Metal Doping to Enhance the Photoelectrochemical Behavior of LaFeO3 Photocathodes

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dc.contributorGrupo de Fotoquímica y Electroquímica de Semiconductores (GFES)es_ES
dc.contributor.authorDíez García, María Isabel-
dc.contributor.authorGómez, Roberto-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Físicaes_ES
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Electroquímicaes_ES
dc.identifier.citationChemSusChem. 2017, 10(11): 2457-2463. doi:10.1002/cssc.201700166es_ES
dc.identifier.issn1864-5631 (Print)-
dc.identifier.issn1864-564X (Online)-
dc.description.abstractThe development of tandem devices for water photosplitting requires the preparation of photocathodic materials based on earth-abundant elements that show long-term stability in aqueous electrolytes. Ternary metal oxides seem to be a viable option, among which perovskites stand out. In this context, transparent and compact LaFeO3 thin-film electrodes have been prepared by a sol–gel process, both undoped and doped with metals (M) such as Mg or Zn. Pristine electrodes support the development of cathodic photocurrents in 0.1 m NaOH aqueous solutions, particularly in the presence of oxygen, with an onset potential as high as 1.4 V versus the reversible hydrogen electrode. Doping with Mg or Zn leads to an important enhancement of the photocurrent, which peaks for a stoichiometry of LaFe0.95M0.05O3 with a sixfold enhancement with respect to the pristine material. Such an improvement is attributed to an increase in both the density and mobility of the majority carriers, although a contribution of surface passivation cannot be excluded.es_ES
dc.description.sponsorshipFinancial support from the Spanish Ministry of Economy and Competitiveness through project MAT2015-71727-R (FONDOS FEDER) is gratefully acknowledged.es_ES
dc.publisherWiley-VCH Verlag GmbH & Co. KGaAes_ES
dc.rights© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheimes_ES
dc.subjectPerovskite phaseses_ES
dc.subjectWater splittinges_ES
dc.subject.otherQuímica Físicaes_ES
dc.titleMetal Doping to Enhance the Photoelectrochemical Behavior of LaFeO3 Photocathodeses_ES
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