Nickel-Gallium-Catalyzed Electrochemical Reduction of CO2 to Highly Reduced Products at Low Overpotentials

Daniel A. Torelli, Sonja A. Francis, J. Chance Crompton, Alnald Javier, Jonathan R. Thompson, Bruce S. Brunschwig, Manuel P. Soriaga, Nathan S Lewis

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

We report the electrocatalytic reduction of CO2 to the highly reduced C2 products, ethylene and ethane, as well as to the fully reduced C1 product, methane, on three different phases of nickel-gallium (NiGa, Ni3Ga, and Ni5Ga3) films prepared by drop-casting. In aqueous bicarbonate electrolytes at neutral pH, the onset potential for methane, ethylene, and ethane production on all three phases was found to be -0.48 V versus the reversible hydrogen electrode (RHE), among the lowest onset potentials reported to date for the production of C2 products from CO2. Similar product distributions and onset potentials were observed for all three nickel-gallium stoichiometries tested. The onset potential for the reduction of CO2 to C2 products at low current densities catalyzed by nickel-gallium was >250 mV more positive than that of polycrystalline copper, and approximately equal to that of single crystals of copper, which have some of the lowest overpotentials to date for the reduction of CO2 to C2 products and methane. The nickel-gallium films also reduced CO to ethylene, ethane, and methane, consistent with a CO2 reduction mechanism that first involves the reduction of CO2 to CO. Isotopic labeling experiments with 13CO2 confirmed that the detected products were produced exclusively by the reduction of CO2.

Original languageEnglish
Pages (from-to)2100-2104
Number of pages5
JournalACS Catalysis
Volume6
Issue number3
DOIs
Publication statusPublished - Mar 4 2016

Fingerprint

Gallium
Nickel
Methane
Ethane
Ethylene
Carbon Monoxide
Copper
Bicarbonates
Stoichiometry
Labeling
Electrolytes
Hydrogen
Casting
Current density
Single crystals
Electrodes
ethylene
Experiments

Keywords

  • C2 production
  • CO reduction
  • electrocatalysis
  • ethane
  • low overpotential
  • methane
  • nickel gallium
  • NiGa

ASJC Scopus subject areas

  • Catalysis

Cite this

Torelli, D. A., Francis, S. A., Crompton, J. C., Javier, A., Thompson, J. R., Brunschwig, B. S., ... Lewis, N. S. (2016). Nickel-Gallium-Catalyzed Electrochemical Reduction of CO2 to Highly Reduced Products at Low Overpotentials. ACS Catalysis, 6(3), 2100-2104. https://doi.org/10.1021/acscatal.5b02888

Nickel-Gallium-Catalyzed Electrochemical Reduction of CO2 to Highly Reduced Products at Low Overpotentials. / Torelli, Daniel A.; Francis, Sonja A.; Crompton, J. Chance; Javier, Alnald; Thompson, Jonathan R.; Brunschwig, Bruce S.; Soriaga, Manuel P.; Lewis, Nathan S.

In: ACS Catalysis, Vol. 6, No. 3, 04.03.2016, p. 2100-2104.

Research output: Contribution to journalArticle

Torelli, DA, Francis, SA, Crompton, JC, Javier, A, Thompson, JR, Brunschwig, BS, Soriaga, MP & Lewis, NS 2016, 'Nickel-Gallium-Catalyzed Electrochemical Reduction of CO2 to Highly Reduced Products at Low Overpotentials', ACS Catalysis, vol. 6, no. 3, pp. 2100-2104. https://doi.org/10.1021/acscatal.5b02888
Torelli DA, Francis SA, Crompton JC, Javier A, Thompson JR, Brunschwig BS et al. Nickel-Gallium-Catalyzed Electrochemical Reduction of CO2 to Highly Reduced Products at Low Overpotentials. ACS Catalysis. 2016 Mar 4;6(3):2100-2104. https://doi.org/10.1021/acscatal.5b02888
Torelli, Daniel A. ; Francis, Sonja A. ; Crompton, J. Chance ; Javier, Alnald ; Thompson, Jonathan R. ; Brunschwig, Bruce S. ; Soriaga, Manuel P. ; Lewis, Nathan S. / Nickel-Gallium-Catalyzed Electrochemical Reduction of CO2 to Highly Reduced Products at Low Overpotentials. In: ACS Catalysis. 2016 ; Vol. 6, No. 3. pp. 2100-2104.
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