Self-supported Pt-CoO networks combining high specific activity with high surface area for oxygen reduction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73604405" target="_blank" >RIV/61989592:15310/21:73604405 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41563-020-0775-8" target="_blank" >https://www.nature.com/articles/s41563-020-0775-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41563-020-0775-8" target="_blank" >10.1038/s41563-020-0775-8</a>
Alternative languages
Result language
angličtina
Original language name
Self-supported Pt-CoO networks combining high specific activity with high surface area for oxygen reduction
Original language description
A high oxygen reduction reaction activity can usually be realized by increasing platinum specific activity at the expense of active surface area. Self-supported platinum-cobalt-oxide networks combining high activity and surface area now promise a stable fuel-cell operation. Several concepts for platinum-based catalysts for the oxygen reduction reaction (ORR) are presented that exceed the US Department of Energy targets for Pt-related ORR mass activity. Most concepts achieve their high ORR activity by increasing the Pt specific activity at the expense of a lower electrochemically active surface area (ECSA). In the potential region controlled by kinetics, such a lower ECSA is counterbalanced by the high specific activity. At higher overpotentials, however, which are often applied in real systems, a low ECSA leads to limitations in the reaction rate not by kinetics, but by mass transport. Here we report on self-supported platinum-cobalt oxide networks that combine a high specific activity with a high ECSA. The high ECSA is achieved by a platinum-cobalt oxide bone nanostructure that exhibits unprecedentedly high mass activity for self-supported ORR catalysts. This concept promises a stable fuel-cell operation at high temperature, high current density and low humidification.
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
10403 - Physical chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
NATURE MATERIALS
ISSN
1476-1122
e-ISSN
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Volume of the periodical
20
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
208-213
UT code for WoS article
000562717600005
EID of the result in the Scopus database
2-s2.0-85089726908