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Trace Ru-Doped PtCuRu@PtRu Core-Shell Electrocatalyst for CO-Resilient Methanol Oxidation
Tianrui Xue1, Shiyue Xing1, Zhongliang Liu1
1Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai, P. R. China.
A novel core-shell electrocatalyst enhances methanol oxidation reaction (MOR) activity and durability. This advanced catalyst design prevents metal dissolution and boosts efficiency for fuel cell applications.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Platinum-based catalysts are crucial for methanol oxidation reaction (MOR) in fuel cells.
- Challenges include limited water dissociation and transition metal dissolution, reducing catalyst performance and lifespan.
Purpose of the Study:
- To develop a Pt-based core-shell electrocatalyst that overcomes limitations in water dissociation and metal dissolution for enhanced MOR.
- To improve both the activity and durability of catalysts for fuel cell applications.
Main Methods:
- Synthesis of a PtCuRu-0.05@PtRu core-shell electrocatalyst using liquid-phase reduction and in-situ electrochemical dealloying.
- Characterization of catalyst structure, composition, and electrochemical performance for MOR.
Main Results:
- The PtCuRu-0.05@PtRu catalyst demonstrated a mass activity of 1.208 A mgPt⁻¹, significantly outperforming commercial Pt/C and PtCu@Pt.
- Exceptional durability was observed, with minimal activity decay after extensive testing and preserved structural integrity.
Conclusions:
- The synergistic effects of Ru doping, compressive strain, and a protective Pt-rich shell effectively enhance MOR activity and durability.
- This core-shell catalyst design offers a promising strategy for advancing fuel cell technology by addressing key performance bottlenecks.
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