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dc.contributor.authorVílchez-Cózar, Álvaro
dc.contributor.authorPérez-Colodrero, Rosario Mercedes 
dc.contributor.authorBazaga-García, Montse
dc.contributor.authorMarrero-López, David 
dc.contributor.authorEl-Refaei, S.M.
dc.contributor.authorRusso, Patricia A.
dc.contributor.authorPinna, Nicola
dc.contributor.authorOlivera-Pastor, Pascual 
dc.date.accessioned2023-06-13T08:37:50Z
dc.date.available2023-06-13T08:37:50Z
dc.date.issued2023
dc.identifier.citationÁlvaro Vílchez-Cózar, Rosario M.P. Colodrero, Montse Bazaga-García, David Marrero-López, Sayed M. El-refaei, Patrícia A. Russo, Nicola Pinna, Pascual Olivera-Pastor, Aurelio Cabeza, Tuning the activity of cobalt 2-hydroxyphosphonoacetates-derived electrocatalysts for water splitting and oxygen reduction: Insights into the local order by pair distribution function analysis, Applied Catalysis B: Environmental, Volume 337, 2023, 122963, ISSN 0926-3373, https://doi.org/10.1016/j.apcatb.2023.122963.es_ES
dc.identifier.urihttps://hdl.handle.net/10630/26949
dc.description.abstractPyrophosphate- or phosphide-based iron/cobalt electrocatalysts were prepared from the metal (R,S)−2-hydroxyphosphonoacetates to evaluate the effects of metal composition, N-doping and P-enrichment on the electrocatalytic activity. Rietveld and Pair Distribution Function analysis were used to determine phase composition. Irrespectively of the amorphous or crystalline nature, all pyrolyzed solids transformed under OER operation into biphasic Fe/CoO(OH), composed of discrete clusters (size ≤ 20 Å). Carbon paper-supported Fe0.2Co0.8O(OH) electrocatalysts displayed the best OER performances (overpotentials of 270–279 mV at 10 mA·cm−2), attributable to the formation of highly active bimetallic intermediate species. For HER, increased concentration of o-CoP in phosphide-based electrocatalysts resulted in improved performance, up to an overpotential of 140 mV. Employed as anode in alkaline water splitting, amorphous Fe-doped cobalt pyrophosphate and phosphide-derived electrocatalysts showed a cell voltage of 1.58 V at 10 mA·cm−2, with comparable stability to that of RuO2 and requiring lower voltage demand at high current densities.es_ES
dc.description.sponsorshipThis work was funded by the PID2019-110249RB-I00/AEI/10.13039/501100011033; TED2021–129836B-I00/AEI/10.13039/501100011033/Unión Europea NextGenerationEU/PRTR (MICIU, Spain) and P20-00416 (Junta de Andalucia, Spain/FEDER) research projects. Synchrotron X-ray powder diffraction studies were performed at MSPD04 beamline at ALBA Synchrotron Light with the collaboration of ALBA staff. A.V.C. thanks MICIU for PRE2020-094459 student grant. R.M.P.C. acknowledges funding by project acknowledges B1_2022-23 (Plan Propio UMA). M.B.G. thanks PAIDI2020-DOC_00272 research grant (Junta de Andalucia, Spain). Funding for open access charge: Universidad de Málaga / CBUA.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectCatalizadoreses_ES
dc.subjectCatálisises_ES
dc.subjectElectroquímicaes_ES
dc.subject.otherCobalt phosphonates/pyrophosphates/phosphideses_ES
dc.subject.otherElectrocatalystses_ES
dc.subject.otherPDF analysises_ES
dc.subject.otherOER/HER/ORRes_ES
dc.subject.otherWater splittinges_ES
dc.titleTuning the activity of cobalt 2-hydroxyphosphonoacetates-derived electrocatalysts for water splitting and oxygen reduction: insights into the local order by pair distribution function analysises_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.centroFacultad de Cienciases_ES
dc.identifier.doihttps://doi.org/10.1016/j.apcatb.2023.122963
dc.rights.ccAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones_ES


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