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Analysis of nitrogen fixation by a catalyst capable of transforming N2, CO2 and CH4 into amino acids under mild reactions conditions Revilla López, Guillermo Sans Milà, Jordi Casanovas Salas, Jordi Bertran Cànovas, Òscar Puiggalí Bellalta, Jordi Turon, Pau Alemán Llansó, Carlos Universitat Politècnica de Catalunya. Departament d'Enginyeria Química Universitat Politècnica de Catalunya. Doctorat en Polímers i Biopolímers Universitat Politècnica de Catalunya. Departament de Física Universitat Politècnica de Catalunya. IMEM-BRT- Innovation in Materials and Molecular Engineering - Biomaterials for Regenerative Therapies Universitat Politècnica de Catalunya. PSEP - Polimers Sintètics: Estructura i Propietats. Polimers Biodegradables Àrees temàtiques de la UPC::Enginyeria química Photosynthesis Artificial photosynthesis carbon fixation hydroxyapatite N–N bond cleavage Fotosíntesi Nitrogen -- Fixació The processes related to the fixation of nitrogen ina catalyst able to produce glycine and alanine from a N2, CO2and CH4gas mixture at mild reaction conditions have been studied by combining experimental and theoretical investigations.Results have allowed to understand the role of different elements of the catalyst, which is constituted by permanently polarized hydroxyapatite (p-HAp), zirconia, and aminotris(methylenephosphonic acid)(ATMP). ATMP attractsN2moleculestowards the surface,maintainingthem close to the zirconiaand p-HAp componentsthatare the most active from a catalytic point of view. On the other hand, the associative mechanismisthermodynamicallyfavouredunder mild reaction conditionswith respect to the dissociative one,whichis limited by the barrier associated to the N–Nbondcleavage. Because this reaction mechanism is similar to that employed in the nitrogen fixation bynitrogenase enzymes, thesefindingsprovide an opportunity to designnew bioinspired catalysts Postprint (author's final draft) 2020-04-25 Article Revilla-López, G. [et al.]. Analysis of nitrogen fixation by a catalyst capable of transforming N2, CO2 and CH4 into amino acids under mild reactions conditions. "Applied catalysis A. General", 25 Abril 2020, vol. 596, p. 1-9. 0926-860X https://hdl.handle.net/2117/342071 10.1016/j.apcata.2020.117526 eng https://www.sciencedirect.com/science/article/abs/pii/S0926860X20301198 Open Access 9 p. application/pdf