Abstract
Hydrogen technology offers a clean energy solution for industries and transportation, with PEM water electrolyzers playing a pivotal role in its production. These electrolyzers are efficient and can utilize renewable energy sources, producing hydrogen without carbon emissions. However, challenges such as high capital costs, limited durability, and supply chain constraints need to be addressed for widespread adoption. Efforts to reduce costs include reducing platinum group metal catalyst loadings, specifically iridium (Ir) in the anode and/or as the protective coating on porous transport layer (PTL). Changes in ink composition for fabricating catalyst layers can pose integration challenges related to compatibility, electrochemical performance, and manufacturability. Sputter-depositing these catalyst layers is a promising alternative fabrication method that can streamline production. It offers precise control over thickness, uniformity, and composition, as well as potentially eliminating the need for ionomer in the catalyst layer. In this presentation, we will report on the effects of sputter-deposited anode catalyst layers on two different commercially available PTL and microporous transport layer (MPL). The effects of loadings on performance will be discussed. Preliminary results show that performance decreases as loading decreases with the extent of performance loss depending on the choice of MPL or PTL. Figure 1
Published Version
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