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Gholinejad M, Bashirimousavi S, Sansano JM. Novel magnetic bimetallic AuCu catalyst for reduction of nitroarenes and degradation of organic dyes. Sci Rep 2024; 14:5852. [PMID: 38462664 PMCID: PMC10925594 DOI: 10.1038/s41598-024-56559-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 03/07/2024] [Indexed: 03/12/2024] Open
Abstract
Herein, core-shell magnetic nanoparticles are modified with imidazolium-tagged phosphine and propylene glycol moieties and used for the stabilization of bimetallic AuCu nanoparticles. The structure and morphology of the prepared material are identified with SEM, TEM, XRD, XPS, atomic absorption spectroscopy, Fourier translation infrared spectroscopy, and a vibrating sample magnetometer. This hydrophilic magnetic bimetallic catalyst is applied in the reduction of toxic nitroarenes and reductive degradation of hazardous organic dyes such as methyl orange (MO), methyl red (MR), and rhodamine B (RhB), as well as in the degradation of tetracycline (TC). This magnetic AuCu catalyst indicated superior activity in all three mentioned reactions in comparison with its single metal Au and Cu analogs. This catalyst is recycled for 17 consecutive runs in the reduction of 4-nitrophenol to 4-aminophenol without a significant decrease in catalytic activity and recycled catalyst is characterized.
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Affiliation(s)
- Mohammad Gholinejad
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gavazang, P. O. Box 45195-1159, Zanjan, 45137-66731, Iran.
- Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran.
| | - Saba Bashirimousavi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gavazang, P. O. Box 45195-1159, Zanjan, 45137-66731, Iran
| | - José M Sansano
- Departamento de Química Orgánica, Instituto de Síntesis Orgánica, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, 03690, Alicante, Spain
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Ma X, Shen Y, Yao S, Shu M, Si R, An C. Self-Supported Nanoporous Au 3 Cu Electrode with Enriched Gold on Surface for Efficient Electrochemical Reduction of CO 2. Chemistry 2019; 26:4143-4149. [PMID: 31800117 DOI: 10.1002/chem.201904619] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Indexed: 11/11/2022]
Abstract
The key to the electrochemical conversion of CO2 lies in the development of efficient electrocatalysts with ease of operation, good conductivity, and rich active sites that fulfil the desired reaction direction and selectivity. Herein, an oxidative etching of Au20 Cu80 alloy is used for the synthesis of a nanoporous Au3 Cu alloy, representing a facile strategy for tuning the surface electronic properties and altering the adsorption behavior of the intermediates. HRTEM, XPS, and EXAFS results reveal that the curved surface of the synthesized nanoporous Au3 Cu is rich in gold with unsaturated coordination conditions. It can be used directly as a self-supported electrode for CO2 reduction, and exhibits high Faradaic efficiency (FE) of 98.12 % toward CO at a potential of -0.7 V versus the reversible hydrogen electrode (RHE). The FE is 1.47 times that over the as-made single nanoporous Au. Density functional theory reveals that *CO has a relatively long distance on the surface of nanoporous Au3 Cu, making desorption of CO easier and avoiding CO poisoning. The Hirshfeld charge distribution shows that the Au atoms have a negative charge and the Cu atoms exhibit a positive charge, which separately bond to the C atom and O atom in the *COOH intermediate through a bidentate mode. This affords the lowest *COOH adsorption free energy and low desorption energy for CO molecules.
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Affiliation(s)
- Xiaoming Ma
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of, Advanced Functional Porous Materials, Institute for, New Energy Materials & Low-Carbon Technologies, Tianjin University of Technology, Tianjin, 300384, China
| | - Yongli Shen
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of, Advanced Functional Porous Materials, Institute for, New Energy Materials & Low-Carbon Technologies, Tianjin University of Technology, Tianjin, 300384, China
| | - Shuang Yao
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of, Advanced Functional Porous Materials, Institute for, New Energy Materials & Low-Carbon Technologies, Tianjin University of Technology, Tianjin, 300384, China
| | - Miao Shu
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Rui Si
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Changhua An
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of, Advanced Functional Porous Materials, Institute for, New Energy Materials & Low-Carbon Technologies, Tianjin University of Technology, Tianjin, 300384, China
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Najafishirtari S, Kokumai TM, Marras S, Destro P, Prato M, Scarpellini A, Brescia R, Lak A, Pellegrino T, Zanchet D, Manna L, Colombo M. Dumbbell-like Au 0.5Cu 0.5@Fe 3O 4 Nanocrystals: Synthesis, Characterization, and Catalytic Activity in CO Oxidation. ACS Appl Mater Interfaces 2016; 8:28624-28632. [PMID: 27723286 DOI: 10.1021/acsami.6b09813] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report the colloidal synthesis of dumbbell-like Au0.5Cu0.5@Fe3O4 nanocrystals (AuCu@FeOx NCs) and the study of their properties in the CO oxidation reaction. To this aim, the as-prepared NCs were deposited on γ-alumina and pretreated in an oxidizing environment to remove the organic ligands. A comparison of these NCs with bulk Fe3O4-supported AuCu NCs showed that the nanosized support was far more effective in preventing the sintering of the metal domains, leading thus to a superior catalytic activity. Nanosizing of the support could be thus an effective, general strategy to improve the thermal stability of metallic NCs. On the other hand, the support size did not affect the chemical transformations experienced by the AuCu NCs during the activation step. Independently from the support size, we observed indeed the segregation of Cu from the alloy phase under oxidative conditions as well as the possible incorporation of the Cu atoms in the iron oxide domain.
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Affiliation(s)
- Sharif Najafishirtari
- Dipartimento di Chimica e Chimica Industriale, Università di Genova , via Dodecaneso 31-I, 16146 Genova, Italy
| | - Tathiana Midori Kokumai
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, São Paulo, Brazil
| | | | - Priscila Destro
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, São Paulo, Brazil
| | | | | | | | | | | | - Daniela Zanchet
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, São Paulo, Brazil
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Gong M, Kirkeminde A, Skomski R, Cui J, Ren S. Template-directed FeCo nanoshells on AuCu. Small 2014; 10:4118-4122. [PMID: 25044862 DOI: 10.1002/smll.201401049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 06/11/2014] [Indexed: 06/03/2023]
Abstract
Schematic AuCu/FeCo core-shell magnetic nanoparticles: FeCo shell is precisely synthesized on non-magnetic AuCu core to form the core/shell nanostructures. Due to the non-magnetic AuCu core, the FeCo shell exhibits a transition from single domain to magnetic vortex state.
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Affiliation(s)
- Maogang Gong
- Department of Chemistry, University of Kansas, Lawrence, KS, 66045, USA
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