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dc.contributor.authorKlahr, Benjamin
dc.contributor.authorGimenez, Sixto
dc.contributor.authorFabregat-Santiago, Francisco
dc.contributor.authorBisquert, Juan
dc.contributor.authorHamann, Thomas
dc.date.accessioned2013-06-07T10:00:45Z
dc.date.available2013-06-07T10:00:45Z
dc.date.issued2012
dc.identifier.issn0002-7863
dc.identifier.urihttp://hdl.handle.net/10234/66375
dc.description.abstractUniform thin films of hematite (α-Fe2O3) deposited by atomic layer deposition (ALD) coated with varying amounts of the cobalt phosphate catalyst, “Co–Pi,” were investigated with steady-state and transient photoelectrochemical measurements and impedance spectroscopy. Systematic studies as a function of Co–Pi thickness were performed in order to clarify the mechanism by which Co–Pi enhances the water-splitting performance of hematite electrodes. It was found that under illumination, the Co–Pi catalyst can efficiently collect and store photogenerated holes from the hematite electrode. This charge separation reduces surface state recombination which results in increased water oxidation efficiency. It was also found that thicker Co–Pi films produced increased water oxidation efficiencies which is attributed to a combination of superior charge separation and increased surface area of the porous catalytic film. These combined results provide important new understanding of the enhancement and limitations of the Co–Pi catalyst coupled with semiconductor electrodes for water-splitting applications.ca_CA
dc.language.isoengca_CA
dc.publisherAmerican Chemical Societyca_CA
dc.relation.isPartOfJournal of the American Chemical Society, 134, 40ca_CA
dc.rightsThis document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Journal of The American Chemical Society, copyright © American Chemical Society after peer review.ca_CA
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/*
dc.subjectAtomic layer depositionca_CA
dc.subjectCatalystsca_CA
dc.subjectCatalytic oxidationca_CA
dc.subjectElectrochemistryca_CA
dc.subjectElectrodesca_CA
dc.subjectHematiteca_CA
dc.subjectOxidationca_CA
dc.subjectSeparationca_CA
dc.titlePhotoelectrochemical and Impedance Spectroscopic Investigation of Water Oxidation with “Co–Pi”-Coated Hematite Electrodesca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1021/ja306427f
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://pubs.acs.org/doi/abs/10.1021/ja306427fca_CA
dc.type.versioninfo:eu-repo/semantics/submittedVersion


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