Journal article
Self-supported Pt-CoO networks combining high specific activity with high surface area for oxygen reduction
University of Copenhagen1
Palacký University Olomouc2
University of Bern3
University of Oldenburg4
Department of Physics, Technical University of Denmark5
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark6
National Centre for Nano Fabrication and Characterization, Technical University of Denmark7
Nanocharacterization, National Centre for Nano Fabrication and Characterization, Technical University of Denmark8
Electron matter interaction, Nanocharacterization, National Centre for Nano Fabrication and Characterization, Technical University of Denmark9
Leibniz Institute for Plasma Science and Technology10
...and 0 moreSeveral 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.
Language: | English |
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Publisher: | Nature Publishing Group UK |
Year: | 2021 |
Pages: | 208-213 |
ISSN: | 14764660 and 14761122 |
Types: | Journal article |
DOI: | 10.1038/s41563-020-0775-8 |
ORCIDs: | 0000-0001-9103-8343 , 0000-0002-6639-8539 , 0000-0002-9374-9330 , 0000-0001-8545-7576 , 0000-0002-8689-9517 , 0000-0001-6265-0314 , Smitshuysen, Thomas Erik Lyck , Kadkhodazadeh, Shima , 0000-0003-0291-217X , 0000-0002-0652-5057 , 0000-0002-6432-3015 , 0000-0001-7749-6567 , 0000-0003-0814-4319 and 0000-0001-9765-4315 |