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Ryu, Jungki
Bioinspired Functional Materials Lab.
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dc.citation.endPage 799 -
dc.citation.number 8 -
dc.citation.startPage 7990 -
dc.citation.volume 11 - Bae, Sanghyun - Kim, Hyunwoo - Jeon, Dasom - Ryu, Jungki - 2023-12-21T19:38:15Z - 2023-12-21T19:38:15Z - 2019-02-21 - 2019-02 -
dc.description.abstract We studied the kinetics of photoelectrochemical (PEC) water oxidation using a model photoanode BiVO4 modified with various water oxidation catalysts (WOCs) by electrochemical impedance spectroscopy. In particular, we prepared BiVO4 photoanodes with catalytic multilayers (CMs), where cationic polyelectrolytes and anionic polyoxometalate (POM) WOCs were assembled in a desired amount at a nanoscale precision, and compared their performance with those with well-known WOCs such as cobalt phosphate (CoPi) and NiOOH. Our comparative kinetics analysis suggested that the deposition of the CMs improved the kinetics of both the photogenerated charge carrier separation/transport in bulk BiVO4 due to passivation of surface recombination centers and water oxidation at the electrode/electrolyte interface due to deposition of efficient molecular WOCs. On the contrary, the conventional WOCs were mostly effective in the former and less effective in the latter, which is consistent with previous reports. These findings explain why the CMs exhibit an outstanding performance. We also found that separated charge carriers can be efficiently transported to POM WOCs via a hopping mechanism due to the delicate architecture of the CMs, which is reminiscent of natural photosynthetic systems. We believe that this study can not only broaden our understanding on the underlying mechanism of PEC water oxidation but also provide insights for the design and fabrication of novel electrochemical and PEC devices, including efficient water oxidation photoanodes. -
dc.identifier.bibliographicCitation ACS APPLIED MATERIALS & INTERFACES, v.11, no.8, pp.7990 - 799 -
dc.identifier.doi 10.1021/acsami.8b20785 -
dc.identifier.issn 1944-8244 -
dc.identifier.scopusid 2-s2.0-85062370838 -
dc.identifier.uri -
dc.identifier.url -
dc.identifier.wosid 000460365300036 -
dc.language 영어 -
dc.publisher American Chemical Society (ACS) -
dc.title Catalytic Multilayers for Efficient Solar Water Oxidation through Catalyst Loading and Surface-State Passivation of BiVO4 Photoanodes -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Nanoscience & Nanotechnology; Materials Science, Multidisciplinary -
dc.relation.journalResearchArea Science & Technology - Other Topics; Materials Science -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor electrochemical impedance spectroscopy -
dc.subject.keywordAuthor photoanodes -
dc.subject.keywordAuthor solar water oxidation -
dc.subject.keywordAuthor water oxidation catalysts -
dc.subject.keywordAuthor water oxidation kinetics -
dc.subject.keywordPlus HEMATITE PHOTOELECTRODES -
dc.subject.keywordPlus CHARGE SEPARATION -
dc.subject.keywordPlus PHOTOSYNTHESIS -
dc.subject.keywordPlus NANOPARTICLES -
dc.subject.keywordPlus PHOTOCURRENT -
dc.subject.keywordPlus PERFORMANCE -


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