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Wang D, Jung HD, Liu S, Chen J, Yang H, He Q, Xi S, Back S, Wang L. Revealing the structural evolution of CuAg composites during electrochemical carbon monoxide reduction. Nat Commun 2024; 15:4692. [PMID: 38824127 PMCID: PMC11144262 DOI: 10.1038/s41467-024-49158-4] [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: 03/01/2024] [Accepted: 05/23/2024] [Indexed: 06/03/2024] Open
Abstract
Comprehending the catalyst structural evolution during the electrocatalytic process is crucial for establishing robust structure/performance correlations for future catalysts design. Herein, we interrogate the structural evolution of a promising Cu-Ag oxide catalyst precursor during electrochemical carbon monoxide reduction. By using extensive in situ and ex situ characterization techniques, we reveal that the homogenous oxide precursors undergo a transformation to a bimetallic composite consisting of small Ag nanoparticles enveloped by thin layers of amorphous Cu. We believe that the amorphous Cu layer with undercoordinated nature is responsible for the enhanced catalytic performance of the current catalyst composite. By tuning the Cu/Ag ratio in the oxide precursor, we find that increasing the Ag concentration greatly promotes liquid products formation while suppressing the byproduct hydrogen. CO2/CO co-feeding electrolysis and isotopic labelling experiments suggest that high CO concentrations in the feed favor the formation of multi-carbon products. Overall, we anticipate the insights obtained for Cu-Ag bimetallic systems for CO electroreduction in this study may guide future catalyst design with improved performance.
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Affiliation(s)
- Di Wang
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Hyun Dong Jung
- Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, Republic of Korea
| | - Shikai Liu
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Jiayi Chen
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Haozhou Yang
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Qian He
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore.
| | - Shibo Xi
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.
| | - Seoin Back
- Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, Republic of Korea.
| | - Lei Wang
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore.
- Centre for Hydrogen Innovations, National University of Singapore, Singapore, Singapore.
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Wang L, Jiang N, Xu H, Luo Y, Zhang T. Trace Cu(II)-Mediated Selective Oxidation of Benzothiazole: The Predominance of Sequential Cu(II)-Cu(I)-Cu(III) Valence Transition and Dissolved Oxygen. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12523-12533. [PMID: 37552881 DOI: 10.1021/acs.est.3c04134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Trace Cu(II), which inherently exists in soil and some water/wastewater, can trigger persulfate oxidation of some pollutants, but the oxidation capability and mechanism are not well understood, especially toward refractory pollutants. We report in this research that benzothiazole (BTH), a universal refractory pollutant typically originating from tire leachates and various industrial wastewater, can be facilely and selectively removed by peroxydisulfate (PDS) with an equimolar BTH/PDS stoichiometry in the presence of environmental-relevant contents of Cu(II) (below several micromoles). Comprehensive scavenging tests, electron spin resonance analysis, spectroscopy characterization, and electrochemical analysis, revealed that PDS first reduces the BTH-coordinated Cu(II) to Cu(I) and then oxidizes Cu(I) to high-valent Cu(III), which accounts for the BTH degradation. Moreover, once the reaction is initiated, the superoxide radical is probably produced in the presence of dissolved oxygen, which subsequently dominates the reduction of Cu(II) to Cu(I). This facile oxidation process is also effective in removing a series of BTH derivatives (BTHs) that are of environmental concern, thus can be used for their source control. The results highlight the sequential Cu(II)-Cu(I)-Cu(III) transition during PDS activation and the crucial role of contaminant coordination with Cu(II) in oxidative transformation.
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Affiliation(s)
- Lihong Wang
- Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences, Beijing 100085, China
| | - Ning Jiang
- Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences, Beijing 100085, China
| | - Haodan Xu
- Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences, Beijing 100085, China
| | - Yiwen Luo
- Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences, Beijing 100085, China
| | - Tao Zhang
- Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences, Beijing 100085, China
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Wide-pH-range adaptable ammonia electrosynthesis from nitrate on Cu-Pd interfaces. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1411-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Harroun SG, Zhang Y, Chen TH, Chang HT, Vallée-Bélisle A. Silver oxide model surface improves computational simulation of surface-enhanced Raman spectroscopy on silver nanoparticles. Phys Chem Chem Phys 2021; 23:15480-15484. [PMID: 34263277 DOI: 10.1039/d1cp01498f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surface-enhanced Raman spectroscopy (SERS) coupled with density functional theory (DFT) computations can characterise the adsorption orientation of a molecule on a nanoparticle surface. When using DFT to simulate SERS on a silver surface, one typically employs an atom (Ag), ion (Ag+), or cluster (Agx or Agx+) as the model surface. Here, by examining the nucleobase 2,6-diaminopurine (2,6-DAP) and then generalising our strategy to three other molecules, we show that employing silver oxide (Ag2O) as the model surface can quantitatively improve the accuracy of simulated SERS.
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Affiliation(s)
- Scott G Harroun
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada.
| | - Yaoting Zhang
- Department of Chemistry, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Tzu-Heng Chen
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan. and Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.
| | - Alexis Vallée-Bélisle
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada. and Département de Biochimie et Médicine Moléculaire, Université de Montréal, Montréal, QC, H3C 3J7, Canada
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Gimeno L, Picardi G, Planchat A, Knight DA, Lamy de la Chapelle M, Humbert B, Queffélec C. Improving the rate of the copper-catalyzed Henry reaction by surface plasmon excitation of gold nanoparticles. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01788h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Green plasmon excitation of colloidal Au nanoparticles, onto which a copper(ii) complex was grafted, in the presence of nitrobenzaldehyde and nitromethane in DMF, lead to the formation of the corresponding nitroaldol with high efficiency.
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Affiliation(s)
- Léa Gimeno
- CNRS, CEISAM UMR 6230, Université de Nantes, 2, Rue de la Houssinière, F-44000 Nantes, France
| | - Gennaro Picardi
- CNRS, CEISAM UMR 6230, Université de Nantes, 2, Rue de la Houssinière, F-44000 Nantes, France
| | - Aurélien Planchat
- CNRS, CEISAM UMR 6230, Université de Nantes, 2, Rue de la Houssinière, F-44000 Nantes, France
| | - D. Andrew Knight
- Department of Biomedical & Chemical Engineering & Science, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida, 32901, USA
| | - Marc Lamy de la Chapelle
- CNRS, UMR 6283, Institut des Molécules et Matériaux du Mans (IMMM), Université du Mans, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Bernard Humbert
- CNRS, Institut des Matériaux Jean Rouxel, Université de Nantes, 2, Rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - Clémence Queffélec
- CNRS, CEISAM UMR 6230, Université de Nantes, 2, Rue de la Houssinière, F-44000 Nantes, France
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