Durable ultra-low-platinum ionomer-free anode catalyst for hydrogen proton exchange membrane fuel cell
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422931" target="_blank" >RIV/00216208:11320/20:10422931 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vn_Vs~UppR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vn_Vs~UppR</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/er.5245" target="_blank" >10.1002/er.5245</a>
Alternative languages
Result language
angličtina
Original language name
Durable ultra-low-platinum ionomer-free anode catalyst for hydrogen proton exchange membrane fuel cell
Original language description
An ultra-low-platinum catalyst based on finely dispersed platinum (Pt) deposited on a highly porous complex microporous layer was investigated as a candidate of durable anode catalyst for hydrogen oxidation reaction (HOR) in proton exchange membrane fuel cells. Etching of teflonated and nitridized base carbon substrate in oxygen plasma and simultaneous deposition of cerium oxide were applied to increase active surface area and electrochemical activity of the platinum nanocatalyst. Ultra-low loadings of Pt (between 0.85 and 8.5 mu g cm(-2)) deposited by magnetron sputtering on this substrate were assembled with Nafion 212 membrane and commercially available Pt/C cathodes (300-400 mu g cm(-2) Pt). Such membrane electrode assembly (MEA) with extremely low Pt content at anode can deliver high output power densities, reaching 0.95 W cm(-2) or 0.65 W cm(-2) with only 1.7 mu g cm(-2) of Pt, using H-2 as fuel and pure O-2 or air as an oxidant, respectively. Although electrocatalysts with highly dispersed active metals are known to often suffer from irreversible degradation, the above MEAs proved to be very stable when the cell was subjected to a durability test under heavy duty conditions of on/off cycling. The system with lower Pt content is more prone to water flooding which can, however, be eliminated by maintaining better control over the fuel humidity. Average decay of the cell voltage less than 50 mu V h(-1) was obtained in the cycling regime, while excellent stability <10 mu V h(-1) is achievable under the static load of 0.4 A cm(-2).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Energy Research
ISSN
0363-907X
e-ISSN
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Volume of the periodical
44
Issue of the periodical within the volume
6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
4641-4651
UT code for WoS article
000523954300039
EID of the result in the Scopus database
2-s2.0-85083037746