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dc.creatorKoverga A.A.
dc.creatorGómez-Marín A.M.
dc.creatorDorkis L.
dc.creatorFlórez E.
dc.creatorTicianelli E.A.
dc.date2020
dc.date.accessioned2021-02-05T14:58:41Z
dc.date.available2021-02-05T14:58:41Z
dc.identifier.issn19448252
dc.identifier.urihttp://hdl.handle.net/11407/6007
dc.descriptionModification of electronic and chemical properties of a material by the introduction of another element into its lattice is one of the most common methods for designing new catalysts for different applications. In this work the effect of modifying molybdenum carbide with transition metals (Fe, Co, Ni, Cu), TM-Mo2C composites, upon the catalytic activity toward hydrogen evolution reaction (HER) in mild acidic and alkaline media has been studied. Catalysts were prepared by carbothermal reduction of molybdenum and TM oxides precursors and were characterized by different physicochemical techniques. Results evidenced a strong pH effect on the catalytic performance of TM-Mo2C, while, at pH = 5, inclusion of TM into the Mo2C lattice has a deleterious effect on the HER activity and, at pH = 9, a promoting effect was observed, highlighting the importance of considering specific operation conditions during the catalyst design process. Analysis of in situ near-edge X-ray adsorption data reveals a decrease on the oxidation state and average bond ionicity of dopant metal upon a pH increase, shedding light of the different effects of TMs on the resulting HER activity in acidic and alkaline media. Finally, stability tests demonstrated no deterioration on catalysts' performance after 8 h of continuous cycling within the HER working range, confirming the suitability of Mo2C materials as promising HER catalysts.
dc.language.isoeng
dc.publisherNLM (Medline)
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85086682999&doi=10.1021%2facsami.0c04806&partnerID=40&md5=fec851a074055a5acca40879173df9b1
dc.sourceACS applied materials & interfaces
dc.subjectcarbidesspa
dc.subjectdopingspa
dc.subjectelectrocatalysisspa
dc.subjectHERspa
dc.subjecttransition metalsspa
dc.titleRole of Transition Metals on TM/Mo2C Composites: Hydrogen Evolution Activity in Mildly Acidic and Alkaline Media
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.identifier.doi10.1021/acsami.0c04806
dc.relation.citationvolume12
dc.relation.citationissue24
dc.relation.citationstartpage27150
dc.relation.citationendpage27165
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.affiliationKoverga, A.A., Facultad de Minas, Departamento de Materiales y Minerales, Grupo de Investigación en Catálisis y Nanomateriales, Universidad Nacional de Colombia sede Medellín, Medellín 050041, Colombia
dc.affiliationGómez-Marín, A.M., Department of Chemistry, Division of Fundamental Sciences (IEFQ), Technological Institute of Aeronautics (ITA), São José dos Campos 12228-900, Brazil, Instituto de Química de São Carlos, Universidade de São Paulo, Fisico Quimica, Caixa Postal 780Av. Trabalhador Sao Carlense, São Carlos 13560-970, Brazil
dc.affiliationDorkis, L., Facultad de Minas, Departamento de Materiales y Minerales, Grupo de Investigación en Catálisis y Nanomateriales, Universidad Nacional de Colombia sede Medellín, Medellín 050041, Colombia
dc.affiliationFlórez, E., Facultad de Ciencias Básicas, Grupo de Investigación MAT&MPAC, Universidad de Medellín, Medellín 050026, Colombia
dc.affiliationTicianelli, E.A., Instituto de Química de São Carlos, Universidade de São Paulo, Fisico Quimica, Caixa Postal 780Av. Trabalhador Sao Carlense, São Carlos 13560-970, Brazil
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.type.driverinfo:eu-repo/semantics/article


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