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Electroreduction of CO 2 Catalyzed by a Heterogenized Zn–Porphyrin Complex with a Redox-Innocent Metal Center

Journal Article · · ACS Central Science
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [2];  [1]
  1. Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States; Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
  2. School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, United States
  3. Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
Transition-metal-based molecular complexes are a class of catalyst materials for electrochemical CO2 reduction to CO that can be rationally designed to deliver high catalytic performance. One common mechanistic feature of these electrocatalysts developed thus far is an electrogenerated reduced metal center associated with catalytic CO2 reduction. Here we report a heterogenized zinc–porphyrin complex (zinc(II) 5,10,15,20-tetramesitylporphyrin) as an electrocatalyst that delivers a turnover frequency as high as 14.4 site–1 s–1 and a Faradaic efficiency as high as 95% for CO2 electroreduction to CO at -1.7 V vs the standard hydrogen electrode in an organic/water mixed electrolyte. While the Zn center is critical to the observed catalysis, in situ and operando X-ray absorption spectroscopic studies reveal that it is redox-innocent throughout the potential range. Cyclic voltammetry indicates that the porphyrin ligand may act as a redox mediator. Chemical reduction of the zinc–porphyrin complex further confirms that the reduction is ligand-based and the reduced species can react with CO2. This represents the first example of a transition-metal complex for CO2 electroreduction catalysis with its metal center being redox-innocent under working conditions.
Research Organization:
Yale Univ., New Haven, CT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF); American Chemical Society Petroleum Research Fund; Institute of International Education (IIE); TomKat Foundation; Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division and Advanced Photon Source; Dupont Research and Development, Wilmington, DE (United States). DuPont Experimental Station; Northwestern Univ., Evanston, IL (United States); Oregon State Univ., Corvallis, OR (United States); Netherlands Organization for Scientific Research (NWO)
DOE Contract Number:
FG02-07ER15909; AC02-06CH11357
OSTI ID:
1397287
Journal Information:
ACS Central Science, Journal Name: ACS Central Science Journal Issue: 8 Vol. 3; ISSN 2374-7943
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH

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A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting journal January 2018
Local ionic liquid environment at a modified iron porphyrin catalyst enhances the electrocatalytic performance of CO 2 to CO reduction in water journal January 2018
Artificial photosynthesis: opportunities and challenges of molecular catalysts journal January 2019
Heterogeneous molecular catalysts for electrocatalytic CO2 reduction journal May 2019
Selective CO 2 Reduction on 2D Mesoporous Bi Nanosheets journal October 2018
Active sites of copper-complex catalytic materials for electrochemical carbon dioxide reduction journal January 2018
Electrocatalytic CO 2 reduction with nickel complexes supported by tunable bipyridyl-N-heterocyclic carbene donors: understanding redox-active macrocycles journal January 2018
Mechanisms of catalytic reduction of CO 2 with heme and nonheme metal complexes journal January 2018
A Porphyrin/Graphene Framework: A Highly Efficient and Robust Electrocatalyst for Carbon Dioxide Reduction journal July 2018
Boosting Electrochemical CO 2 Reduction on Metal–Organic Frameworks via Ligand Doping journal March 2019
Static Regulation and Dynamic Evolution of Single‐Atom Catalysts in Thermal Catalytic Reactions journal November 2018
A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting text January 2018
Molecular Nitrogen-Carbon Catalysts, Solid Metal Organic Framework Catalysts, and Solid Metal/Nitrogen-Doped Carbon (MNC) Catalysts for the Electrochemical CO 2 Reduction journal July 2018
Nitrogen-Coordinated Single Cobalt Atom Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells journal January 2018
In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts journal June 2019
Electrocatalytic hydrogen evolution with gallium hydride and ligand-centered reduction journal January 2019
In Situ/Operando Characterization Techniques to Probe the Electrochemical Reactions for Energy Conversion journal April 2018
Surprisingly big linker-dependence of activity and selectivity in CO 2 reduction by an iridium( i ) pincer complex journal January 2020
Ultrafast X-ray Absorption Studies of the Structural Dynamics of Molecular and Biological Systems in Solution journal May 2011
Tuning Internal Strain in Metal–Organic Frameworks via Vapor Phase Infiltration for CO 2 Reduction journal January 2020
Multiscale carbon foam confining single iron atoms for efficient electrocatalytic CO2 reduction to CO journal March 2019
Boosting Electrochemical CO 2 Reduction on Metal–Organic Frameworks via Ligand Doping journal February 2019
Molecular Nitrogen-Carbon Catalysts, Solid Metal Organic Framework Catalysts, and Solid Metal/Nitrogen-Doped Carbon (MNC) Catalysts for the Electrochemical CO 2 Reduction journal October 2018
Atomic‐ and Molecular‐Level Design of Functional Metal–Organic Frameworks (MOFs) and Derivatives for Energy and Environmental Applications journal August 2019
Layered Confinement Reaction: Atomic‐level Dispersed Iron–Nitrogen Co‐Doped Ultrathin Carbon Nanosheets for CO 2 Electroreduction journal May 2019
Emerging nanostructured carbon-based non-precious metal electrocatalysts for selective electrochemical CO 2 reduction to CO journal January 2019
Boosting oxygen evolution of single-atomic ruthenium through electronic coupling with cobalt-iron layered double hydroxides journal April 2019
Electrocatalytic reduction of carbon dioxide: opportunities with heterogeneous molecular catalysts journal January 2020
Electrochemical Reduction of CO 2 : Effect of Convective CO 2 Supply in Gas Diffusion Electrodes journal October 2019
Unexpected Effect of Intramolecular Phenolic Group on Electrocatalytic CO 2 Reduction journal March 2020
Cathodized copper porphyrin metal–organic framework nanosheets for selective formate and acetate production from CO 2 electroreduction journal January 2019

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