Mesoporous Bimetallic Au@Rh Core-Shell Nanowires as Efficient Electrocatalysts for pH-Universal Hydrogen Evolution

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Electrochemical water splitting is a key strategy for sustainable hydrogen production.
• Developing efficient electrocatalysts for the hydrogen evolution reaction (HER) across all pH values remains a critical challenge.

Purpose of the Study:

• To design and synthesize novel mesoporous bimetallic core-shell nanostructures for enhanced HER electrocatalysis.
• To investigate the synergistic effects of gold nanowires (Au NWs) as cores and mesoporous rhodium (mRh) as shells (Au@mRh NWs) for HER.

Main Methods:

• Preparation of one-dimensional (1D) mesoporous bimetallic core-shell nanostructures (Au@mRh NWs).
• Electrochemical characterization of Au@mRh NWs for hydrogen evolution reaction (HER) activity under universal pH conditions.

Main Results:

• The synthesized Au@mRh NWs exhibit a unique 1D mesoporous core-shell structure.
• These nanostructures demonstrate significantly improved electrochemical activity for HER due to increased active sites and synergistic effects.
• High catalytic performance was observed across a wide range of pH values.

Conclusions:

• The developed Au@mRh NWs represent a highly efficient electrocatalyst for the hydrogen evolution reaction.
• The versatile strategy for creating mesoporous bimetallic core-shell structures shows great promise for various electrocatalytic applications.
• This work advances the development of catalysts for efficient and sustainable hydrogen production.