Ni stabilised on inorganic complex structures: superior catalysts for chemical CO2 recycling via dry reforming of methane

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dc.contributorMateriales Avanzadoses_ES
dc.contributor.authorLe Saché, Estelle-
dc.contributor.authorPastor Pérez, Laura-
dc.contributor.authorWatson, David-
dc.contributor.authorSepúlveda-Escribano, Antonio-
dc.contributor.authorRamírez Reina, Tomás-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Inorgánicaes_ES
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Materialeses_ES
dc.identifier.citationApplied Catalysis B: Environmental. 2018, 236: 458-465. doi:10.1016/j.apcatb.2018.05.051es_ES
dc.identifier.issn0926-3373 (Print)-
dc.identifier.issn1873-3883 (Online)-
dc.description.abstractCO2 utilisation is becoming an appealing topic in catalysis science due to the urgent need to deal with greenhouse gases (GHG) emissions. Herein, the dry reforming of methane (DRM) represents a viable route to convert CO2 and CH4 (two of the major GHG) into syngas, a highly valuable intermediate in chemical synthesis. Nickel-based catalysts are economically viable materials for this reaction, however they show inevitable signs of deactivation. In this work stabilisation of Ni in a pyrochlore-perovskite structure is reported as a viable method to prevent fast deactivation. Substitution of Zirconium by Ni at various loadings in the lanthanum zirconate pyrochlore La2Zr2O7 is investigated in terms of reactant conversions under various reaction conditions (temperature and space velocity). XRD analysis of the calcined and reduced catalysts showed the formation of crystalline phases corresponding to the pyrochlore structure La2Zr2-xNixO7-δ and an additional La2NiZrO6 perovskite phase at high Ni loadings. Carbon formation is limited using this formulation strategy and, as a consequence, our best catalyst shows excellent activity for DRM at temperatures as low as 600 °C and displays great stability over 350 h of continuous operation. Exsolution of Ni from the oxide structure, leading to small and well dispersed Ni clusters, could explain the enhanced performance.es_ES
dc.description.sponsorshipFinancial support for this work was provided by the Department of Chemical and Process Engineering of the University of Surrey and the EPSRC grants EP/J020184/2 and EP/R512904/1 as well as the Royal Society Research Grant RSGR1180353. Authors would also like to acknowledge the Ministerio de Economía, Industria y Competitividad of Spain (Project MAT2013-45008-P).es_ES
dc.rights© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (
dc.subjectCO2 conversiones_ES
dc.subjectDry reforming of methanees_ES
dc.subjectNickel catalystses_ES
dc.subject.otherQuímica Inorgánicaes_ES
dc.titleNi stabilised on inorganic complex structures: superior catalysts for chemical CO2 recycling via dry reforming of methanees_ES
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