4.8 Article

Development of Highly Stable and Mass Transfer-Enhanced Cathode Catalysts: Support-Free Electrospun Intermetallic FePt Nanotubes for Polymer Electrolyte Membrane Fuel Cells

Journal

ADVANCED ENERGY MATERIALS
Volume 5, Issue 11, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201402093

Keywords

catalyst durability; electrocatalysis; intermetallic compounds; mass transport; nanotube structures

Funding

  1. Defense Acquisition Program Administration and Agency for Defense Development [UD110090GD]
  2. National Research Foundation of Korea (NRF) - Korea government (MEST) [2012R1A2A2A01002879, 2013R1A1A207450]
  3. technology development of Marine Industrial Biomaterials - Ministry of Oceans and Fisheries, Korea
  4. Institute of Basic Science [IBS-R006-G1]
  5. Korea Institute of Marine Science & Technology Promotion (KIMST) [201000902] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  6. National Research Foundation of Korea [2013R1A1A2074550, 2015H1A2A1033914] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

Ask authors/readers for more resources

Proton exchange membrane fuel cells (PEMFCs) are an alternative clean energy source and they are attracting increased attention. However, several limitations such as degradation of the carbon support and Nafion ionomer in the cathode electrode must be overcome for practical applications of PEMFCs. Support-free 1D-ordered intermetallic nanotubes (NTs) are considered as promising candidates for highly active and durable cathode catalysts in PEMFCs. However, 1D nanotubes are difficult to produce at large scale because they have generally been synthesized using a template-based method that requires multistep synthetic routes. Herein, a simple and scalable method to produce ordered-intermetallic FePt nanotubes by electrospinning is reported. When tested as cathode catalysts, under the US Department of Energy's reference condition, the activity of face-centered-tetragonal (fct) FePt NTs surpasses that of commercial Pt/C. In an accelerated degradation test at 1.4 V for 3 h, the degradation activity rate of fct-FePt NTs is only 10%, whereas that of commercial Pt/C catalysts is 65%. For practical PEMFCs, this approach would provide simple routes to support-free intermetallic nanotube structures with superior kinetic activity and higher durability than those of commercial Pt/C catalyst.

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