Selective Reduction of CO₂ to a Formate Equivalent with Heterobimetallic Gold‐ ‐ ‐Copper Hydride Complexes

Abstract

As eries of heterobimetallic complexes containing three-center,two-electron Au À H À Cu bonds have been prepared from addition of ap arent gold hydride to ab ent d 10 copper(I) fragment. These highly unusual heterobimetallic complexes represent am issing link in the widely investigated series of neutral and cationic coinage metal hydride complexes containing Cu À H À Cu and M À H À M + moieties (M = Cu, Ag). The well-defined heterobimetallic hydride complexes act as precatalysts for the conversion of CO 2 into HCO 2 Bpin with HBpin as the reductant. The selectivity of the heterobimetallic complexes for the catalytic production of aformate equivalent surpasses that of the parent monomeric Group 11 complexes.

Synthesis of Homo‐ and Heteroleptic Al, Ga and Zn Complexes Containing (Per)fluorinated β‐Diketiminate Ligands

“…[ 7 ] Moreover, the introduction of strongly electron withdrawing substituents such as CF 3 groups to the ligand backbone ( II ) and of perfluorinated aryl substituents at the imine center ( III ), was also reported. [ 8–11 ] The introduction of CF 3 groups to the ligand backbone resulted in significantly reduced electron donating properties compared to the alkyl‐ and aryl‐substituted derivatives as was demonstrated by cyclic voltammetry using Ir III complexes [ 8,12 ] and by IR spectroscopic studies using Cu I carbonyl complexes. [ 13,14 ] The resulting transition metal complexes showed promising catalytic applications in Lewis‐acidic catalysis, i.e.…”

Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction

“…S ubstitutions of traditional, fossil fuel based energies with renewable energy sources such as wind, solar, and hydraulic sources have become feasible as clean energy is getting more affordable. 1,2 Electrochemical CO 2 reduction (ECR) over metal and alloy catalysts, such as Cu, Ag, Au, etc., 3,4 is a promising technology to address long-term, seasonal grid energy storage which remains one of the key challenges for wide-scale deployment of renewable energies. It also provides a feasible path forward to go beyond carbon neutrality by using CO 2 as a plentiful and cheap resource for the synthesis of important feedstock chemicals for durable polymer products that provide permanent CO 2 storage.…”