Photoelectrochemical and electrocatalytic properties of thermally oxidized copper oxide for efficient solar fuel production

Handle URI:
http://hdl.handle.net/10754/563193
Title:
Photoelectrochemical and electrocatalytic properties of thermally oxidized copper oxide for efficient solar fuel production
Authors:
Garcia Esparza, Angel T. ( 0000-0002-4884-171X ) ; Limkrailassiri, Kevin; Leroy, Frédéric; Rasul, Shahid ( 0000-0002-2543-0205 ) ; Yu, Weili; Lin, Liwei; Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
Abstract:
We report the use of a facile and highly scalable synthesis process to control growth products of earth-abundant Cu-based oxides and their application in relevant photoelectrochemical and electrochemical solar fuel generation systems. Characterization of the synthesized Cu(I)/Cu(II) oxides indicates that their surface morphology and chemical composition can be simply tuned by varying two synthesis parameters (time and temperature). UV-Vis spectroscopy and impedance spectroscopy studies are performed to estimate the band structures and electronic properties of these p-type semiconductor materials. Photoelectrodes made of Cu oxides possess favorable energy band structures for production of hydrogen from water; the position of their conduction band is ≈1 V more negative than the water-reduction potential. High acceptor concentrations on the order of 1018-1019 cm-3 are obtained, producing large electric fields at the semiconductor-electrolyte interface and thereby enhancing charge separation. The highly crystalline pristine samples used as photocathodes in photoelectrochemical cells exhibit high photocurrents under AM 1.5G simulated illumination. When the samples are electrochemically reduced under galvanostatic conditions, the co-existence of the oxide with metallic Cu on the surface seems to function as an effective catalyst for the selective electrochemical reduction of CO2. © the Partner Organisations 2014.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Materials Science and Engineering Program; Catalysis for Energy Conversion (CatEC)
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Journal of Materials Chemistry A
Issue Date:
2014
DOI:
10.1039/c4ta00442f
Type:
Article
ISSN:
20507488
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Materials Science and Engineering Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGarcia Esparza, Angel T.en
dc.contributor.authorLimkrailassiri, Kevinen
dc.contributor.authorLeroy, Frédéricen
dc.contributor.authorRasul, Shahiden
dc.contributor.authorYu, Weilien
dc.contributor.authorLin, Liweien
dc.contributor.authorTakanabe, Kazuhiroen
dc.date.accessioned2015-08-03T11:37:52Zen
dc.date.available2015-08-03T11:37:52Zen
dc.date.issued2014en
dc.identifier.issn20507488en
dc.identifier.doi10.1039/c4ta00442fen
dc.identifier.urihttp://hdl.handle.net/10754/563193en
dc.description.abstractWe report the use of a facile and highly scalable synthesis process to control growth products of earth-abundant Cu-based oxides and their application in relevant photoelectrochemical and electrochemical solar fuel generation systems. Characterization of the synthesized Cu(I)/Cu(II) oxides indicates that their surface morphology and chemical composition can be simply tuned by varying two synthesis parameters (time and temperature). UV-Vis spectroscopy and impedance spectroscopy studies are performed to estimate the band structures and electronic properties of these p-type semiconductor materials. Photoelectrodes made of Cu oxides possess favorable energy band structures for production of hydrogen from water; the position of their conduction band is ≈1 V more negative than the water-reduction potential. High acceptor concentrations on the order of 1018-1019 cm-3 are obtained, producing large electric fields at the semiconductor-electrolyte interface and thereby enhancing charge separation. The highly crystalline pristine samples used as photocathodes in photoelectrochemical cells exhibit high photocurrents under AM 1.5G simulated illumination. When the samples are electrochemically reduced under galvanostatic conditions, the co-existence of the oxide with metallic Cu on the surface seems to function as an effective catalyst for the selective electrochemical reduction of CO2. © the Partner Organisations 2014.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titlePhotoelectrochemical and electrocatalytic properties of thermally oxidized copper oxide for efficient solar fuel productionen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentCatalysis for Energy Conversion (CatEC)en
dc.identifier.journalJournal of Materials Chemistry Aen
dc.contributor.institutionUniv Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USAen
dc.contributor.institutionEcole Natl Super Chim Biol & Phys ENSCBP, Dept Chim Phys Stockage & Convers Energie SCE, F-33607 Pessac, Franceen
kaust.authorRasul, Shahiden
kaust.authorYu, Weilien
kaust.authorTakanabe, Kazuhiroen
kaust.authorGarcia Esparza, Angel T.en
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