COElectroreduction to Methane at Production Rates Exceeding 100 mA/cm2

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Armin Sedighian Rasouli
  • Joshua Wicks
  • Geonhui Lee
  • Tao Peng
  • Fengwang Li
  • Christopher McCallum
  • Cao-Thang Dinh
  • Alexander H. Ip
  • David Sinton
  • Edward H. Sargent

Detail(s)

Original languageEnglish
Pages (from-to)14668-14673
Journal / PublicationACS Sustainable Chemistry and Engineering
Volume8
Issue number39
Online published14 Sept 2020
Publication statusPublished - 5 Oct 2020
Externally publishedYes

Abstract

The electrochemical reduction of CO2 to methane is a promising method to store intermittent renewable energy. Previous research reporting high methane selectivity has relied on H-cells, and total current densities have therefore resided below 50 mA/cm2, insufficient for industrial applications. Here, we increase the methane production rate by modifying the system so that it functions efficiently in a flow cell configuration. We investigate the impact of the local environment on methane selectivity in flow cells by tuning the choice of electrolyte cation, catalyst thickness, and local pH. We achieve a methane selectivity of 48% ± 4% with a partial current density of 120 ± 10 mA/cm2, representing a cathodic energy efficiency of 23%. We showcase a stable operation for 14 h.

Research Area(s)

  • Catalyst thickness, CO2 reduction reaction, Electrolyte cation, Flow cell, Local environment, Local pH, Methane

Citation Format(s)

COElectroreduction to Methane at Production Rates Exceeding 100 mA/cm2. / Sedighian Rasouli, Armin; Wang, Xue; Wicks, Joshua et al.
In: ACS Sustainable Chemistry and Engineering, Vol. 8, No. 39, 05.10.2020, p. 14668-14673.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review