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Title: Role of Bimetallic Interactions in the Enhancement of Catalytic CO2 Reduction by a Macrocyclic Cobalt Catalyst

Journal Article · · ACS Catalysis

The use of two metal centers in a CO2 reduction catalyst that work together synergistically, with similar or complementary functions, can potentially lead to a significant reduction in overpotential, enhance catalytic activity and/or selectivity, and/or enable access to cascade strategies where each metal center catalyzes a different step in the conversion of CO2 to a fuel. Here, the bimetallic reactivity of two metal centers has been identified as the primary route for the reduction of CO2 to CO promoted by the macrocycle, [Co(HMD)]2+ (HMD = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene), based on the experimental characterization of all major steps of the proposed catalytic cycle using pulse radiolysis time-resolved IR (PR-TRIR) spectroscopy, corroborated by density functional theory (DFT) calculations and IR spectroelectrochemistry (IR-SEC). A bimetallic intermediate is formed in situ from two singly reduced [Co(HMD)]+ species bridged by a CO2 molecule, and the presence of a coordinating species, e.g., formate anion, appears to assist in the formation of such an intermediate. In this work, it has been demonstrated that this reactivity enables access to elementary steps with lower energy requirements, resulting in overall catalysis being kinetically more facile compared to the mononuclear pathway. A two-step approach that combines chemical reduction followed by PR-TRIR has been successfully used for probing the structure and reactivity of reactive intermediates involved in the advanced stages of a catalytic cycle, which are rarely interrogated using experimental techniques.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Laser-Electron Accelerator Facility (LEAF)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0012704
OSTI ID:
1844567
Report Number(s):
BNL-222709-2022-JAAM
Journal Information:
ACS Catalysis, Vol. 12, Issue 3; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (45)

Solution studies of the cobalt(II) N-rac- and N-meso-Col2+ isomers and molecular and crystal structures of the low-spin, five-coordinate cobalt(II) macrocyclic complexes N-rac-[CoL(H2O)](ClO4)2.cntdot.0.6H2O (1) and N-rac-[CoL(OC103)]ClO4 (2) (L = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4, 11-diene) journal August 1989
Single-Ion Solvation Free Energies and the Normal Hydrogen Electrode Potential in Methanol, Acetonitrile, and Dimethyl Sulfoxide journal January 2007
Application of Pulse Radiolysis to Mechanistic Investigations of Catalysis Relevant to Artificial Photosynthesis journal October 2017
Supramolecular Assembly Promotes the Electrocatalytic Reduction of Carbon Dioxide by Re(I) Bipyridine Catalysts at a Lower Overpotential journal October 2014
The LEAF picosecond pulse radiolysis facility at Brookhaven National Laboratory journal November 2004
Carbon dioxide activation: thermodynamics of carbon dioxide binding and the involvement of two cobalt centers in the reduction of carbon dioxide by a cobalt(I) macrocycle journal July 1988
Artificial photosynthesis: Catalytic water oxidation and CO2 reduction by dinuclear non-noble-metal molecular catalysts journal December 2018
Electrocatalytic CO 2 Reduction with Cis and Trans Conformers of a Rigid Dinuclear Rhenium Complex: Comparing the Monometallic and Cooperative Bimetallic Pathways journal July 2018
A Dinuclear Cobalt Cryptate as a Homogeneous Photocatalyst for Highly Selective and Efficient Visible‐Light Driven CO 2 Reduction to CO in CH 3 CN/H 2 O Solution journal December 2016
Thermodynamic Hydricity across Solvents: Subtle Electronic Effects and Striking Ligation Effects in Iridium Hydrides journal July 2019
A dinuclear rhenium complex in the electrochemically driven homogeneous and heterogeneous H + /CO 2 -reduction journal January 2020
Absolute Potential of the Standard Hydrogen Electrode and the Problem of Interconversion of Potentials in Different Solvents journal June 2010
Dinuclear Rhenium Complex with a Proton Responsive Ligand as a Redox Catalyst for the Electrochemical CO 2 Reduction journal March 2017
Mechanisms for CO Production from CO 2 Using Reduced Rhenium Tricarbonyl Catalysts journal March 2012
Universal Solvation Model Based on Solute Electron Density and on a Continuum Model of the Solvent Defined by the Bulk Dielectric Constant and Atomic Surface Tensions
  • Marenich, Aleksandr V.; Cramer, Christopher J.; Truhlar, Donald G.
  • The Journal of Physical Chemistry B, Vol. 113, Issue 18, p. 6378-6396 https://doi.org/10.1021/jp810292n
journal May 2009
Co II Cryptates Convert CO 2 into CO and CH 4 under Visible Light journal August 2019
Thermodynamic Analysis of Metal–Ligand Cooperativity of PNP Ru Complexes: Implications for CO 2 Hydrogenation to Methanol and Catalyst Inhibition journal August 2019
A new local density functional for main-group thermochemistry, transition metal bonding, thermochemical kinetics, and noncovalent interactions journal November 2006
Dinuclear Metal Synergistic Catalysis Boosts Photochemical CO 2 -to-CO Conversion journal November 2018
Involvement of a Binuclear Species with the Re−C(O)O−Re Moiety in CO 2 Reduction Catalyzed by Tricarbonyl Rhenium(I) Complexes with Diimine Ligands:  Strikingly Slow Formation of the Re−Re and Re−C(O)O−Re Species from Re(dmb)(CO) 3 S (dmb = 4,4‘-Dimethyl-2,2‘-bipyridine, S = Solvent) journal October 2003
Thermodynamics and kinetics of CO2, CO, and H+ binding to the metal centre of CO2reductioncatalysts journal January 2012
Toward photochemical carbon dioxide activation by transition metal complexes journal May 1994
Hydricities of d 6 Metal Hydride Complexes in Water journal March 2009
Elucidation of the Selectivity of Proton-Dependent Electrocatalytic CO 2 Reduction by fac -Re(bpy)(CO) 3 Cl journal October 2013
Tetraaza-macrocyclic cobalt(II) and nickel(II) complexes as electron-transfer agents in the photo(electro)chemical and electrochemical reduction of carbon dioxide journal January 1984
Energy‐adjusted a b i n i t i o pseudopotentials for the first row transition elements journal January 1987
Selectivity control of CO versus HCOO− production in the visible-light-driven catalytic reduction of CO2 with two cooperative metal sites journal August 2019
Aqueous Hydricity of Late Metal Catalysts as a Continuum Tuned by Ligands and the Medium journal February 2016
Elucidation of Cooperativity in CO 2 Reduction Using a Xanthene-Bridged Bimetallic Rhenium(I) Complex journal December 2020
Efficient and selective electron mediation of cobalt complexes with cyclam and related macrocycles in the p-terphenyl-catalyzed photoreduction of carbon dioxide journal January 1993
Carbon dioxide activation by cobalt(I) macrocycles: factors affecting carbon dioxide and carbon monoxide binding journal January 1991
Aqueous Solvation Free Energies of Ions and Ion−Water Clusters Based on an Accurate Value for the Absolute Aqueous Solvation Free Energy of the Proton journal August 2006
Electrocatalytic reduction of carbon dioxide by using macrocycles of nickel and cobalt journal September 1980
Carbon dioxide activation by cobalt macrocycles: evidence of hydrogen bonding between bound CO2 and the macrocycle in solution journal June 1993
Electrocatalytic reduction of carbon dioxide by 2,2'-bipyridine complexes of rhodium and iridium journal December 1988
Efficient electrocatalytic CO 2 reduction with a molecular cofacial iron porphyrin dimer journal January 2015
Electrochemical Reduction of CO2 Catalyzed by a Dinuclear Palladium Complex Containing a Bridging Hexaphosphine Ligand: Evidence for Cooperativity journal October 1995
Mechanism of the Formation of a Mn-Based CO 2 Reduction Catalyst Revealed by Pulse Radiolysis with Time-Resolved Infrared Detection journal April 2014
Are Two Metal Ions Better than One? Mono‐ and Binuclear α‐Diimine‐Re(CO) 3 Complexes with Proton‐Responsive Ligands in CO 2 Reduction Catalysis journal March 2019
Development of nanosecond time-resolved infrared detection at the LEAF pulse radiolysis facility journal April 2015
The synergistic catalysis effect within a dinuclear nickel complex for efficient and selective electrocatalytic reduction of CO 2 to CO journal January 2018
Crystallization and structure of a binuclear species containing the CoC(OH)OCo moiety journal January 2000
Photochemical CO 2 Reduction Using Rhenium(I) Tricarbonyl Complexes with Bipyridyl‐Type Ligands with and without Second Coordination Sphere Effects journal May 2021
Electrocatalytic reduction of CO2 using the dinuclear rhenium(I) complex [ReCl(CO)3(μ-tptzH)Re(CO)3] journal November 2015
Molecular Approaches to the Photocatalytic Reduction of Carbon Dioxide for Solar Fuels journal December 2009