Photo-electrochemical oxygen evolution reaction by biomimetic CaMn2O4 catalyst

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dc.contributor.authorGagrani, Ankita
dc.contributor.authorAlsultan, Mohammed
dc.contributor.authorSwiegers, Gerhard
dc.contributor.authorTsuzuki, Takuya
dc.date.accessioned2026-01-12T02:31:07Z
dc.date.available2026-01-12T02:31:07Z
dc.date.issued2019
dc.date.updated2023-10-22T07:17:23Z
dc.description.abstractCalcium manganese oxide catalysts are a new class of redox catalysts with significant importance because of their structural similarity to natural oxygen-evolving complex in plant cells and the earth-abundant elemental constituents. In the present study, the photo-electrocatalytic properties of CaMn2O4 in water-splitting were investigated. CaMn2O4 powders with irregular shapes and nanowire shapes were synthesised using mechanochemical processing and a hydrothermal method, respectively. The anode in a photo-electrochemical cell was fabricated by embedding CaMn2O4 powders within polypyrrole. The results showed that CaMn2O4 induced a higher dark and light current in comparison to the control sample (polypyrrole alone). CaMn2O4 nanowires exhibited higher dark and light current in comparison to irregular-shaped CaMn2O4 powders. The difference was attributable to the higher surface area of nanowires compared to the irregular-shaped particles, rather than the difference in exposed crystal facets.
dc.description.sponsorshipAnkita Gagrani would like to recognise the PhD research fellowship from the Australian National University. Access to the facilities of the Centre for Advanced Microscopy (CAM) with funding through the Australian Microscopy and Microanalysis Research Facility (AMMRF) is gratefully acknowledged. MA thanks the Government of Iraq for a PhD scholarship. Support from the Australian Research Council Centre of Excellence Scheme (Project Number CE140100012) is gratefully acknowledged.
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2076-3417
dc.identifier.urihttps://hdl.handle.net/1885/733804011
dc.language.isoen_AUen_AU
dc.provenanceThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
dc.publisherMDPI AG
dc.rights© 2019 by the authors.
dc.rights.licenseCreative Commons Attribution (CC BY) license
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceApplied Sciences
dc.titlePhoto-electrochemical oxygen evolution reaction by biomimetic CaMn2O4 catalyst
dc.typeJournal article
dcterms.accessRightsOpen Access
local.bibliographicCitation.issue11
local.contributor.affiliationGagrani, Ankita, ANU College of Law, ANU
local.contributor.affiliationAlsultan, Mohammed, University of Wollongong
local.contributor.affiliationSwiegers, Gerhard, University of Wollongong
local.contributor.affiliationTsuzuki, Takuya, College of Engineering, Computing and Cybernetics, ANU
local.contributor.authoruidGagrani, Ankita, u5706852
local.contributor.authoruidTsuzuki, Takuya, u5313438
local.description.notesImported from ARIES
local.identifier.absfor340204 - Inorganic green chemistry
local.identifier.absfor401605 - Functional materials
local.identifier.absfor401807 - Nanomaterials
local.identifier.absseo190399 - Mitigation of climate change not elsewhere classified
local.identifier.absseo240699 - Environmentally sustainable manufacturing activities not elsewhere classified
local.identifier.absseo170704 - Hydrogen production from renewable energy
local.identifier.ariespublicationu3102795xPUB3499
local.identifier.citationvolume9
local.identifier.doi10.3390/app9112196
local.identifier.scopusID2-s2.0-85067265604
local.identifier.thomsonIDWOS:000472641200024
local.type.statusPublished Version
publicationvolume.volumeNumber9

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