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  Inducing synergy in bimetallic RhNi catalysts for CO2 methanation by galvanic replacement

Wang, Y., Arandiyan, H., Bartlett, S. A., Trunschke, A., Sun, H., Scott, J., et al. (2020). Inducing synergy in bimetallic RhNi catalysts for CO2 methanation by galvanic replacement. Applied Catalysis B, 277: 119029. doi:10.1016/j.apcatb.2020.119029.

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Appl Catal B RhNi CO2 methanation - Manuscript.pdf (Any fulltext), 3MB
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 Creators:
Wang, Yuanqing1, 2, 3, Author           
Arandiyan, Hamidreza4, Author
Bartlett, Stuart A.4, Author
Trunschke, Annette1, Author           
Sun, Hongyu5, Author
Scott, Jason2, Author
Lee, Adam F.6, Author
Wilson, Karen6, Author
Maschmeyer, Thomas4, Author
Schlögl, Robert1, Author           
Amal, Rosa2, Author
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney 2052, Australia, ou_persistent22              
3School of Chemistry, Faculty of Science, The University of New South Wales, Sydney, New South Wales, Australia, ou_persistent22              
4Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Sydney 2006, Australia, ou_persistent22              
5Department of Micro- and Nanotechnology, Technical University of Denmark, Kongens Lyngby 2800, Denmark, ou_persistent22              
6School of Science, Royal Melbourne Institute of Technology University, Melbourne, VIC 3000, Australia, ou_persistent22              

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Free keywords: Bimetallic nanoparticle galvanic replacement CO2 methane
 Abstract: CO2 utilisation as a chemical feedstock could transform fuels production and help mitigate climate change. Direct CO2 reduction for energy production requires the development of active, stable, and low-cost catalysts selective for methane. A bimetallic Ni@Rh core-shell catalyst prepared by galvanic replacement (GR) exhibits a 3.5-fold rate enhancement for CO2 methanation relative to an analogue prepared by chemical reduction (CR) and is twice as active as monometallic Rh/Al2O3. Superior performance of RhNi/Al2O3 (GR) is attributed to Rh dispersion as an atomically thin RhOx shell encapsulating Ni nanoparticles, stabilised by a strong Rh-Ni interaction. Operando IR spectroscopy identifies reactively-formed CO from the dissociative chemisorption of CO2 over Rh as the key intermediate for methane production. Surface formate from the dissociative chemisorption of CO2 and subsequent hydrogenation (via spillover from Rh sites) over alumina is a catalytic spectator. This mechanistic insight paves the way to high activity nanostructured catalysts for CO2 methanation.

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Language(s): eng - English
 Dates: 2020-04-152019-10-162020-04-182020-04-292020-11-15
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.apcatb.2020.119029
 Degree: -

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Title: Applied Catalysis B
  Other : Appl. Catal. B
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 11 Volume / Issue: 277 Sequence Number: 119029 Start / End Page: - Identifier: ISSN: 0926-3373
CoNE: https://pure.mpg.de/cone/journals/resource/954928540173_1