Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 145, Issue 12, Pages 6762-6772Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.2c12251
Keywords
-
Categories
Ask authors/readers for more resources
The modification of a Cr-Ga oxide electrocatalyst through the introduction of nickel generates a high faradaic efficiency in producing 1-butanol. At certain potentials, 3-hydroxybutanal becomes the primary product. Mechanistic studies show that formate is the initial CO2 reduction product and acetaldehyde is the key intermediate.
Electrochemical transformation of CO2 into energy dense liquid fuels provides a viable solution to challenges regarding climate change and nonrenewable resource dependence. Here, we report on the modification of a Cr-Ga oxide electrocatalyst through the introduction of nickel to generate a catalyst that generates 1butanol at unprecedented faradaic efficiencies (xi = 42%). This faradaic efficiency occurs at -1.48 V vs Ag/AgCl, with 1-butanol production commencing at an overpotential of 320 mV. At this potential, minor products include formate, methanol, acetic acid, acetone, and 3-hydroxybutanal. At -1.0 and -1.4 V, 3hydroxybutanal becomes the primary product. This is in contrast to the nickel-free (Cr2O3)3(Ga2O3) system, where neither 3hydroxybutanal nor 1-butanol was detected. Mechanistic studies show that formate is the initial CO2 reduction product and identify acetaldehyde as the key intermediate. Nickel is found responsible for the coupling and reduction of acetaldehyde to generate the higher molecular weight carbon products observed. To the best of our knowledge, this is the first electrocatalyst to generate 1-butanol with high faradaic efficiency.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available