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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10403 - Physical chemistry

Result continuities

  • Project

  • 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

  • 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