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Tested as catalysts for the methanation of CO<jats:sub>2<\/jats:sub> and regardless of the actinide element, the yield and selectivity towards CH<jats:sub>4<\/jats:sub> are high (&gt;40 and 95\u2009%, respectively), which was explained by their physicochemical properties such as reducibility and basicity and the existence of a synergic effect between cobalt and actinide species. The aerogels present the best catalytic behavior, namely those with thorium and the catalytic activity increases with the Co\/An molar ratio. Both aerogels and nanofibers also present a high resistance to deactivation for at least 75\u2005h in the gaseous stream, which is an advantage for any catalytic application. Moreover, at 300\u2009\u00b0C they are 2 to 4\u2005times more active than two reference catalysts (5<jats:sub>wt\u2009%<\/jats:sub> Rh\/Al<jats:sub>2<\/jats:sub>O<jats:sub>3<\/jats:sub> and NiO\/Al<jats:sub>2<\/jats:sub>O<jats:sub>3<\/jats:sub>) tested in the same conditions, which to our best knowledge is a significant result.<\/jats:p>","DOI":"10.1002\/cctc.202201303","type":"journal-article","created":{"date-parts":[[2023,1,26]],"date-time":"2023-01-26T08:09:55Z","timestamp":1674720595000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Methanation of CO<sub>2<\/sub> Over Nanostructured Cobalt\u2010Actinide Bimetallic Oxides"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0921-1018","authenticated-orcid":false,"given":"Ana C.","family":"Ferreira","sequence":"first","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural Institute of Molecular Sciences Instituto Superior T\u00e9cnico Universidade de Lisboa  Campus Tecnol\u00f3gico e Nuclear 2695-066 Bobadela Portugal"}]},{"given":"Joaquim B.","family":"Branco","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural Institute of Molecular Sciences Instituto Superior T\u00e9cnico Universidade de Lisboa  Campus Tecnol\u00f3gico e Nuclear 2695-066 Bobadela Portugal"},{"name":"Departamento de Engenharia e Ci\u00eancias Nucleares Instituto Superior T\u00e9cnico Universidade de Lisboa  Campus Tecnol\u00f3gico e Nuclear 2695-066 Bobadela Portugal"}]},{"given":"Joana F.","family":"Martinho","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural Institute of Molecular Sciences Instituto Superior T\u00e9cnico Universidade de Lisboa  Campus Tecnol\u00f3gico e Nuclear 2695-066 Bobadela Portugal"}]},{"given":"Ana M.","family":"Ferraria","sequence":"additional","affiliation":[{"name":"BSIRG-iBB-Institute for Bioengineering and Biosciences Universidade de Lisboa  Lisboa 1049-001 Lisbon Portugal"},{"name":"Associate Laboratory i4HB Institute for Health and Bioeconomy at Instituto Superior T\u00e9cnico Universidade de Lisboa  1049-001 Lisboa Portugal"}]},{"given":"Ana M.","family":"Botelho de Rego","sequence":"additional","affiliation":[{"name":"BSIRG-iBB-Institute for Bioengineering and Biosciences Universidade de Lisboa  Lisboa 1049-001 Lisbon Portugal"},{"name":"Associate Laboratory i4HB Institute for Health and Bioeconomy at Instituto Superior T\u00e9cnico Universidade de Lisboa  1049-001 Lisboa Portugal"}]},{"given":"I.","family":"Ferreira Machado","sequence":"additional","affiliation":[{"name":"BSIRG-iBB-Institute for Bioengineering and Biosciences Universidade de Lisboa  Lisboa 1049-001 Lisbon Portugal"},{"name":"Associate Laboratory i4HB Institute for Health and Bioeconomy at Instituto Superior T\u00e9cnico Universidade de Lisboa  1049-001 Lisboa Portugal"},{"name":"Polytechnic Institute of Portalegre  P-7300-110 Portalegre Portugal"}]},{"given":"L. 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