title: Enhanced electrocatalytic reduction of CO2 with ternary Ni-Fe4S4 and Co-Fe4S4-based biomimetic chalcogels.
abstract: Enzymes that catalytically transform small molecules such as CO, formate, or protons are naturally composed of transition metal cluster units bound into a larger superstructure. Artificial biomimetic catalysts are often modeled after the active sites but are typically molecular in nature. We present here a series of fully integrated porous materials containing Fe(4)S(4) clusters, dubbed "biomimetic chalcogels". We examine the effect of third metal cations on the electrochemical and electrocatalytic properties of the chalcogels. We find that ternary biomimetic chalcogels containing Ni or Co show increased effectiveness in transformations of carbon dioxide and can be thought of as solid-state analogues of NiFe or NiFeS reaction centers in enzymes.
authors.affiliation: Department of Chemistry and Argonne-Northwestern Solar Energy Research Center, Northwestern University, Evanston, Illinois 60208-3113, United States.
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Yuhas
authors.forename: Chaiya
authors.initials: C
authors.lastname: Prasittichai
authors.forename: Joseph T
authors.initials: JT
authors.lastname: Hupp
authors.forename: Mercouri G
authors.initials: MG
authors.lastname: Kanatzidis
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D020134:Catalytic Domain; D003035:Cobalt / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D007506:Iron-Sulfur Proteins / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D016062:Porosity; D013455:Sulfur / Q000737:chemistry
chemical_list: D007506:Iron-Sulfur Proteins; D002245:Carbon Dioxide; D003035:Cobalt; D013455:Sulfur; D009532:Nickel; D007501:Iron