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dc.contributor.author
Heidari, Sima
dc.contributor.author
Balaghi, S. Esmael
dc.contributor.author
Sologubenko, Alla
dc.contributor.author
Patzke, Greta R.
dc.date.accessioned
2021-05-06T10:15:50Z
dc.date.available
2021-05-01T05:17:44Z
dc.date.available
2021-05-06T10:15:50Z
dc.date.issued
2021-03-05
dc.identifier.issn
2155-5435
dc.identifier.other
10.1021/acscatal.0c03388
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/481831
dc.description.abstract
Earth-abundant, environmentally friendly, and low-cost manganese oxide materials are promising resources for water oxidation catalysts in clean solar fuel applications. We here introduce a convenient and economic method for manufacturing stable and highly efficient manganese-oxide-based anodes for electrochemical water oxidation under neutral conditions. The electrodes were fabricated through thermal decomposition of acidic KMnO4 solution. The phase transitions of the manganese oxide film during calcination and thermal decomposition of KMnO4 were monitored with in situ heating transmission electron microscopy (TEM), in situ heating scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy (STEM/EDX), and in situ heating powder X-ray diffraction (PXRD). In-depth monitoring of formation pathways and phase transformations by in situ techniques under high temperatures shed light upon the fabrication of efficient manganese oxides for energy conversion applications. After parameter optimizations, the best-performing manganese oxide catalyst was applied for water electrolysis for 100 h with a stable current density of 1.0 mA/cm2 at an overpotential of 490 mV in neutral pH. Post operando characterizations of key oxide film properties showed no significant changes. The readily commercially available precursor enables a simple and rapid fabrication method, and the promising stability and high performance of the herein developed electrodes render them quite promising for technological water splitting systems. © 2021 American Chemical Society
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.subject
In situ heating TEM
en_US
dc.subject
XAS
en_US
dc.subject
In situ heating STEM/EDX
en_US
dc.subject
Water oxidation
en_US
dc.subject
Manganese oxide
en_US
dc.subject
Electrocatalysis
en_US
dc.subject
Low-cost transition metals
en_US
dc.title
Economic Manganese-Oxide-Based Anodes for Efficient Water Oxidation: Rapid Synthesis and In Situ Transmission Electron Microscopy Monitoring
en_US
dc.type
Journal Article
dc.date.published
2021-02-11
ethz.journal.title
ACS Catalysis
ethz.journal.volume
11
en_US
ethz.journal.issue
5
en_US
ethz.journal.abbreviated
ACS catal.
ethz.pages.start
2511
en_US
ethz.pages.end
2523
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00003 - Schulleitung und Dienste::00022 - Bereich VP Forschung / Domain VP Research::02891 - ScopeM / ScopeM
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00003 - Schulleitung und Dienste::00022 - Bereich VP Forschung / Domain VP Research::02891 - ScopeM / ScopeM
ethz.date.deposited
2021-05-01T05:18:03Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-05-06T10:16:00Z
ethz.rosetta.lastUpdated
2021-05-06T10:16:00Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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