Graphene Bridge for Photocatalytic Hydrogen Evolution with Gold Nanocluster Co-Catalysts

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dc.contributor.authorMousavi, H.
dc.contributor.authorSmall, T.D.
dc.contributor.authorSharma, S.K.
dc.contributor.authorGolovko, V.B.
dc.contributor.authorShearer, C.J.
dc.contributor.authorMetha, G.F.
dc.date.issued2022
dc.descriptionPublished: 17 October 2022
dc.description.abstractHerein, the UV light photocatalytic activity of an Au101NC-AlSrTiO3-rGO nanocomposite comprising 1 wt% rGO, 0.05 wt% Au101(PPh3)21Cl5 (Au101NC), and AlSrTiO3 evaluated for H2 production. The synthesis of Au101NC-AlSrTiO3-rGO nanocomposite followed two distinct routes: (1) Au101NC was first mixed with AlSrTiO3 followed by the addition of rGO (Au101NC-AlSrTiO3:rGO) and (2) Au101NC was first mixed with rGO followed by the addition of AlSrTiO3 (Au101NC-rGO:AlSrTiO3). Both prepared samples were annealed in air at 210 °C for 15 min. Inductively coupled plasma mass spectrometry and high-resolution scanning transmission electron microscopy showed that the Au101NC adhered almost exclusively to the rGO in the nanocomposite and maintained a size less than 2 nm. Under UV light irradiation, the Au101NC-AlSrTiO3:rGO nanocomposite produced H2 at a rate 12 times greater than Au101NC-AlSrTiO3 and 64 times greater than AlSrTiO3. The enhanced photocatalytic activity is attributed to the small particle size and high loading of Au101NC, which is achieved by non-covalent binding to rGO. These results show that significant improvements can be made to AlSrTiO3-based photocatalysts that use cluster co-catalysts by the addition of rGO as an electron mediator to achieve high cluster loading and limited agglomeration of the clusters.
dc.description.statementofresponsibilityHanieh Mousavi, Thomas D. Small, Shailendra K. Sharma, Vladimir B. Golovko, Cameron J. Shearer and Gregory F. Metha
dc.identifier.citationNanomaterials, 2022; 12(20):3638-1-3638-13
dc.identifier.doi10.3390/nano12203638
dc.identifier.issn2079-4991
dc.identifier.issn2079-4991
dc.identifier.orcidSmall, T.D. [0000-0001-9978-5490]
dc.identifier.orcidShearer, C.J. [0000-0002-8192-3696]
dc.identifier.orcidMetha, G.F. [0000-0003-1094-0947]
dc.identifier.urihttps://hdl.handle.net/2440/136882
dc.language.isoen
dc.publisherMDPI AG
dc.relation.granthttp://purl.org/au-research/grants/arc/FT190100854
dc.rights© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
dc.source.urihttps://doi.org/10.3390/nano12203638
dc.subjectgold nanocluster; reduced graphene oxide; SrTiO3; photocatalysis; hydrogen evolution reaction
dc.titleGraphene Bridge for Photocatalytic Hydrogen Evolution with Gold Nanocluster Co-Catalysts
dc.typeJournal article
pubs.publication-statusPublished

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