Abstract
Palladium(II) complexes namely [Pd(LMe)2(Cl)2] (5), [Pd(LEt)2(Cl)2] (6), [Pd(LBu)(Cl)2] (7) and [Pd(LBz)(Cl)2] (8) were synthesized as electrocatalysts towards CO2 reduction into CO, H2O acting as proton source in presence of TFA. These catalysts were prepared by substitution of benzonitrile from bis(benzonitrile)palladium(II)chloride with proligands; [HLMe][OTf] (1), [HLEt][I] (2), [HLBu][Br] (3) and [HLBz][Cl] (4) correspondingly. All the eight new compounds were successfully characterized with spectroscopic and single crystal X-ray diffraction techniques. It was found out that both steric and electronic properties of ligands concomitantly affected the catalytic properties of the catalysts. The activity of these catalysts decreases in the following order: 6 >7 >5 >8. 6 displayed maximum TOF of 337 s−1 and rate constant (kcat) of 1870 M−1s−1 along with 73 % Faradaic efficiency to produce CO from CO2 in the presence of trifluoracetic acid. However, the lowest over potential (η) of −340 mV was shown by 7. All the catalysts were robust with no major current fluctuations were observed during controlled potential electrolysis for more than 3600 s.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.