Experimental Studies on the Effects of Sheet Resistance and Wettability of Catalyst Layer on Electro-Catalytic Activities for Oxygen Evolution Reaction in Proton Exchange Membrane Electrolysis Cells

Jingke Mo, Gaoqiang Yang, Yifan Li, Zhenye Kang, Guido Bender, Bryan Pivovar, Johney Green Jr., Feng-Yuan Zhang

Research output: Contribution to journalArticlepeer-review

15 Scopus Citations

Abstract

As the most important part of electrochemical reaction in proton exchange membrane electrolysis cells (PEMECs) for water splitting, oxygen evolution reaction (OER) occurs at the anode catalyst layer (CL). The distribution of the OER site is affected by many factors, such as properties of CL, operation parameters, procedures, etc. To study the effects of properties of CLs on the distribution of OER site on the CL, and consequently affect the performance of PEMECs, CLs with different sheet resistances are tested under different operation conditions. The phenomena of OER on CLs are captured by a high-speed and micro-scale visualization system in-situ and analysed coupled with electrochemical results. The results show that both sheet resistance and wettability of CLs have significant impact on the distribution of the OER site, which can help optimize the design of membrane electrode assembly and improve the operating parameters for electrochemical devices.

Original languageAmerican English
Pages (from-to)26595-26603
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number51
DOIs
StatePublished - 16 Oct 2020

Bibliographical note

Publisher Copyright:
© 2020 Hydrogen Energy Publications LLC

NREL Publication Number

  • NREL/JA-5900-77542

Keywords

  • Oxygen evolution reaction
  • Proton exchange membrane electrolysis cell
  • Sheet resistance
  • Visualization
  • Wettability

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