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Article: The effect of crystallinity on photocatalytic performance of Co3O4 water-splitting cocatalysts

TitleThe effect of crystallinity on photocatalytic performance of Co3O4 water-splitting cocatalysts
Authors
Issue Date2016
Citation
Physical Chemistry Chemical Physics, 2016, v. 18, n. 7, p. 5172-5178 How to Cite?
Abstract© 2016 the Owner Societies.Cocatalysts, when loaded onto a water splitting photocatalyst, accelerate the gas evolution reaction and improve the efficiency of the photocatalyst. In this paper, we report that the efficiency of the photocatalyst is enhanced using an amorphous cobalt oxide cocatalyst. The WO3 film, when loaded with amorphous or nanocrystalline Co3O4, shows an improvement of up to 40% in photocurrent generation and 34% in hydrogen gas evolution. The effect of cocatalyst crystallinity on performance was systematically studied, and we found that the photocurrent deteriorates with the conversion of the cocatalyst to a highly crystalline phase at an annealing temperature of 500 °C. The mechanism of this effect was studied in detail using electrochemical impedance spectroscopy, and the enhancement effect produced by the amorphous cocatalyst is attributed to the large density of unsaturated catalytically active sites in the amorphous material.
Persistent Identifierhttp://hdl.handle.net/10722/237521
ISSN
2023 Impact Factor: 2.9
2023 SCImago Journal Rankings: 0.721
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChua, Chin Sheng-
dc.contributor.authorAnsovini, Davide-
dc.contributor.authorLee, Coryl Jing Jun-
dc.contributor.authorTeng, Yin Ting-
dc.contributor.authorOng, Lay Ting-
dc.contributor.authorChi, Dongzhi-
dc.contributor.authorAndy Hor, T. S.-
dc.contributor.authorRaja, Robert-
dc.contributor.authorLim, Yee Fun-
dc.date.accessioned2017-01-16T06:09:25Z-
dc.date.available2017-01-16T06:09:25Z-
dc.date.issued2016-
dc.identifier.citationPhysical Chemistry Chemical Physics, 2016, v. 18, n. 7, p. 5172-5178-
dc.identifier.issn1463-9076-
dc.identifier.urihttp://hdl.handle.net/10722/237521-
dc.description.abstract© 2016 the Owner Societies.Cocatalysts, when loaded onto a water splitting photocatalyst, accelerate the gas evolution reaction and improve the efficiency of the photocatalyst. In this paper, we report that the efficiency of the photocatalyst is enhanced using an amorphous cobalt oxide cocatalyst. The WO3 film, when loaded with amorphous or nanocrystalline Co3O4, shows an improvement of up to 40% in photocurrent generation and 34% in hydrogen gas evolution. The effect of cocatalyst crystallinity on performance was systematically studied, and we found that the photocurrent deteriorates with the conversion of the cocatalyst to a highly crystalline phase at an annealing temperature of 500 °C. The mechanism of this effect was studied in detail using electrochemical impedance spectroscopy, and the enhancement effect produced by the amorphous cocatalyst is attributed to the large density of unsaturated catalytically active sites in the amorphous material.-
dc.languageeng-
dc.relation.ispartofPhysical Chemistry Chemical Physics-
dc.titleThe effect of crystallinity on photocatalytic performance of Co3O4 water-splitting cocatalysts-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/c5cp07589k-
dc.identifier.scopuseid_2-s2.0-84958212233-
dc.identifier.hkuros285672-
dc.identifier.volume18-
dc.identifier.issue7-
dc.identifier.spage5172-
dc.identifier.epage5178-
dc.identifier.isiWOS:000370421500014-
dc.identifier.issnl1463-9076-

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