Issue 42, 2023

Co-electrocatalytic CO2 reduction mediated by a dibenzophosphole oxide and a chromium complex

Abstract

We report a co-electrocatalytic system for the selective reduction of CO2 to CO, comprised of a previously reported molecular Cr complex and 5-phenylbenzo[b]phosphindole-5-oxide (PhBPO) as a redox mediator. Under protic conditions, the co-electrocatalytic system attains a turnover frequency (TOF) of 15 s−1 and quantitative selectivity for CO. It is proposed that PhBPO interacts with the Cr-based catalyst, coordinating in an axial position trans to an intermediate hydroxycarbonyl species, M–CO2H, mediating electron transfer to the catalyst and lowering the barrier for C–OH bond cleavage.

Graphical abstract: Co-electrocatalytic CO2 reduction mediated by a dibenzophosphole oxide and a chromium complex

Associated articles

Supplementary files

Article information

Article type
Communication
Submitted
11 Jan 2023
Accepted
25 Apr 2023
First published
25 Apr 2023
This article is Open Access
Creative Commons BY-NC license

Chem. Commun., 2023,59, 6359-6362

Co-electrocatalytic CO2 reduction mediated by a dibenzophosphole oxide and a chromium complex

C. A. Koellner, A. G. Reid and C. W. Machan, Chem. Commun., 2023, 59, 6359 DOI: 10.1039/D3CC00166K

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