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Article: A Metal-Free Oxygenated Covalent Triazine 2-D Photocatalyst Works Effectively from the Ultraviolet to Near-Infrared Spectrum for Water Oxidation Apart from Water Reduction

TitleA Metal-Free Oxygenated Covalent Triazine 2-D Photocatalyst Works Effectively from the Ultraviolet to Near-Infrared Spectrum for Water Oxidation Apart from Water Reduction
Authors
Keywordsoxygen doping
covalent triazine frameworks
photocatalytic oxygen production
IR radiation
wide operation window
Issue Date2020
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/page/aaemcq/about.html
Citation
ACS Applied Energy Materials, 2020, v. 3 n. 9, p. 8960-8968 How to Cite?
AbstractSolar-driven water splitting is highly desirable for hydrogen fuel production, particularly if water oxidation is effectively sustained in a complete cycle and/or by means of stable and efficient photocatalysts of main group elements, for example, carbon and nitrogen. Despite extensive success on H2 production on polymer photocatalysts, polymers have met with very limited success for the rate-determining step of the water splitting–water oxidation reaction due to the extremely slow “four-hole” chemistry. Here, the synthesized metal-free oxygenated covalent triazine (OCT) is remarkably active for oxygen production in a wide operation window from UV to visible and even to NIR (up to 800 nm), neatly matching the solar spectrum with an unprecedented external quantum efficiency (even 1% at 600 nm) apart from excellent activity for H2 production under full arc irradiation, a big step moving toward full solar spectrum water splitting. Experimental results and DFT calculations show that the oxygen incorporation not only narrows the band gap but also causes appropriate band-edge shifts. In the end, a controlled small amount of oxygen in the ionothermal reaction is found to be a promising and facile way of achieving such oxygen incorporation. This discovery is a significant step toward both scientific understanding and practical development of metal-free photocatalysts for cost-effective water oxidation and hydrogen generation over a large spectral window.
Persistent Identifierhttp://hdl.handle.net/10722/306686
ISSN
2023 Impact Factor: 5.4
2023 SCImago Journal Rankings: 1.467
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorKong, D-
dc.contributor.authorHan, X-
dc.contributor.authorShevlin, SA-
dc.contributor.authorWindle, C-
dc.contributor.authorWarner, JH-
dc.contributor.authorGuo, ZX-
dc.contributor.authorTang, J-
dc.date.accessioned2021-10-22T07:38:10Z-
dc.date.available2021-10-22T07:38:10Z-
dc.date.issued2020-
dc.identifier.citationACS Applied Energy Materials, 2020, v. 3 n. 9, p. 8960-8968-
dc.identifier.issn2574-0962-
dc.identifier.urihttp://hdl.handle.net/10722/306686-
dc.description.abstractSolar-driven water splitting is highly desirable for hydrogen fuel production, particularly if water oxidation is effectively sustained in a complete cycle and/or by means of stable and efficient photocatalysts of main group elements, for example, carbon and nitrogen. Despite extensive success on H2 production on polymer photocatalysts, polymers have met with very limited success for the rate-determining step of the water splitting–water oxidation reaction due to the extremely slow “four-hole” chemistry. Here, the synthesized metal-free oxygenated covalent triazine (OCT) is remarkably active for oxygen production in a wide operation window from UV to visible and even to NIR (up to 800 nm), neatly matching the solar spectrum with an unprecedented external quantum efficiency (even 1% at 600 nm) apart from excellent activity for H2 production under full arc irradiation, a big step moving toward full solar spectrum water splitting. Experimental results and DFT calculations show that the oxygen incorporation not only narrows the band gap but also causes appropriate band-edge shifts. In the end, a controlled small amount of oxygen in the ionothermal reaction is found to be a promising and facile way of achieving such oxygen incorporation. This discovery is a significant step toward both scientific understanding and practical development of metal-free photocatalysts for cost-effective water oxidation and hydrogen generation over a large spectral window.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/page/aaemcq/about.html-
dc.relation.ispartofACS Applied Energy Materials-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subjectoxygen doping-
dc.subjectcovalent triazine frameworks-
dc.subjectphotocatalytic oxygen production-
dc.subjectIR radiation-
dc.subjectwide operation window-
dc.titleA Metal-Free Oxygenated Covalent Triazine 2-D Photocatalyst Works Effectively from the Ultraviolet to Near-Infrared Spectrum for Water Oxidation Apart from Water Reduction-
dc.typeArticle-
dc.identifier.emailGuo, ZX: zxguo@hku.hk-
dc.identifier.authorityGuo, ZX=rp02451-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1021/acsaem.0c01153-
dc.identifier.pmid33015589-
dc.identifier.pmcidPMC7525806-
dc.identifier.scopuseid_2-s2.0-85094825826-
dc.identifier.hkuros329126-
dc.identifier.volume3-
dc.identifier.issue9-
dc.identifier.spage8960-
dc.identifier.epage8968-
dc.identifier.isiWOS:000576676900089-
dc.publisher.placeUnited States-

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