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SUMMARY:Noble Metal Aerogels as Highly Durable Catalysts for Polymer Elect
 rolyte Fuel Cell Applications
DTSTART:20180315T140000
DTEND:20180315T150000
DTSTAMP:20260919T081942Z
UID:f20fe0df7a7f47d29953d2069faa153081fb46a8c61cad9ded997b46
CATEGORIES:Conferences - Seminars
DESCRIPTION:Thomas J. Schmidt\nElectrochemistry Laboratory\, Energy & Envi
 ronment Division\nPaul Scherrer Institute\, Villigen\, Switzerland\nand La
 boratory of Physical Chemistry\, ETH Zürich\, Zürich\, Switzerland\nChE-
 605 - Highlights in Energy Research seminar series\nState-of-the-art polym
 er electrolyte fuel cells (PEFCs) require large amounts of carbon-supporte
 d platinum nanoparticle (Pt/C) catalysts (~ 0.4 mgPt/cm2geometric) to acco
 unt for the large overpotential of the oxygen reduction reaction (ORR). [1
 ] These excessive Pt-loadings that impede widespread commercialization of 
 PEFCs can be mitigated by increasing the catalysts’ ORR activity\, e.g. 
 by alloying platinum with other metals like Ni\, Cu and Co\, to form mater
 ials which show up to one order of magnitude higher mass-specific activity
  than commercial Pt/C catalysts. On the other hand\, state-of-the art carb
 on-supported materials suffer from significant carbon and Pt corrosion dur
 ing the normal operation of PEFCs\, gradually compromising their performan
 ce. To partially overcome these stability issues\, a lot of research effor
 t is dedicated to the development of unsupported ORR catalysts. Among thes
 e materials\, bimetallic alloy aerogels consisting of nanoparticles interc
 onnected to nanochains [2] present an interesting option\, since their ext
 ended 3D structure should facilitate transfer to actual PEFC cathodes.\n\n
 In this talk\, after having elucidated the high electrocatalytic activity 
 of noble metal aerogels towards the ORR in model studies [3]\, the success
 ful transfer of these catalysts into technical PEFC cathode environment wi
 ll be presented demonstrating the practical applicability of these systems
 .\nReferences:\n[1] A. Rabis\, P. Rodriguez\, T.J. Schmidt\, ACS Catalysis
  2 (2013) 768-800.\n[2] W. Liu\, et al.\, Acc. Chem. Res. 48 (2015) 154-16
 2\n[3] S. Henning\, et al.\, J. Electrochem. Soc. 163 (2016) F1-F6\n\nThe 
 seminar can also be followed remotely by joining  the online Cisco WebEx m
 eeting  (connection possible 15 minutes before the talk).\nSee here the do
 cumentation how to install the Cisco WebEx add-on on your computer.\nIn ca
 se of problem\, you can contact our IT support (37679 - it.vs@epfl.ch ) \n
 \n 
LOCATION:I17 4 K2 https://plan.epfl.ch/?room==I17%204%20K2
STATUS:CONFIRMED
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