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Electrocatalytic Water Oxidation Promoted by 3 D Nanoarchitectured Turbostratic δ-MnOx on Carbon Nanotubes
KTH Royal Institute of Technology, Stockholm, Sweden. (Department of Chemistry)
KTH Royal Institute of Technology, Stockholm, Sweden. (Department of Fibre and Polymer Technology)
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Strukturkemi.
KTH Royal Institute of Technology, Stockholm, Sweden. (Department of Chemistry)
Vise andre og tillknytning
2017 (engelsk)Inngår i: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 10, nr 22, s. 4472-4478Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The development of manganese-based water oxidation electrocatalysts is desirable for the production of solar fuels, as manganese is earth-abundant, inexpensive, non-toxic, and has been employed by the Photosystem II in nature for a billion years. Herein, we directly constructed a 3 D nanoarchitectured turbostratic δ-MnOx on carbon nanotube-modified nickel foam (MnOx/CNT/NF) by electrodeposition and a subsequent annealing process. The MnOx/CNT/NF electrode gives a benchmark catalytic current density (10 mA cm−2) at an overpotential (η) of 270 mV under alkaline conditions. A steady current density of 19 mA cm−2 is obtained during electrolysis at 1.53 V for 1.0 h. To the best of our knowledge, this work represents the most efficient manganese-oxide-based water oxidation electrode and demonstrates that manganese oxides, as a structural and functional model of oxygen-evolving complex (OEC) in Photosystem II, can also become comparable to those of most Ni- and Co-based catalysts.

sted, utgiver, år, opplag, sider
2017. Vol. 10, nr 22, s. 4472-4478
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Kemi
Identifikatorer
URN: urn:nbn:se:uu:diva-337922DOI: 10.1002/cssc.201700824ISI: 000416158500023PubMedID: 28675680OAI: oai:DiVA.org:uu-337922DiVA, id: diva2:1171164
Forskningsfinansiär
Swedish Energy AgencySwedish Research CouncilKnut and Alice Wallenberg FoundationTilgjengelig fra: 2018-01-05 Laget: 2018-01-05 Sist oppdatert: 2018-09-28bibliografisk kontrollert

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