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Article: Confined Synthesis: From Layered Titanate To Highly Efficient And Durable Mesoporous Cu/tio2 Hydrogen Evolution Photocatalysts

TitleConfined Synthesis: From Layered Titanate To Highly Efficient And Durable Mesoporous Cu/tio2 Hydrogen Evolution Photocatalysts
Authors
Keywordsintercalation
copper nanoparticle
titanium dioxide
mesoporous photocatalytic hydrogen evolution reaction
Issue Date2021
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/page/aaemcq/about.html
Citation
ACS Applied Energy Materials, 2021, v. 4 n. 4, p. 4050-4058 How to Cite?
AbstractHighly efficient, durable, and earth-abundant photocatalysts are of great interest toward practical photocatalytic conversion reactions, such as hydrogen generation and CO2 reduction. In this work, the intercalation and confinement of “copper ions” within layered titanate nanosheets enabled preparation of copper-modified TiO2 mesoporous spheres (Cu/TiO2), which contain well-dispersed small copper nanoparticles with a diameter of approximately 3–5 nm over the TiO2 mesoporous spheres. Without a cocatalyst (e.g., Pt), the obtained samples exhibited superior photocatalytic hydrogen evolution reaction (HER) activity (13.45 mmol/g/h) and excellent durability during a cyclic HER testing for 120 h, compared against 2.41 mmol/g/h of Cu-modified P25 TiO2. Computational simulations suggest that the Fermi level of small copper nanoparticles is located between the conduction band of TiO2 and the H+/H2 reduction potential, and if extrapolated to nanoparticles, then this holds for particles up to approximately 9 nm. This would efficiently facilitate electron trapping and then transfer from TiO2 to copper followed by the reduction reaction, leading to excellent photocatalytic H2 evolution reaction.
Persistent Identifierhttp://hdl.handle.net/10722/306488
ISSN
2023 Impact Factor: 5.4
2023 SCImago Journal Rankings: 1.467
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCui, L-
dc.contributor.authorXu, Y-
dc.contributor.authorFan, J-
dc.contributor.authorYuan, P-
dc.contributor.authorSun, C-
dc.contributor.authorGuo, Z-
dc.contributor.authorZhang, XL-
dc.contributor.authorCaruso, RA-
dc.date.accessioned2021-10-22T07:35:20Z-
dc.date.available2021-10-22T07:35:20Z-
dc.date.issued2021-
dc.identifier.citationACS Applied Energy Materials, 2021, v. 4 n. 4, p. 4050-4058-
dc.identifier.issn2574-0962-
dc.identifier.urihttp://hdl.handle.net/10722/306488-
dc.description.abstractHighly efficient, durable, and earth-abundant photocatalysts are of great interest toward practical photocatalytic conversion reactions, such as hydrogen generation and CO2 reduction. In this work, the intercalation and confinement of “copper ions” within layered titanate nanosheets enabled preparation of copper-modified TiO2 mesoporous spheres (Cu/TiO2), which contain well-dispersed small copper nanoparticles with a diameter of approximately 3–5 nm over the TiO2 mesoporous spheres. Without a cocatalyst (e.g., Pt), the obtained samples exhibited superior photocatalytic hydrogen evolution reaction (HER) activity (13.45 mmol/g/h) and excellent durability during a cyclic HER testing for 120 h, compared against 2.41 mmol/g/h of Cu-modified P25 TiO2. Computational simulations suggest that the Fermi level of small copper nanoparticles is located between the conduction band of TiO2 and the H+/H2 reduction potential, and if extrapolated to nanoparticles, then this holds for particles up to approximately 9 nm. This would efficiently facilitate electron trapping and then transfer from TiO2 to copper followed by the reduction reaction, leading to excellent photocatalytic H2 evolution reaction.-
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.subjectintercalation-
dc.subjectcopper nanoparticle-
dc.subjecttitanium dioxide-
dc.subjectmesoporous photocatalytic hydrogen evolution reaction-
dc.titleConfined Synthesis: From Layered Titanate To Highly Efficient And Durable Mesoporous Cu/tio2 Hydrogen Evolution Photocatalysts-
dc.typeArticle-
dc.identifier.emailGuo, Z: zxguo@hku.hk-
dc.identifier.authorityGuo, Z=rp02451-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acsaem.1c00407-
dc.identifier.scopuseid_2-s2.0-85104947583-
dc.identifier.hkuros329017-
dc.identifier.volume4-
dc.identifier.issue4-
dc.identifier.spage4050-
dc.identifier.epage4058-
dc.identifier.isiWOS:000644737800112-
dc.publisher.placeUnited States-

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