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Selectivity Control of Oxygen Reduction Reaction over Mesoporous Transition Metal Oxide Catalysts for Electrified Purification Technologies
Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0002-6017-6353
Linköpings universitet, Institutionen för teknik och naturvetenskap, Laboratoriet för organisk elektronik. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0001-8478-4663
Linköpings universitet, Institutionen för fysik, kemi och biologi, Plasma och ytbeläggningsfysik. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0002-6602-7981
Linköpings universitet, Institutionen för teknik och naturvetenskap, Laboratoriet för organisk elektronik. Linköpings universitet, Tekniska fakulteten.
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2023 (engelsk)Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 15, nr 21, s. 26093-26103Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC , 2023. Vol. 15, nr 21, s. 26093-26103
Emneord [en]
oxygen reduction reaction; oxygen evolution reaction; oxygen on demand; mesoporous oxides; nickel(II)oxide; nickel cobaltite; hydroxyl radical
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Identifikatorer
URN: urn:nbn:se:liu:diva-196108DOI: 10.1021/acsami.3c01196ISI: 001014377200001PubMedID: 37204834OAI: oai:DiVA.org:liu-196108DiVA, id: diva2:1780121
Merknad

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]

Tilgjengelig fra: 2023-07-05 Laget: 2023-07-05 Sist oppdatert: 2024-02-09

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