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https://hdl.handle.net/2440/117738
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dc.contributor.author | Zhang, H. | - |
dc.contributor.author | Tian, W. | - |
dc.contributor.author | Li, Y. | - |
dc.contributor.author | Sun, H. | - |
dc.contributor.author | Tadé, M. | - |
dc.contributor.author | Wang, S. | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Journal of Materials Chemistry A, 2018; 6(47):24149-24156 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.issn | 2050-7496 | - |
dc.identifier.uri | http://hdl.handle.net/2440/117738 | - |
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.description.statementofresponsibility | Huayang Zhang, Wenjie Tian, Yunguo Li, Hongqi Sun, Moses O. Tadéa and Shaobin Wang | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.rights | This journal is © The Royal Society of Chemistry 2018 | - |
dc.source.uri | http://dx.doi.org/10.1039/c8ta06921b | - |
dc.title | A comparative study of metal (Ni, Co, or Mn)-borate catalysts and their photodeposition on rGO/ZnO nanoarrays for photoelectrochemical water splitting | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1039/c8ta06921b | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP150103026 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/LE120100026 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Tian, W. [0000-0002-9896-1154] | - |
dc.identifier.orcid | Wang, S. [0000-0002-1751-9162] | - |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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