Journal article
Oxygen Reduction Reaction Performance of [MTBD][beti]-Encapsulated Nanoporous NiPt Alloy Nanoparticles
Advanced functional materials, v 23(44), pp 5494-5501
26 Nov 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Recent advances in oxygen reduction reaction catalysis for proton exchange membrane fuel cells (PEMFCs) include i) the use of electrochemical dealloying to produce high surface area and sometimes nanoporous catalysts with a Pt-enriched outer surface, and ii) the observation that oxygen reduction in nanoporous materials can be potentially enhanced by confinement effects, particularly if the chemical environment within the pores can bias the reaction toward completion. Here, these advances are combined by incorporating a hydrophobic, protic ionic liquid, [MTBD][beti], into the pores of high surface-area NiPt alloy nanoporous nanoparticles (np-NiPt/C + [MTBD][beti]). The high O-2 solubility of the [MTBD][beti], in conjunction with the confined environment within the pores, biases reactant O-2 toward the catalytic surface, consistent with an increased residence time and enhanced attempt frequencies, resulting in improved reaction kinetics. Half-cell measurements show the np-NiPt/C+[MTBD][beti] encapsulated catalyst to be nearly an order of magnitude more active than commercial Pt/C, a result that is directly translated into operational PEMFCs.
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Details
- Title
- Oxygen Reduction Reaction Performance of [MTBD][beti]-Encapsulated Nanoporous NiPt Alloy Nanoparticles
- Creators
- Joshua Snyder - Johns Hopkins UniversityKenneth Livi - Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USAJonah Erlebacher - Department of Materials Science and Engineering & Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Publication Details
- Advanced functional materials, v 23(44), pp 5494-5501
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- DE-SC0008686 / U.S. Department of Energy, Basic Energy Sciences; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000327470000007
- Scopus ID
- 2-s2.0-84888636377
- Other Identifier
- 991019296579204721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter