Photoanodic Hybrid Semiconductor–Molecular Heterojunction for Solar Water Oxidation

Handle URI:
http://hdl.handle.net/10754/595128
Title:
Photoanodic Hybrid Semiconductor–Molecular Heterojunction for Solar Water Oxidation
Authors:
Joya, Khurram Saleem; Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
Abstract:
Inorganic photo-responsive semiconducting materials have been employed in photoelectrochemical(PEC) water oxidation devicesin pursuit of solar to fuel conversion.[1]The reaction kinetics in semiconductors is limited by poor contact at the interfaces, and charge transfer is impeded by surface defects and the grain boundaries.[2]It has shown that successful surface functionalization of the photo-responsive semiconducting materials with co-catalysts can maximize the charge separation, hole delivery and its effective consumption, and enhances the efficiency and performane of the PEC based water oxidation assembly.[3]We present here unique modification of photoanodic hematite (α-Fe2O3) and bismuth vanadate (BiVO4) with molecular co-catalysts for enhanced photoelectrochemical water oxidation (Figure 1). These hybrid inorganic–organometallic heterojunctions manifest impressive cathodic shifts in the onset potentials, and the photocurrent densities have been enhanced by > 90% at all potentials relative to uncatalyzed α-Fe2O3 or BiVO4, and other catalyst-semiconductor based heterojunctions.This is a novel development in the solar to fuel conversion field, and is crucially important for designing a tandem device where light interfere very little with the catalyst layer on top of semiconducting light absorber.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Conference/Event name:
International Conference on Advances in Functional Materials (AFM 2015)
Issue Date:
29-Jun-2015
Type:
Presentation
Additional Links:
http://afm2015.functionalmaterials.org//wp-content/uploads/2015/07/S4-Abs.pdf
Appears in Collections:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); Presentations

Full metadata record

DC FieldValue Language
dc.contributor.authorJoya, Khurram Saleemen
dc.contributor.authorTakanabe, Kazuhiroen
dc.date.accessioned2016-01-28T07:14:06Zen
dc.date.available2016-01-28T07:14:06Zen
dc.date.issued2015-06-29en
dc.identifier.urihttp://hdl.handle.net/10754/595128en
dc.description.abstractInorganic photo-responsive semiconducting materials have been employed in photoelectrochemical(PEC) water oxidation devicesin pursuit of solar to fuel conversion.[1]The reaction kinetics in semiconductors is limited by poor contact at the interfaces, and charge transfer is impeded by surface defects and the grain boundaries.[2]It has shown that successful surface functionalization of the photo-responsive semiconducting materials with co-catalysts can maximize the charge separation, hole delivery and its effective consumption, and enhances the efficiency and performane of the PEC based water oxidation assembly.[3]We present here unique modification of photoanodic hematite (α-Fe2O3) and bismuth vanadate (BiVO4) with molecular co-catalysts for enhanced photoelectrochemical water oxidation (Figure 1). These hybrid inorganic–organometallic heterojunctions manifest impressive cathodic shifts in the onset potentials, and the photocurrent densities have been enhanced by > 90% at all potentials relative to uncatalyzed α-Fe2O3 or BiVO4, and other catalyst-semiconductor based heterojunctions.This is a novel development in the solar to fuel conversion field, and is crucially important for designing a tandem device where light interfere very little with the catalyst layer on top of semiconducting light absorber.en
dc.relation.urlhttp://afm2015.functionalmaterials.org//wp-content/uploads/2015/07/S4-Abs.pdfen
dc.subjectWater oxidationen
dc.subjectphotoelectrochemicalen
dc.subjectsemiconductingmaterialsen
dc.subjectheterojunctionen
dc.subjectsolar fuelen
dc.titlePhotoanodic Hybrid Semiconductor–Molecular Heterojunction for Solar Water Oxidationen
dc.typePresentationen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.conference.date29 June – 3 July 2015en
dc.conference.nameInternational Conference on Advances in Functional Materials (AFM 2015)en
dc.conference.locationStony Brook University, NY State, USAen
dc.contributor.institutionLeiden Institute of Chemistry, Leiden University, Einsteinweg 55, P.O. Box 9502, 2300 RA, Leiden, The Netherlandsen
kaust.authorJoya, Khurram Saleemen
kaust.authorTakanabe, Kazuhiroen
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