Experimental assessment and analysis of mass transport limiting current density in water vapor-fed polymer electrolyte membrane electrolyzers.

ABSTRACT: Polymer electrolyte membrane water electrolyzers (PEMWEs) are a critical technology for efficient hydrogen production to decarbonize fuels and industrial feedstocks. To make hydrogen cost-effective, the overpotentials across the cell need to be decreased and platinum-group metal loading reduced. One overpotential that needs to be better understood is due to mass transport limitations from bubble formation within the porous transport layer (PTL) and anode catalyst layer (ACL), which can lead to a reduction in performance at typical operating current densities. When operating at ultra-high current densities (UHCD), the rate of the OER may reach a critical point at which oxygen gas bubbles fill the pores of the ACL and PTL, completely blocking access of liquid water to the ACL. Because of thi

SUBMITTER: Ebbert MA 

PROVIDER: S-EPMC11685633 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature