ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
0/0

Cobaloxime-Based Double Complex Salts as Efficient and Versatile Catalysts for the Light-Driven Hydrogen Evolution Reaction

preprint
submitted on 07.01.2020 and posted on 08.01.2020 by Elisabeth Hofmeister, Jisoo Woo, Tobias Ullrich, Lydia Petermann, Kevin Hanus, Sven Rau, Axel Kahnt, Max von Delius
Cobaloximes and their BF2-bridged analogues have emerged as promising non-noble metal catalysts for the photocatalytic hydrogen evolution reaction (HER). Herein we report the serendipitous discovery that double complex salts such as [Co(dmgh)2py2]+[Co(dmgBPh2)2Cl2]- can be obtained in good yields by treatment of commercially available [Co(dmgh)2pyCl] with triarylboranes. A systematic study on the use of such double complex salts and their single salts with simple counterions as photocatalysts revealed HER activities comparable or superior to existing cobaloxime catalysts and suggests ample opportunities for this compound class in catalyst/photosensitizer dyads and immobilized architectures. Preliminary electrochemical and spectroscopic studies indicate that one key advantage of these charged cobalt complexes is that the reduction potentials as well as the electrostatic interaction with charged photosensitizers can be tuned.

Funding

Deutsche Forschungsgemeinschaft (DFG – German Research Foundation) – project number 364549901 – TRR 234

History

Email Address of Submitting Author

max.vondelius@uni-ulm.de

Institution

University of Ulm

Country

Germany

ORCID For Submitting Author

0000-0003-1852-2969

Declaration of Conflict of Interest

no conflict of interest

Exports

Logo branding

Exports