Effects of composition of the micro porous layer and the substrate on performance in the electrochemical reduction of CO2 to CO

Byoungsu Kim, Febrian Hillman, Miho Ariyoshi, Shigenori Fujikawa, Paul J.A. Kenis

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

With the development of better catalysts, mass transport limitations are becoming a challenge to high throughput electrochemical reduction of CO2 to CO. In contrast to optimization of electrodes for fuel cells, optimization of gas diffusion electrodes (GDE)-consisting of a carbon fiber substrate (CFS), a micro porous layer (MPL), and a catalyst layer (CL)-for CO2 reduction has not received a lot of attention. Here, we studied the effect of the MPL and CFS composition on cathode performance in electroreduction of CO2 to CO. In a flow reactor, optimized GDEs exhibited a higher partial current density for CO production than Sigracet 35BC, a commercially available GDE. By performing electrochemical impedance spectroscopy in a CO2 flow reactor we determined that a loading of 20 wt% PTFE in the MPL resulted in the best performance. We also investigated the influence of the thickness and wet proof level of CFS with two different feeds, 100% CO2 and the mixture of 50% CO2 and N2, determining that thinner and lower wet proofing of the CFS yields better cathode performance than when using a thicker and higher wet proof level of CFS.

Original languageEnglish
Pages (from-to)192-198
Number of pages7
JournalJournal of Power Sources
Volume312
DOIs
Publication statusPublished - Apr 30 2016

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Carbon Monoxide
carbon fibers
Carbon fibers
diffusion electrodes
Substrates
Chemical analysis
gaseous diffusion
Diffusion in gases
Electrodes
Cathodes
cathodes
reactors
catalysts
Catalysts
optimization
Polytetrafluoroethylene
Electrochemical impedance spectroscopy
Polytetrafluoroethylenes
fuel cells
Fuel cells

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Effects of composition of the micro porous layer and the substrate on performance in the electrochemical reduction of CO2 to CO. / Kim, Byoungsu; Hillman, Febrian; Ariyoshi, Miho; Fujikawa, Shigenori; Kenis, Paul J.A.

In: Journal of Power Sources, Vol. 312, 30.04.2016, p. 192-198.

Research output: Contribution to journalArticle

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