Sequential Capacitive Deposition of Ionic Liquids for Conformal Thin Film Coatings on Oxygen Reduction Reaction Electrocatalysts

Ionic liquid (IL)-modified carbon-supported catalysts have demonstrated significant improvements in oxygen reduction reaction (ORR) activity. However, transition of this result from the half-cell to the proton exchange membrane fuel cell (PEMFC) has been challenging. Presented here is a processing m...

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Published inACS catalysis Vol. 9; no. 10; pp. 9311 - 9316
Main Authors Li, Yawei, Hart, James, Profitt, Lauren, Intikhab, Saad, Chatterjee, Swarnendu, Taheri, Mitra, Snyder, Joshua
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 04.10.2019
American Chemical Society (ACS)
Subjects
Chemistry
fuel cells
ionic liquids
oxygen reduction reaction
electrocatalysis
durability
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Summary:Ionic liquid (IL)-modified carbon-supported catalysts have demonstrated significant improvements in oxygen reduction reaction (ORR) activity. However, transition of this result from the half-cell to the proton exchange membrane fuel cell (PEMFC) has been challenging. Presented here is a processing methodology that yields the formation of a thin (<2 nm) conformal IL coating on the surface of both three-dimensional electrocatalysts and bulk single crystals through the sequential capacitive deposition (SCD) of anionic and cationic components and their subsequent condensation into a hydrophobic, protic IL. SCD shows promise for IL incorporation into preformed PEMFC catalyst layers.
Bibliography:EE0007271
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.9b03157