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Electrodeposition of palladium-dotted nickel nanowire networks as a robust self-supported methanol electrooxidation catalyst
- Publication Year :
- 2021
- Publisher :
- Freie Universität Berlin, 2021.
-
Abstract
- Abstract 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 $${5}\,\hbox{mol}\,\hbox{L}^{-1}$$ 5 mol L - 1 ) than a commercial carbon supported palladium nanoparticle catalyst and provides a much better long-term stability during potential cycling. Graphical Abstract
- Subjects :
- inorganic chemicals
Materials science
Nanowire
chemistry.chemical_element
Nanoparticle
02 engineering and technology
Electrocatalyst
Electrochemistry
Catalysis
chemistry.chemical_compound
0502 economics and business
General Materials Science
050207 economics
Mechanical Engineering
05 social sciences
021001 nanoscience & nanotechnology
Nickel
nanowire networks
chemistry
Chemical engineering
Mechanics of Materials
electrodeposition
Chemical Energy Carriers
methanol electrooxidation catalyst
Methanol
0210 nano-technology
500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
Palladium
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....a16155875acd78bd207b2a8c4a79bdd7
- Full Text :
- https://doi.org/10.17169/refubium-30756