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dc.contributor.authorZhang, H.
dc.contributor.authorTian, W.
dc.contributor.authorLi, Y.
dc.contributor.authorSun, Hongqi
dc.contributor.authorTade, Moses
dc.contributor.authorWang, Shaobin
dc.date.accessioned2019-02-19T04:15:45Z
dc.date.available2019-02-19T04:15:45Z
dc.date.created2019-02-19T03:58:25Z
dc.date.issued2018
dc.identifier.citationZhang, H. and Tian, W. and Li, Y. and Sun, H. and Tade, M. and Wang, S. 2018. A comparative study of metal (Ni, Co, or Mn)-borate catalysts and their photodeposition on rGO/ZnO nanoarrays for photoelectrochemical water splitting. Journal of Materials Chemistry A. 6 (47): pp. 24149-24156.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/74101
dc.identifier.doi10.1039/c8ta06921b
dc.description.abstract

Feasible and efficient photoelectrochemical (PEC) water splitting demands a rational integration of solar light absorbers with active electrocatalysts. Herein, we first compare three amorphous metal-borates (M-Bi, M = Ni, Co, Mn) as low-cost electrocatalysts, among which Mn-Bi is proposed for the first time for fabrication of new PEC devices for oxygen evolution reaction (OER). Density functional theory (DFT) calculations compared the catalytic activity of the effective structures in M-Bi and found that NiO6 possesses kinetically the lowest overall OER energy barrier. Experimentally, M-Bi thin layers were self-assembled on reduced graphene oxide (rGO) linked ZnO nanorod arrays respectively, to form a highly efficient ternary PEC system (M-Bi/rGO/ZnO) using a modified photodeposition method. rGO facilitates the fast charge separation in light-absorbing ZnO NAs, while M-Bi (M = Ni, Co, Mn) can improve the kinetics of OER. In accordance with DFT results, Ni-Bi serves as the most active electrocatalyst in such a PEC device, followed by Co-Bi and Mn-Bi. Compared to ZnO, the photoelectroconversion efficiency is elevated by approximately 4 times on Ni-Bi/rGO/ZnO, with its onset potential migrated by 0.17 V in the cathodic direction under one sun illumination.

dc.publisherR S C Publications
dc.titleA comparative study of metal (Ni, Co, or Mn)-borate catalysts and their photodeposition on rGO/ZnO nanoarrays for photoelectrochemical water splitting
dc.typeJournal Article
dcterms.source.volume6
dcterms.source.number47
dcterms.source.startPage24149
dcterms.source.endPage24156
dcterms.source.issn2050-7488
dcterms.source.titleJournal of Materials Chemistry A
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusFulltext not available


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