A new polypyridyl‐based Ru (II) complex as a highly efficient electrocatalyst for CO2 reduction. (5th January 2020)

• Record Type: Journal Article
• Authors: Daryanavard, Marzieh; Masoumpour, Marziyeh Sadat
• Is Part Of: Applied organometallic chemistry. Volume 34:Number 3(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-01-05
• Subjects: carbon dioxide -- CO2 reduction -- electrocatalyst -- ruthenium complex -- theoretical calculations; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.5389
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract : A new polypyridyl Ru (II) complex, cis ‐[Ru (Me4 phen)2 (CH3 CN)2 ](NO3 )2 (Me4 phen = 3, 4, 7, 8‐tetramethyl‐1, 10‐phenanthroline) has been prepared and fully characterized by elemental analysis, X‐ray crystallography, cyclic voltammetry and spectroscopic techniques. The solid‐state structure of the complex indicated that the Ru (II) center is sitting in an N4 N′2 coordination environment with a distorted octahedral geometry. Cyclic voltammetry technique was used to investigate the catalytic activity of the Ru (II) complex on the electrocatalytic reduction of CO2 to CO in acetonitrile. The effect of the different reaction parameters, including the scan rate, concentration of the electrocatalyst [complex Ru (II)] and reaction temperature, on the catalytic activity was also investigated. The results showed that the electrocatalytic activity of the complex increases with increasing electrocatalyst concentration and scan rate. Further, the CO2 reduction peak current decreases at lower temperatures owing to the inverse relationship between the temperature and activation energy. The theoretical calculations confirmed the proposed electrocatalytic mechanism comprising seven steps. Abstract : A new Ru (II) complex exhibits an outstanding electrocatalytic activity towards CO2 electroreduction to CO, which can be converted into other value‐added chemicals and fuels via the Fischer–Tropsch process providing a green approach for recycling carbon and moderating global warming.