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Hollow ternary PtPdCu nanoparticles: a superior and durable cathodic electrocatalyst
Xiao-Jing Liu1, Chun-Hua Cui1, Hui-Hui Li1
1Division of Nanomaterials and Chemistry , Hefei National Laboratory for Physical Sciences at Microscale , Collaborative Innovation Center of Suzhou Nano Science and Technology , Department of Chemistry , University of Science and Technology of China , Hefei , Anhui , 230026 , China . Email: shyu@ustc.edu.cn ; ; Tel: +86-551-63603040.
Researchers developed a new method for creating hollow platinum-palladium-copper (PtPdCu) nanoparticles using acetic acid. These novel hollow PtPdCu nanoparticles show enhanced durability and catalytic activity for oxygen reduction reactions in fuel cells.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Hollow alloyed nanoparticles (NPs) are promising electrocatalysts for fuel cells.
- Challenges in creating hollow structures include random metal leaching, surface passivation, and limited noble metal diffusion.
Purpose of the Study:
- To present a facile method for preparing hollow PtPdCu NPs.
- To demonstrate the effectiveness of acetic acid in the dealloying process.
- To challenge the notion that hollow alloyed NPs cannot be formed via dealloying.
Main Methods:
- Preparation of monodisperse alloy NPs.
- Acetic acid-assisted dealloying process.
- Characterization of the resulting hollow ternary PtPdCu NPs.
Main Results:
- Successfully synthesized single-cavity hollow PtPdCu NPs.
- Acetic acid acted as both an etchant and a surfactant remover.
- The dealloying process in a ternary system was further elucidated.
Conclusions:
- The developed method overcomes challenges in hollow NP synthesis.
- Hollow ternary PtPdCu NPs demonstrate superior durability and catalytic activity for oxygen reduction reaction.
- This work advances the understanding of dealloying strategies for NP fabrication.
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