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Integrated High-Efficiency Pt/Carbon Nanotube Arrays for PEM Fuel Cells
journal contribution
posted on 2011-01-01, 00:00 authored by W Zhang, A Minett, M Gao, J Zhao, Joselito RazalJoselito Razal, G Wallace, T Romeo, J ChenA facile strategy to deposit Pt nanoparticles with various metal-loading densities on vertically aligned carbon nanotube (ACNT) arrays as electrocatalysts for proton exchange membrane (PEM) fuel cells is described. The deposition is achieved by electrostatic adsorption of the Pt precursor on the positively charged polyelectrolyte functionalized ACNT arrays and subsequent reduction by L-ascorbic acid. The application of the aligned electrocatalysts in fuel cells is realized by transferring from a quartz substrate to nafion membrane using a hot-press procedure to fabricate the membrane electrode assembly (MEA). It is shown that the MEA with vertically aligned structured electrocatalysts provides better Pt utilization than that with Pt on conventional carbon nanotubes or carbon black, resulting in higher fuel cell performance.
History
Journal
Advanced Energy MaterialsVolume
1Issue
4Pagination
671 - 677Publisher
Wiley-VCH VerlagLocation
Weinheim, GermanyPublisher DOI
ISSN
1614-6832eISSN
1614-6840Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2011, WILEY-VCH VerlagUsage metrics
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