Abstract
Electrocatalytic CO2 reduction to CO was achieved with a novel Mn complex, fac‐[MnBr(4,4′‐bis(phosphonic acid)‐2,2′‐bipyridine)(CO)3] (MnP), immobilized on a mesoporous TiO2 electrode. A benchmark turnover number of 112±17 was attained with these TiO2|MnP electrodes after 2 h electrolysis. Post‐catalysis IR spectroscopy demonstrated that the molecular structure of the MnP catalyst was retained. UV/vis spectroscopy confirmed that an active Mn–Mn dimer was formed during catalysis on the TiO2 electrode, showing the dynamic formation of a catalytically active dimer on an electrode surface. Finally, we combined the light‐protected TiO2|MnP cathode with a CdS‐sensitized photoanode to enable solar‐light‐driven CO2 reduction with the light‐sensitive MnP catalyst.
Highlights
Electrocatalytic CO2 reduction to CO was achieved with a novel Mn complex, fac-[MnBr(4,4’-bis(phosphonic acid)-2,2’-bipyridine)(CO)3] (MnP), immobilized on a mesoporous TiO2 electrode
A benchmark turnover number of 112 Æ 17 was attained with these TiO2 j MnP electrodes after 2 h electrolysis
Post-catalysis IR spectroscopy demonstrated that the molecular structure of the MnP catalyst was retained
Summary
Abstract: Electrocatalytic CO2 reduction to CO was achieved with a novel Mn complex, fac-[MnBr(4,4’-bis(phosphonic acid)-2,2’-bipyridine)(CO)3] (MnP), immobilized on a mesoporous TiO2 electrode. We present a novel MnI CO2 reduction electrocatalyst with a phosphonate functionality (MnP, Scheme 1) that allows anchoring and direct wiring between the catalytic center and a metal oxide surface,[15] as has been achieved for an analogous phosphonate-modified Re complex.[16] We employ a mesoporous TiO2 electrode, because it offers 1) long-term stability and conductivity under reducing conditions,[17] 2) a three-dimensional morphology for high cata-
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
