Ordered PdCu-Based Core-Shell Concave Nanocubes Enclosed by High-Index Facets for Ethanol Electrooxidation.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Crystal phase engineering is crucial for optimizing electrocatalyst performance.
• The ethanol oxidation reaction (EOR) is vital for clean energy technologies.
• Developing efficient and stable electrocatalysts remains a challenge.

Purpose of the Study:

• To synthesize and characterize Au@PdCu concave nanocubes (CNCs) with an ordered body-centered cubic (bcc) phase.
• To evaluate the electrocatalytic activity and stability of these CNCs for EOR.
• To understand the role of crystal phase and surface facets in enhancing catalytic performance.

Main Methods:

• Synthesis of Au@PdCu concave nanocubes with controlled crystal structure.
• Electrochemical characterization using techniques like cyclic voltammetry and chronoamperometry.
• Performance evaluation for the ethanol oxidation reaction (EOR).

Main Results:

• Au@PdCu CNCs with an ordered bcc PdCu alloy shell and high-index facets were successfully synthesized.
• These CNCs demonstrated significantly higher mass and specific activities for EOR compared to commercial Pd black.
• The catalysts exhibited excellent durability and antipoisoning ability.

Conclusions:

• Ordered bcc PdCu alloy phase and high-index facets are key to enhanced EOR activity.
• Au@PdCu CNCs represent a promising electrocatalyst for efficient and stable ethanol oxidation.
• The study highlights the potential of crystal phase engineering in catalyst design.