Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 26, Pages 7388-7392Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201601038
Keywords
carbon dioxide; electrocatalysis; hybrid materials; manganese; reduction
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Funding
- EPSRC
- Christian Doppler Research Association (Austrian Federal Ministry of Science, Research and Economy)
- Christian Doppler Research Association (National Foundation for Research, Technology and Development)
- OMV Group
- EPSRC [EP/H00338X/1, EP/H00338X/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H00338X/2, EP/H00338X/1, 1235150] Funding Source: researchfish
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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 vertical bar 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 vertical bar MnP cathode with a CdS-sensitized photoanode to enable solar-light-driven CO2 reduction with the light-sensitive MnP catalyst.
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