Journal article
Ionic Liquid Additives for the Mitigation of Nafion Specific Adsorption on Platinum
ACS catalysis, v 10(14), pp 7691-7698
17 Jul 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Perfluorosulfonic acid (PFSA)-based ionomers, most notably Nafion, provide the ionic connection between catalyst particles and solid polymer ion conducting membrane separators in polymer electrolyte membrane fuel cells (PEMFCs). While necessary, their presence adversely impacts the performance of the catalyst. PEMFC catalyst performance losses associated with Nafion ionomers are due to physical barriers to reactant gas transport and loss of active sites through specific adsorption of polymer-bound sulfonate groups on the catalyst surface. These impacts are particularly damaging for PEMFC high current density (HCD) performance. Here, we show that ionic liquids (IL) present at the catalyst interface can act to prevent the specific adsorption of sulfonate groups of Nafion on Pt surfaces, negating the detrimental impact of the ionomer on reaction rates, specifically for the oxygen reduction reaction (ORR). This result holds promise for further Pt loading reductions in PEMFCs.
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Details
- Title
- Ionic Liquid Additives for the Mitigation of Nafion Specific Adsorption on Platinum
- Creators
- Yawei Li - Drexel UniversitySaad Intikhab - Drexel UniversityArnav Malkani - University of DelawareBingjun Xu - University of DelawareJoshua Snyder - Drexel UniversityGeneral Motors LLC, Detroit, MI (United States)
- Publication Details
- ACS catalysis, v 10(14), pp 7691-7698
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 8
- Grant note
- DE-EE0007271; DE-EE0008434 / Department of Energy, Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office; United States Department of Energy (DOE) CBET-1651625 / National Science Foundation CAREER Program; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000551549800020
- Scopus ID
- 2-s2.0-85089543892
- Other Identifier
- 991019168725704721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical