Selective CO 2 Electroreduction to CO by an Organometallic Nickel Catalyst Featuring a C 3 –Symmetric Tris(Phosphino)Alkyl Ligand
Year: 2026
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide We report a Nickel CO 2 reduction electrocatalyst based on a C 3 -symmetric tris(phosphino)alkyl ligand, CNPPh 3, which displays a metalated axial carbon atom. Catalyst Ni H Br selectively reduces CO 2 to CO (FY CO = 94%) at −2.3 V vs Fc +/0 with a TO F max = 65 s –1 in DMF/[TBA]PF 6 with 3.5 M of added H 2 O. Cyclic voltammetry (CV) and an exhaustive computational study of the reaction mechanism show that our Ni II complex undergoes two one-electron reduction events before the CO 2 binding step. Afterward, the catalytic CO 2 reduction takes place through a reduction-first pathway. The formation of a Ni–CO intermediate along the CO 2 reduction pathway was inferred by CV, and the corresponding [Ni II –CO] + complex was isolated. FTIR spectroelectrochemistry (SEC) allowed for the detection of three different Ni–CO species: [Ni–CO] +, [Ni–CO] 0, and [Ni–CO] − . This work provides critical insights into the electrocatalytic CO 2 reduction, laying the foundation for efficient CO 2 conversion strategies.
Source: ACS Catalysis
Language: English
Field: Energy
Domain: Physical Sciences
SDG: Climate action
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Ministerio de Ciencia, Innovación y Universidades, Centres de Recerca de Catalunya, Generalitat de Catalunya, Institut Català d'Investigació Química, Institut Universitaire de France, Ministerio de Ciencia e Innovación, Horizon 2020 Framework Programme, Agència de Gestió d'Ajuts Universitaris i de Recerca, Agencia Estatal de Investigación, H2020 European Research Council, HORIZON EUROPE Climate, Energy and Mobility
Awards: PHOTOelectrocatalytic systems for Solar fuels energy INTegration into the industry with local resources, G2070502535, G2526912347, G2578815869, G2940166395, G425492372, G4532149078, G4642498202, G5083316332, G5266832481, G5845768719, G5883285439, G6353482543, G6533202671, G6971451092, G7104627343, G7627084824, Towards a Greener Reduction Chemistry by Using Cobalt Coordination Complexes as Catalysts and Light-driven Water Reduction as a Source of Reductive Equivalents, G8571410473, G8689098561, G8920660035
OpenAlex ID: W7127615351