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Photoelectrochemical reduction of CO2: Stabilization and enhancement of activity of copper(I) oxide semiconductor by over-coating with tungsten carbide and carbide-derived carbons

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dc.abstract.enHybrid photocathode materials, which are composed of hierarchically deposited (onto the transparent fluorine-doped conducting glass electrode) copper(I) oxide (inner layer) and robust carbon structures, such as carbide derived carbons (CDC) or mixture of CDC with 70% (weight) tungsten carbide (WC-CDC), have been fabricated and examined using electrochemical methods, X-ray diffraction and various spectroscopic approaches including Raman technique. The resulting systems have been characterized by good stability and have exhibited high photoelectrochemical activity toward reduction of CO2 upon illumination with sunlight in the Na2SO4 neutral medium. While the semiconducting properties of Cu2O are not largely affected by the interfacial modification with CDC and WC-CDC, the photostability of the hybrid photocathode is significantly improved. The stabilization effect should reflect the capacitive properties of CDC and WC-CDC. The capability of CDC and WC-CDC over-layers to undergo efficient double-layer-type charging/discharging should facilitate collection and transport of photoelectrons and inhibit recombination of photogenerated electron-hole pairs. The relatively higher photoelectrochemical activity of the Cu2O system over-coated with WC-CDC, relative to the one containing CDC only, seems to reflect specific interactions between CO2 and WC-CDC thus inducing reduction of CO2 adsorbates.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorTallo, Indrek
dc.contributor.authorRutkowska, Iwona
dc.contributor.authorKulesza, Paweł
dc.contributor.authorSzaniawska, Ewelina
dc.contributor.authorSeta, Ewelina
dc.contributor.authorLust, Enn
dc.date.accessioned2024-01-25T16:36:29Z
dc.date.available2024-01-25T16:36:29Z
dc.date.issued2020
dc.description.financePublikacja bezkosztowa
dc.description.volume341
dc.identifier.doi10.1016/J.ELECTACTA.2020.136054
dc.identifier.issn0013-4686
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/115829
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrochimica Acta
dc.relation.pages136054
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enCO2 reduction
dc.subject.enPhotoelectrochemistry
dc.subject.enCuprous oxide p-type semiconductor
dc.subject.enCarbides and carbide-derived carbons
dc.subject.enCapacitive properties
dc.subject.enActivation and stabilization
dc.titlePhotoelectrochemical reduction of CO2: Stabilization and enhancement of activity of copper(I) oxide semiconductor by over-coating with tungsten carbide and carbide-derived carbons
dc.typeJournalArticle
dspace.entity.typePublication