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Ultrathin Palladium Nanomesh for Electrocatalysis
Jingjie Ge1, Pei Wei2, Geng Wu1
1Center of Advanced Nanocatalysis (CAN) and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.
Angewandte Chemie (International Ed. in English)
|February 8, 2018
Summary
Ultrathin palladium nanomeshes were synthesized for enhanced catalysis. These nanomeshes show superior performance in ethanol electrooxidation and can support other noble metals for hydrogen evolution reactions.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Developing advanced nanomaterials is crucial for efficient catalysis.
- Palladium-based nanostructures offer unique electronic and surface properties.
- Nanomeshes with high surface area are desirable for catalytic applications.
Purpose of the Study:
- To synthesize ultrathin palladium nanomeshes using a solution-based method.
- To investigate the catalytic performance of these nanomeshes for ethanol electrooxidation.
- To explore the potential of palladium nanomeshes as supports for other catalytic noble metals.
Main Methods:
- Solution-based oxidative etching to create ordered palladium nanomeshes.
- Characterization of the nanomeshes' structure and surface area.
- Electrochemical testing for ethanol electrooxidation and hydrogen evolution reactions.
Main Results:
- Successfully synthesized ~3 nm thick palladium nanomeshes with an ordered, interconnected 2D network.
- Achieved superior catalytic performance for ethanol electrooxidation with a mass activity of 5.40 A/g and specific activity of 7.09 mA/cm² at 0.8 V vs. RHE.
- Demonstrated the nanomeshes' potential as supports for platinum, yielding high hydrogen evolution reaction activity and durability.
Conclusions:
- Ultrathin palladium nanomeshes possess a unique mesoporous structure ideal for catalysis.
- These nanomeshes exhibit excellent catalytic efficiency for ethanol electrooxidation.
- The ordered mesh structure serves as a versatile platform for supporting other noble metals, enhancing their catalytic properties for reactions like HER.
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