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Updated: Apr 29, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Homogeneous redox catalysed reduction of CO2 by nickel cyclam catalyst and chromium-based redox mediator
Mark Potter1, Kathryn E Toghill1
1Department of Chemistry, Lancaster University, Lancaster, LA1 4YB, UK. k.toghill@lancaster.ac.uk.
Abstract:
The electrochemically decoupled reduction of CO2 using nickel cyclam as a homogeneous catalyst and chromium propanediaminetetraacetate (PDTA) as a reductive redox mediator is reported in aqueous media. Uniquely, the Ni cyclam catalyst, known for exclusive homogenous CO production instead gives a mixed product selection of HCOO(H) and CO depending on the supporting electrolyte composition, with KHCO3 favouring CO and KCl favouring HCOO(H). The CrPDTA shows no conventional electrochemical booster effects, but exclusively reacts with the Ni cyclam when generated as a bulk Cr(II) species.
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