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Controlling the Distribution of Metal Elements in Core@Shell Nanosheets for Highly Efficient Direct Formic Acid
Chengyuan Dong1, Huijun Song2, Lingzheng Bu3
1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
We developed novel platinum-telluride-bismuth hexagonal core@shell nanosheets for efficient formic acid oxidation. These advanced nanomaterials show significantly enhanced activity and stability, outperforming commercial catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Controlled synthesis of 2D platinum-based nanomaterials with specific phases and compositions is challenging.
- Platinum-based materials are crucial for catalysis, particularly in reactions like formic acid oxidation.
Purpose of the Study:
- To synthesize and characterize novel 2D platinum-telluride-bismuth hexagonal core@shell nanosheets (PtTe2Bi@PtxBi HCSNSs).
- To evaluate the performance of these HCSNSs in the formic acid oxidation reaction (FAOR).
Main Methods:
- Synthesis of PtTe2Bi@PtxBi HCSNSs with controlled core-shell structures and phases.
- Precise structural analysis using advanced techniques to determine atomic layer arrangements.
- Electrochemical evaluation of catalytic activity and stability for FAOR.
Main Results:
- PtTe2Bi@Pt3Bi HCSNSs exhibit specific and mass activities 52.1 and 46.9 times higher than commercial Pt/C.
- Achieved a membrane electrode assembly (MEA) power density of 169.6 mW cm-2 with enhanced stability.
- Demonstrated superior CO tolerance due to a favorable dehydrogenation pathway and weak CO binding.
Conclusions:
- The developed PtTe2Bi@PtxBi HCSNSs are highly efficient electrocatalysts for FAOR.
- The unique core@shell structure and phase control contribute to superior catalytic performance and stability.
- These findings offer a promising pathway for designing advanced catalysts for fuel cells and related applications.
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