Porous Ni@Pt core-shell nanotube array electrocatalyst with high activity and stability for methanol oxidation

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Bimetallic core-shell nanostructures offer superior properties compared to monometallic counterparts for catalysis and electronics.
• Developing efficient and cost-effective catalysts is crucial for energy conversion technologies.

Purpose of the Study:

• To synthesize and characterize novel porous Ni@Pt core-shell nanotube arrays.
• To evaluate the electrocatalytic performance of these nanostructures for methanol oxidation.
• To assess their potential as low-cost, high-performance catalysts.

Main Methods:

• Fabrication of porous Ni@Pt core-shell nanotube arrays using ZnO nanorod template-assisted electrodeposition.
• Characterization of nanostructure morphology and surface area.
• Electrocatalytic testing for methanol oxidation activity and stability.

Main Results:

• Successfully synthesized porous Ni@Pt core-shell nanotube arrays with a high electrochemically active surface area (50.08 m²/g Pt).
• Demonstrated significantly enhanced electrocatalytic activity and stability for methanol oxidation compared to commercial Pt/C catalysts.
• The synthesis method is suitable for large-scale, low-cost production, reducing platinum loading and cost.

Conclusions:

• Porous Ni@Pt core-shell nanotube arrays are promising high-performance catalysts for methanol electrooxidation.
• The facile synthesis method enables cost-effective, large-scale production.
• These nanostructures represent a significant advancement in catalyst design for energy applications.