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Abstract
The general requirements for fuel cell catalyst support
materials are high electronic conductivity; high specific
surface area and high electrochemical and chemical
stability. Material structure should also enable good gas
and water vapor transport in it. Currently typical
structures for PEM fuel cell catalysts consists Pt
nano-particles on carbon black support. We as suggesting
a new concept where supports consist of (nano)fibrous
carbon and ceramic (nano)tubular structures providing
high surface area for catalyst reaction and high porosity
for good management the product water. Materials are
corrosion resistant and electrically conductive.
Fibrous and tubular material structures are based on
electrospinning - method leading to submicron or
nanoscale fibre diameters. Our approach to produce
core-shell carbon-ceramic catalyst supports includes
preparation of electrospun precursor fibres,
stabilization and carbonization of precursor fibres into
carbon, and atomic layer deposition (ALD) coating method
to produce conducting niobium doped titanium oxide layer
onto carbon fibres. Our approach to produce tubular
catalyst supports includes preparation of sacrificial
electrospun template fibres, preparation of oxide layer
on fibres by ALD and removal of polymer template from the
structure by heat treatment. Oxide coating and tube
structures produced by ALD are annealed to form
conductive surface suitable for Pt deposition by ALD.
Heat treatment processes of web samples were carried out
using tubular furnace suitable for roll-to-roll
operation.
In this presentation we will report production of such
fibrous and tubular materials, optimization work done for
improving support quality, and Pt coating of such
structures, as well as discuss of use of these mateials
in catalyst applications. Work carried out within
Catapult project; novel CATAlyst structures employing Pt
at Ultra Low and zero loadings for auTomotive MEAs;
Supported by EU FCH-JU; Grant agreement no 325268.
Original language | English |
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Publication status | Published - 2015 |
Event | 5th European PEFC & H2 Forum European, EFCF 2015, 30 June - 3 July 2015, Lucerne, Switzerland - Duration: 1 Jan 2015 → … |
Conference
Conference | 5th European PEFC & H2 Forum European, EFCF 2015, 30 June - 3 July 2015, Lucerne, Switzerland |
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Period | 1/01/15 → … |
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Dive into the research topics of 'Fibrous and tubular structures for PEMFC catalyst supports combining electrospinning, heat treatments and atomic layer deposition (ALD)'. Together they form a unique fingerprint.Projects
- 1 Finished
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CATAPULT: novel CATAlyst structures employing Pt at Ultra Low and zero loadings for auTomotive MEAs
1/06/13 → 31/05/16
Project: EU project