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Activating a Low Overpotential CO2 Reduction Mechanism by a Strategic Ligand Modification on a Ruthenium Polypyridyl Catalyst
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
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2016 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 5Article in journal (Refereed) Published
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Abstract [en]

The introduction of a simple methyl substituent on the bipyridine ligand of [Ru(tBu(3)tpy)(bpy)(NCCH3)](2+) (tBu(3)tpy = 4,4',4''-tri-tert-butyl-2,2':6',2''-terpyridine; bpy = 2,2'-bipyridine) gives rise to a highly active electrocatalyst for the reduction of CO2 to CO. The methyl group enables CO2 binding already at the one-electron reduced state of the complex to enter a previously not accessible catalytic cycle that operates at the potential of the first reduction. The complex turns over with a Faradaic efficiency close to unity and at an overpotential that is amongst the lowest ever reported for homogenous CO2 reduction catalysts.

Place, publisher, year, edition, pages
2016. Vol. 55, no 5
Keyword [en]
carbon dioxide reduction, electrocatalysis, overpotential, reaction mechanisms, ruthenium
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-280898DOI: 10.1002/anie.201508490ISI: 000369854000042PubMedID: 26671836OAI: oai:DiVA.org:uu-280898DiVA: diva2:912333
Funder
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg FoundationWenner-Gren Foundations
Available from: 2016-03-16 Created: 2016-03-16 Last updated: 2017-11-30Bibliographically approved

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Johnson, Ben A.Agarwala, HemlataMijangos, EdgarOtt, Sascha

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