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Substituents Effects on the Electrocatalytic CO2 Reduction by Cobalt Corroles in Solution

Year: 2025

Type: article

Abstract: Electrochemical CO2 reduction catalysis with cobalt corrole complexes in solution is reported. Corroles have attracted attention as contracted and trianionic tetrapyrrolic macrocycles that can be compared to leading porphyrin catalysts for CO2 reduction, but most studies focus on heterogenized systems with poorly defined electrochemical responses. Electrochemical studies of cobalt corroles bearing axial triphenylphosphine ligands to ensure solubility are reported. The voltammetry provides mechanistic insights supporting CO2 activation after the formal CoII/CoI reduction. The series of cobalt complexes, including a newly designed corrole with mixed perfluorophenyl/ortho-dimethoxyphenyl substituent pattern, provide evidence for electron-rich catalysts having stronger interactions with CO2. The primary product of CO2 reduction is CO, formed at a rate of ca. 90 s-1.

Source: Carolina Digital Repository (University of North Carolina at Chapel Hill)

DOI: 10.17615/s4zb-eq13

Authors: Mahammed, Atif, Gross, Zeev, Saltsman, Irena, Fridman, Natalia, Miller, Alexander J M, Fernández, Sergio, Kumar, Sachin

Institution: University of North Carolina at Chapel Hill

Language: English

Topic: CO2 Reduction Techniques and Catalysts

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

Open Access status: green

Funders: Fundación Ramón Areces, Ministry of Science, Technology and Space, Council for Higher Education, Basic Energy Sciences

OpenAlex ID: W4416224232

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