nanoparticles exposed to hydrogen atmospheric pressure: how is fcc symmetry maintained? Faraday Discuss 2023; 242:375-388. [PMID: 36178299 DOI: 10.1039/d2fd00130f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In a recent work [A. Nassereddine et al., Small 2021, 17, 2104571] we reported the atomic-scale structure and dynamics of sub-4 nm sized Au nanoparticles (NPs) supported on titania in H2 at atmospheric pressure obtained by using aberration-corrected environmental transmission electron microscopy (ETEM), density functional theory (DFT) optimizations and ab initio molecular dynamic (AIMD) simulations. Our results showed unstable Au NPs losing their face-centred cubic (fcc) symmetry (from fcc to non-fcc symmetries) and revealed the drastic effect of hydrogen adsorption. In this work, we use the same approach to study the dynamics of equiatomic Au-Cu NPs in the same range of size and the results show an enhanced structural stability upon alloying by Cu. In spite of the morphology evolution from facetted to rounded shapes, the observed Au-Cu NPs are found to keep their fcc symmetry under atmospheric hydrogen pressure. AIMD simulation evidences a Cu segregation process from the sub-surface toward the upper surface layer, and a reversed segregation of Au atoms from the surface towards the sub-surface sites. The analysis of the chemical ordering in the core shows a tendency to a local chemical ordering where Au-Cu hetero-atomic bindings are favoured. The segregating Cu seems to play a major role in reducing the fluxionality of Au-Cu NPs in H2 and thus, maintaining their fcc symmetry.
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Affiliation(s)
- Q Wang
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | - A Nassereddine
- Université Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, 75013 Paris, France.
| | - D Loffreda
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - C Ricolleau
- Université Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, 75013 Paris, France.
| | - D Alloyeau
- Université Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, 75013 Paris, France.
| | - C Louis
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, Paris, France
| | - L Delannoy
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, Paris, France
| | - J Nelayah
- Université Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, 75013 Paris, France.
| | - H Guesmi
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
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A low crystallinity CuO-SnO2/C catalyst for efficient electrocatalytic reduction of CO2. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2022.117089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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4
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Bimetallic metal–organic framework derived Mn, N co-doped Co-Carbon for electrochemical detection of nitrite. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-022-01735-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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A comprehensive DFT study of CO2 methanation on the Ru-doped Ni(111) surface. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Laser-assisted surface activation for fabrication of flexible non-enzymatic Cu-based sensors. Mikrochim Acta 2022; 189:259. [PMID: 35704127 DOI: 10.1007/s00604-022-05347-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 05/15/2022] [Indexed: 10/18/2022]
Abstract
A rapid and effective technique has been develped for the fabrication of sensor-active copper-based materials on the surface of such flexible polymers as terephthalate, polyethylene naphthalate, and polyimide using the method of laser surface modification. For this purpose, we optimized the polymer surface activation parameters using laser sources with a picosecond pulse duration for subsequent selective metallization within the activated region. Furthermore, the fabricated copper structures were modified with gold nanostructures and by electrochemical passivation to produce copper-gold and oxide-containing copper species, respectively. As a result, in comparison with pure copper electrodes, these composite materials exhibit much better electrocatalytic performance concerning the non-enzymatic identification of biologically important disease markers such as glucose, hydrogen peroxide, and dopamine.
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Fabrication and catalytic properties of “cage like” aryl imine Pd(II)/Cu(II)-bimetallic catalytic monolayer supported on graphene oxide for Suzuki coupling reaction. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Chen Q, Chen X, Ke Q. Mechanism of CO2 hydrogenation to methanol on the W-doped Rh(111) surface unveiled by first-principles calculation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128332] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhang H, Chen F, Xu J, Zhang J, Han Y. Chemical reactions of oily sludge catalyzed by iron oxide under supercritical water gasification condition. Front Chem Sci Eng 2022. [DOI: 10.1007/s11705-021-2125-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cooperative effect between copper species and oxygen vacancy in Ce0.7−xZrxCu0.3O2 catalysts for carbon monoxide oxidation. Front Chem Sci Eng 2021. [DOI: 10.1007/s11705-021-2106-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Detailed kinetic mechanism for the hydrogen production via the oxidative reforming of ethanol. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Dongare S, Singh N, Bhunia H. Nitrogen-doped graphene supported copper nanoparticles for electrochemical reduction of CO2. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2020.101382] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Zhang J, Kong L, Chen Y, Huang H, Zhang H, Yao Y, Xu Y, Xu Y, Wang S, Ma X, Zhao Y. Enhanced synergy between Cu0 and Cu+ on nickel doped copper catalyst for gaseous acetic acid hydrogenation. Front Chem Sci Eng 2020. [DOI: 10.1007/s11705-020-1982-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Han Y, Wang Y, Wang Y, Hu Y, Nian Y, Li W, Zhang J. Pyrrolidone ligand improved Cu‐based catalysts with high performance for acetylene hydrochlorination. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- You Han
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
| | - Yulian Wang
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
| | - Yan Wang
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
| | - Yubing Hu
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
| | - Yao Nian
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
| | - Wei Li
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
| | - Jinli Zhang
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China
- School of Chemistry and Chemical Engineering Shihezi University Shihezi 832003 China
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Abstract
Photocatalysis is an effective technology for preventing the spread of pandemic-scale viruses. This review paper presents an overview of the recent progress in the development of an efficient visible light-sensitive photocatalyst, i.e., a copper oxide nanoclusters grafted titanium dioxide (CuxO/TiO2). The antiviral CuxO/TiO2 photocatalyst is functionalised by a different mechanism in addition to the photocatalytic oxidation process. The CuxO nanocluster consists of the valence states of Cu(I) and Cu(II); herein, the Cu(I) species denaturalizes the protein of the virus, thereby resulting in significant antiviral properties even under dark conditions. Moreover, the Cu(II) species in the CuxO nanocluster serves as an electron acceptor through photo-induced interfacial charge transfer, which leads to the formation of an anti-virus Cu(I) species and holes with strong oxidation power in the valence band of TiO2 under visible-light irradiation. The antiviral function of the CuxO/TiO2 photocatalyst is maintained under indoor conditions, where light illumination is enabled during the day but not during the night; this is because the remaining active Cu(I) species works under dark conditions. The CuxO/TiO2 photocatalyst can thus be used to reduce the risk of virus infection by acting as an antiviral coating material.
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