Oxo-functionalised mesoionic NHC nickel complexes for selective electrocatalytic reduction of CO₂ to formate

Abstract

Strategies for the conversion of CO2 to valuable products are paramount for reducing the environmental risks associated with high levels of this greenhouse gas and offer unique opportunities for transforming...

Challenges and recent advancements in the transformation of CO2into carboxylic acids: straightforward assembly with homogeneous 3d metals

“…Another Ni-complex ( 462 ) containing a tailored C,O-bidentate chelating mesoionic carbene ligand was developed by the Albrecht group in 2019. 376 Excitingly, this new type of complex exhibited a very high faradaic efficiency (83% FE) for the formate generation from CO 2 exclusively. After a mechanistic study, the authors proposed the involvement of two different kinds of Ni–H intermediates during the reaction.…”

Recent Progress on N‐heterocyclic Carbene Catalysts in Chemical Fixation of CO2

“…Simone Bertini et al developed a series of NHC-nickel catalysts in 2021 to regulate the electrochemical conversion of carbon dioxide to formic acid. During the reaction, [54] it can be obviously monitored that the cathode current increases and carbon dioxide is reduced at the cathode. It is found by calculation that the Faraday efficiency of this reaction has reached an unprecedented 83% with this kind of carbene nickel catalyst, which is due to the high electrocatalytic activity and low reduction potential of the complex.…”

Manganese(iii) complexes stabilized with N-heterocyclic carbene ligands for alcohol oxidation catalysis

“…Here we have expanded the range of high-valent manganese NHC systems by leveraging on the combination of hard phenolates as support for strongly σ-donating carbenes in first-row transition metal complexes. [33][34][35] Specifically, we have prepared Arduengo-type NHC and sterically related mesoionic 1,2,3-triazolylidene complexes with a manganese(III) center and explored their catalytic activity in alcohol oxidation using tBuOOH as sacrificial oxidant. This methodology therefore provides an approach for employing Earth-abundant metals in combination with an inexpensive oxidant 36,37 for this industrially relevant reaction.…”