catalysts Article The Role of Redox Potential and Molecular Structure of Co(II)-Polypyridine Complexes on the Molecular Catalysis of CO2 Reduction Juan Pablo F. Rebolledo-Chávez 1 , Gionnany Teodoro Toral 1, Vanesa Ramírez-Delgado 1, Yolanda Reyes-Vidal 1 , Martha L. Jiménez-González 1, Marisela Cruz-Ramírez 2, Angel Mendoza 3 and Luis Ortiz-Frade 1,* 1 Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C. Parque Tecnológico Querétaro, Departamento de Electroquímica, 76703 Santiago de Querétaro, Mexico;
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[email protected] (G.T.T.);
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[email protected] (M.L.J.-G.) 2 División de Química y Energías Renovables, Universidad Tecnológica de San Juan del Río, 76800 San Juan del Río, Mexico;
[email protected] 3 Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Col. San Manuel, 72570 Puebla, Mexico;
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[email protected] Abstract: In this work, we report the electrochemical response of a family of Co(II) complexes, II 2+ II 2+ [Co (L)3] and [Co (L’)2] (L = 2,2’-bipyridine, 1,10-phenanthroline, 3,4,7,8-tetramethyl-1,10- Citation: Rebolledo-Chávez, J.P.F.; phenanthroline, 5,6-dimethyl-1,10-phenanthroline, and 4,7-diphenyl-1,10-phenanthroline; L’ = ter- Toral, G.T.; Ramírez-Delgado, V.; pyridine and 4-chloro-terpyridine), in the presence and absence of CO2 in order to understand the Reyes-Vidal, Y.; Jiménez-González, role of the redox potential and molecular structure on the molecular catalysis of CO2 reduction.