Journal article
Effect of alkaline exchange polymerized ionic liquid block copolymer ionomers on the kinetics of fuel cell half reactions
Journal of electroanalytical chemistry (Lausanne, Switzerland), v 783
15 Dec 2016
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Rotating disk electrode (RDE) half-cell experiments were used to determine the impact of a hydroxide-conducting polymerized ionic liquid block copolynier (PILBCP) ionomer on the oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) activity of a commercial Pt/C catalyst at three PILBCP loadings (23, 41, and 57 wt.% total solids). Increasing loadings of PILBCP resulted in reduced surface coverage of both the hydrogen (Hupp) and hydroxide/oxide (OHad/O-ad) as evidenced by the cyclic voltammograms due to both a physical blocking of surface catalytic sites and a water/ion diffusional resistance imparted by the presence of the film. With the maximum loading of 57 wt.% PILBCP, a decrease of 88% for the kinetic current density (J(k)) and 42% for the diffusion limited current (I-d) in the ORR and a decrease of 29% for the I-d in the HOR compared to bare Pt/C nanoparticles was observed. Similar trends were observed with 60 wt% Nafion on Pt/C nanoparticles. These results indicate that while substantial, the detrimental effects of PILBCP ionomers on the half-cell reaction kinetics are no worse than those observed with the Nafion ionomer. AEMFC performance optimization for polymers with sufficient hydroxide conductivities should focus on AEM ionomer integration-strategies with the goal of optimizing the triple phase boundary and limiting the interfacial resistance between the AEM and the corresponding ionomer in the catalyst layer. (C) 2016 Elsevier B.V. All rights reserved.
Metrics
Details
- Title
- Effect of alkaline exchange polymerized ionic liquid block copolymer ionomers on the kinetics of fuel cell half reactions
- Creators
- Jacob R. Nykaza - Drexel UniversityYawei Li - Drexel UniversityYossef A. Elabd - Texas A&M UniversityJoshua Snyder - Drexel University
- Publication Details
- Journal of electroanalytical chemistry (Lausanne, Switzerland), v 783
- Publisher
- Elsevier
- Number of pages
- 6
- Grant note
- W911NF-14-0310 / U.S. Army Research Office
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000390627500025
- Scopus ID
- 2-s2.0-85002292136
- Other Identifier
- 991019168584904721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Analytical
- Electrochemistry