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Selectivity Control of Oxygen Reduction Reaction over Mesoporous Transition Metal Oxide Catalysts for Electrified Purification Technologies
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-6017-6353
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-8478-4663
Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-6602-7981
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
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2023 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 15, no 21, p. 26093-26103Article in journal (Refereed) Published
Abstract [en]

Direct electrification of oxygen-associated reactionscontributesto large-scale electrical storage and the launch of the green hydrogeneconomy. The design of the involved catalysts can mitigate the electricalenergy losses and improve the control of the reaction products. Weevaluate the effect of the interface composition of electrocatalystson the efficiency and productivity of the oxygen reduction reaction(ORR) and oxygen evolution reaction (OER), both mechanistically andat device levels. The ORR and OER were benchmarked on mesoporous nickel-(II)oxide and nickel cobaltite (NiO and NiCo2O4,respectively) obtained by a facile template-free hydrothermal synthesis.Physicochemical characterization showed that both NiO and NiCo2O4 are mesoporous and have a cubic crystal structurewith abundant surface hydroxyl species. NiCo2O4 showed higher electrocatalytic activity in OER and selectivity towater as the terminal product of ORR. On the contrary, ORR over NiOyielded hydroxyl radicals as products of a Fenton-like reaction ofH(2)O(2). The product selectivity in ORR was usedto construct two electrolyzers for electrified purification of oxygenand generation of hydroxyl radicals.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2023. Vol. 15, no 21, p. 26093-26103
Keywords [en]
oxygen reduction reaction; oxygen evolution reaction; oxygen on demand; mesoporous oxides; nickel(II)oxide; nickel cobaltite; hydroxyl radical
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URN: urn:nbn:se:liu:diva-196108DOI: 10.1021/acsami.3c01196ISI: 001014377200001PubMedID: 37204834OAI: oai:DiVA.org:liu-196108DiVA, id: diva2:1780121
Note

Funding Agencies|competence center FunMat-II - Swedish Agency for Innovation Systems (Vinnova) [2016-05156]; Swedish Energy Agency [42022-1]; Swedish Research Council [VR 2019-05577]

Available from: 2023-07-05 Created: 2023-07-05 Last updated: 2024-02-09

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