Monitoring structure and coordination chemistry of Co4O4-based oxygen evolution catalysts by nitrogen-14/-15 and cobalt-59 NMR spectroscopy

Felix Uhlig; Michael B Stammler; Florian Meurer; Ilya G Shenderovich; Jan Blahut; Florian M Wisser

doi:10.1039/d4dt01273a

Monitoring structure and coordination chemistry of Co₄O₄-based oxygen evolution catalysts by nitrogen-14/-15 and cobalt-59 NMR spectroscopy

Dalton Trans. 2024 May 21;53(20):8541-8545. doi: 10.1039/d4dt01273a.

Authors

Felix Uhlig¹, Michael B Stammler¹, Florian Meurer^{1

2}, Ilya G Shenderovich³, Jan Blahut⁴, Florian M Wisser^{1

5}

Affiliations

¹ University of Regensburg, Institute of Inorganic Chemistry, Universitätsstraße 31, 93053 Regensburg, Germany. [email protected].
² Rossendorf Beamline, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.
³ University of Regensburg, Institute of Organic Chemistry, Universitätsstraße 31, 93040 Regensburg, Germany.
⁴ Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10, Prague 6, Czech Republic. [email protected].
⁵ Erlangen Center for Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany.

PMID: 38712528
DOI: 10.1039/d4dt01273a

Abstract

The structural features of cobalt-based oxygen evolution catalysts are elucidated by combining high-field MAS NMR spectroscopy and DFT calculations. The superior photocatalytic activity of the heterogeneous system over its homogeneous counterpart is rationalised by the structural features. The higher activity is caused by a more favourable electron-withdrawing character of the framework.