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Managutti PB, Yu H, Hernandez O, Prestipino C, Dorcet V, Wang H, Hansen TC, Bahout M. Exsolution of Co-Fe Alloy Nanoparticles on the PrBaFeCoO 5+δ Layered Perovskite Monitored by Neutron Powder Diffraction and Catalytic Effect on Dry Reforming of Methane. ACS Appl Mater Interfaces 2023; 15:23040-23050. [PMID: 37040557 DOI: 10.1021/acsami.2c22239] [Citation(s) in RCA: 1] [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: 05/19/2023]
Abstract
Reversible exsolution and dissolution of metal nanoparticles (NPs) in complex oxides have been investigated as an efficient strategy to improve the performance and durability of the catalysts for thermal and electrochemical energy conversion. Here, in situ exsolution of Co-Fe alloy NPs from the layered perovskite PrBaFeCoO5+δ (PBFC) and their dissolution back into the oxide host have been monitored for the first time by in situ neutron powder diffraction and confirmed by X-ray diffraction and electron microscopy. Catalytic tests for dry reforming of methane showed stable operation over ∼100 h at 800 °C with negligible carbon deposition (<0.3 mg/gcat h). The CO2 and CH4 conversions are among the highest achieved by layered double perovskites. The cyclability of the PBFC catalyst and the potential to improve the catalytic activity by adjusting the composition, size, and the NP distribution would pave the way for highly efficient energy conversion applications.
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Affiliation(s)
- Praveen B Managutti
- University of Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, F-35000 Rennes, France
- Chemical Crystallography Laboratory, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, United Arab Emirates
| | - Haoran Yu
- Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 230026 Hefei, Anhui, People's Republic of China
| | - Olivier Hernandez
- University of Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, F-35000 Rennes, France
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
| | - Carmelo Prestipino
- University of Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, F-35000 Rennes, France
| | - Vincent Dorcet
- University of Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, F-35000 Rennes, France
- Univ Rennes, CNRS, ScanMAT─UAR 2025, F-35000 Rennes, France
| | - Haiqian Wang
- Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 230026 Hefei, Anhui, People's Republic of China
| | - Thomas C Hansen
- Laue-Langevin Institute, 71 Avenue des Martyrs CS 20156, 38042 Grenoble, Cedex 9, France
| | - Mona Bahout
- University of Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, F-35000 Rennes, France
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Abstract
Supported bimetallic nanoparticles used for various chemical transformations appear to be more appealing than their monometallic counterparts, because of their unique properties mainly originating from the synergistic effects between the two different metals. Exsolution, a relatively new preparation method for supported nanoparticles, has earned increasing attention for bimetallic systems in the past decade, not only due to the high stability of the resulting nanoparticles but also for the potential to control key particle properties (size, composition, structure, morphology, etc.). In this review, we summarize the trends and advances on exsolution of bimetallic systems and provide prospects for future studies in this field.
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Affiliation(s)
- Chenyang Tang
- School of Engineering.Newcastle UniversityNewcastle upon TyneNE1 7RUUK
| | - Kalliopi Kousi
- School of Engineering.Newcastle UniversityNewcastle upon TyneNE1 7RUUK
| | - Dragos Neagu
- Department of Process and Chemical EngineeringUniversity of StrathclydeGlasgowG1 1XLUK
| | - Ian S. Metcalfe
- School of Engineering.Newcastle UniversityNewcastle upon TyneNE1 7RUUK
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