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Electrodeposition of palladium-dotted nickel nanowire networks as a robust self-supported methanol electrooxidation catalyst

Title data

Böttcher, Tim ; Stojkovikj, Sasho ; Khadke, Prashant ; Kunz, Ulrike ; Mayer, Matthew T. ; Roth, Christina ; Ensinger, Wolfang ; Muench, Falk:
Electrodeposition of palladium-dotted nickel nanowire networks as a robust self-supported methanol electrooxidation catalyst.
In: Journal of Materials Science. Vol. 56 (2021) . - pp. 12620-12633.
ISSN 1573-4803
DOI: https://doi.org/10.1007/s10853-021-06088-6

Abstract in another language

Mass activity and long-term stability are two major issues in current fuel cell catalyst designs. While supported catalysts normally suffer from poor long-term stability but show high mass activity, unsupported catalysts tend to perform better in the first point while showing deficits in the latter one. In this study, a facile synthesis route towards self-supported metallic electrocatalyst nanoarchitectures with both aspects in mind is outlined. This procedure consists of a palladium seeding step of ion track-etched polymer templates followed by a nickel electrodeposition and template dissolution. With this strategy, free-standing nickel nanowire networks which contain palladium nanoparticles only in their outer surface are obtained. These networks are tested in anodic half-cell measurements for demonstrating their capability of oxidising methanol in alkaline electrolytes. The results from the electrochemical experiments show that this new catalyst is more tolerant towards high methanol concentrations (up to 5molL−1) than a commercial carbon supported palladium nanoparticle catalyst and provides a much better long-term stability during potential cycling.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr. Christina Roth
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 21 Jul 2021 09:41
Last Modified: 21 Jul 2021 09:41
URI: https://eref.uni-bayreuth.de/id/eprint/66671