Carbon-supported Ni nanoparticles in CO2 methanation:role of a superficial NiO shell observed by in situ TEMOA
Carbon-supported Ni nanoparticles in CO2 methanation:role of a superficial NiO shell observed by in situ TEM†
CO2 methanation offers a pathway to produce a carbon-neutral methane fuel.Although a number of research efforts have been conducted on this topic,a greater understanding of the mechanism of the reaction,which is still under debate,is needed.Here,using in situ transmission electron microscopy,we provide direct insights into the dynamics of a metallic nickel catalyst supported on activated carbon during CO2 methanation.The keys to the high performance of the catalyst are the in situ formation and dynamic behavior of a Ni@NiO core@shell nanostructure.Based on the detailed electron microscopy investigation,the mechanism of such nanostructure formation during methanation is proposed.Our studies revealed that the deactivation of the catalyst is not due to the accumulation of carbon coke over nickel nanoparticles,but an increase in the size of the nickel nanoparticles that is responsible for the deactivation of the catalyst over time.
Katherine E.MacArthur;Shibabrata Basak;Rüdiger-A.Eichel;Yury V.Kolen'ko;M.Fernando R.Pereira;Liliana P.L.Gonçalves;Juliana P.S.Sousa;O.Salomé G.P.Soares;Hans Kungl;Eva Jodat;André Karl;Marc Heggen;Rafal E.Dunin-Borkowski
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons,Forschungszentrum Jülich,52425 Jülich,GermanyInstitute of Energy Technologies-Fundamental Electrochemistry(IET-1),Forschungszentrum Jülich GmbH,Jülich,GermanyInstitute of Energy Technologies-Fundamental Electrochemistry(IET-1),Forschungszentrum Jülich GmbH,Jülich,Germany||Institute of Physical Chemistry,RWTH Aachen University,Aachen,Germany||Faculty of Mechanical Engineering,RWTH Aachen University,Aachen,GermanyInternational Iberian Nanotechnology Laboratory(INL),Braga 4715-330,PortugalLSRE-LCM-Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,Portugal||ALiCE-Associate Laboratory in Chemical Engineering,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,PortugalInternational Iberian Nanotechnology Laboratory(INL),Braga 4715-330,Portugal||LSRE-LCM-Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,Portugal||ALiCE-Associate Laboratory in Chemical Engineering,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,PortugalInternational Iberian Nanotechnology Laboratory(INL),Braga 4715-330,PortugalLSRE-LCM-Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,Portugal||ALiCE-Associate Laboratory in Chemical Engineering,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,PortugalInstitute of Energy Technologies-Fundamental Electrochemistry(IET-1),Forschungszentrum Jülich GmbH,Jülich,GermanyInstitute of Energy Technologies-Fundamental Electrochemistry(IET-1),Forschungszentrum Jülich GmbH,Jülich,GermanyInstitute of Energy Technologies-Fundamental Electrochemistry(IET-1),Forschungszentrum Jülich GmbH,Jülich,GermanyErnst Ruska-Centre for Microscopy and Spectroscopy with Electrons,Forschungszentrum Jülich,52425 Jülich,GermanyErnst Ruska-Centre for Microscopy and Spectroscopy with Electrons,Forschungszentrum Jülich,52425 Jülich,Germany
CO2 valorizationHydrogenationin situ TEMCarbon catalystsCore-shell nanoparticlesMicrostructure
CO2 valorizationHydrogenationin situ TEMCarbon catalystsCore-shell nanoparticlesMicrostructure
《工业化学与材料（英文）》 2026 (2)
237-243,7
The authors gratefully acknowledge the support of the German Research Foundation(DFG)for supporting this work under grant number HE 7192/1-2.S.B.acknowledges support for the project'Electroscopy'(Grant No.892916)from the Marie Skłodowska-Curie action.L.P.L.G.thanks the Portuguese Foundation for Science and Technology(FCT)for the PhD grant(SFRH/BD/128986/2017).This work was partially supported by national funds through Fundação para a Ciência e a Tecnologia,I.P./MCTES:LSRE-LCM,UID/50020ALiCE,LA/P/0045/2020(DOI:https://doi.org/10.54499/LA/P/0045/2020).O.S.G.P.S.acknowledges FCT funding under the Scientific Employment Stimulus-Institutional Call(CEECINST/00049/2018).
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