Large-scale implementation of carbon neutral energy sources such as solar and wind will require the development of energy storage mechanisms. The hydrogenation of CO2, a potent greenhouse gas, into formic acid or methanol could function as means to store energy in a chemical bond. Here we report hydrogenation of CO2 to formate under low pressure conditions using a Co(I) tetraphosphine complex, [Co(L3)(CH3CN)]BF4, where L3 = 1,5-diphenyl-3,7-bis(diphenylphosphino)-propyl)-1,5-diaza-3,7-diphosphacyclooctane. [Co(L3)(CH3CN)]+ (0.31 mM) catalyzes CO2 hydrogenation with an initial turnover frequency (TOF) of 150(20) h-1 at 25 °C, 1.7 atm of a 1:1 mixture of H2 and CO2, and 0.6 M tBuTMG (2-tert-Butyl-1,1,3,3-tetramethylguanidine).
This research was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences. Pacific Northwest National Laboratory is operated by Battelle for the U.S. Department of Energy.
Revised: August 22, 2019 |
Published: July 17, 2017
Citation
Burgess S.A., K. Grubel, A.M. Appel, E.S. Wiedner, and J.C. Linehan. 2017.Hydrogenation of CO2 at Room Temperature and Low Pressure with a Cobalt Tetraphosphine Catalyst.Inorganic Chemistry 56, no. 14:8580-8589.PNNL-SA-124385.doi:10.1021/acs.inorgchem.7b01391