Gaining the Freedom of Scalable Gas Diffusion Electrodes for the CO2 Reduction Reaction

Xin Wang, Chanikarn Tomon, Tim Bobrowski, Patrick Wilde, João R.C. Junqueira, Thomas Quast, Wenhui He, Nivedita Sikdar, Jonas Weidner, Wolfgang Schuhmann

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Gas diffusion electrodes (GDEs) in CO2 reduction reaction (CO2RR) alleviate the mass transfer limitation of gaseous reagents, which is beneficial for reducing CO2 into valuable chemicals. GDEs offer higher current densities compared to electrodes immersed in the electrolyte. Disclosing the roles of different structural parameters in tuning the performance of the GDEs is essential to exert the potential of catalysts and to meet potential large-scale industrial applications of the CO2RR. A novel layer structure for the airbrush-type spray fabrication of GDEs was designed and optimised, comprising a carbon-based gas-diffusion layer, a PEEK fabric, a Ni mesh, a carbon-integrated catalyst layer, and a PTFE top layer. It was shown that adjusting the carbon material in the gas diffusion and the catalyst layer impacts the selectivity of the CO2RR due to the modulation of the pore network. This work disclosed a practical and scalable but also an easily transferable pathway for preparing GDEs and offered an idea of how to tune the significant parameters of GDEs for optimising their CO2RR performance.

Original languageEnglish
Article numbere202200675
JournalChemElectroChem
Volume9
Issue number21
DOIs
StatePublished - 15 Nov 2022
Externally publishedYes

Keywords

  • CO reduction reaction
  • GDE design
  • electrocatalysis
  • gas diffusion electrode
  • three-phase boundary

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

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