A tungsten-mediated closed cycle of reactivity for the reduction of CO(2) to CO.
The recycling of CO(2) by reduction to CO is an important objective in the context of renewable carbon feedstock chemicals. A tungsten-mediated reduction of CO(2) to CO reported by Mayer and coworkers has been re-examined, and it is shown that a series of four well-defined stoichiometric steps can be executed which form a closed cycle and sum as CO(2) + 2H(+) + 2e(-)→ CO + H(2)O. Energetic parameters of this system are probed by cyclic voltammetry, by calculations of gas-phase reaction enthalpies for each of the four steps, and by calculation of the W[triple bond, length as m-dash]O bond dissociation energy for the tungsten species that results from oxidation addition of CO(2).
Jayarathne
Upul
U
Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, LA 70118-5698, USA.
Chandrasekaran
Perumalreddy
P
Jacobsen
Heiko
H
Mague
Joel T
JT
Donahue
James P
JP