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Vertically Oriented Metallic Heterodimer Array Semiembedded in Flat Conductive Carbon Film for Electrochemical
Shunsuke Shiba1, Ayaka Koike2, Shota Takahashi2
1Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 3, Matsuyama, Ehime 790-8577, Japan.
ACS Nano
|June 27, 2022
Summary
A novel electrodeposition method creates oriented metallic heterodimer arrays without surfactants or solvents. This technique enables tunable catalytic properties, demonstrated by enhanced glucose oxidation using nickel/palladium heterodimers.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing advanced nanomaterials with controlled architectures is crucial for catalysis.
- Existing methods for synthesizing metallic heterodimers often involve complex procedures and harsh chemicals.
Purpose of the Study:
- To propose a general and surfactant-free synthesis of highly oriented metallic heterodimer arrays.
- To demonstrate the fabrication and properties of nickel/palladium heterodimers for electrocatalysis.
Main Methods:
- Selective electrodeposition onto metal nanoparticle-embedded carbon films.
- Utilizing differences in electrodeposition overpotentials for selective nanoparticle growth.
- Cosputtering technique for fabricating nanoparticle-embedded carbon films.
Main Results:
- Successfully synthesized a nickel/palladium heterodimer array with controlled orientation.
- Observed charge transfer between nickel and palladium nanoparticles, indicating tunable properties.
- The heterodimer array exhibited enhanced electrocatalytic activity for glucose oxidation compared to controls.
Conclusions:
- The proposed selective electrodeposition is a versatile method for creating metallic heterodimers.
- Nickel/palladium heterodimers show significant potential for electrocatalytic applications, particularly in glucose oxidation.
- The synthesized structures possess mechanical stability and tunable electronic properties.
