Size-Engineered PdCd Nanocubes Enable Intermediate Desorption for Enhanced Durability in Ethylene Glycol...

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Ethylene glycol oxidation reaction (EGOR) is vital for fuel cells and PET upcycling.
• Catalyst deactivation from adsorbed intermediates limits EGOR practical use.

Purpose of the Study:

• Develop highly active and durable electrocatalysts for EGOR.
• Investigate PdCd intermetallic nanocubes synthesized via colloidal methods.

Main Methods:

• Colloidal synthesis of monodisperse PdCd intermetallic nanocubes (8-12 nm).
• Electrochemical evaluation of EGOR activity and stability in alkaline media.
• Density Functional Theory (DFT) calculations to understand reaction mechanisms.

Main Results:

• 12 nm PdCd nanocubes achieved a mass activity of 2.05 A mg_Pd^-1.
• Exceptional operational stability over 72 hours demonstrated.
• Enhanced resistance to CO poisoning and weak adsorption of intermediates observed.

Conclusions:

• Ordered intermetallic structure and controlled size enhance EGOR performance.
• PdCd nanocubes offer a promising strategy for advanced electrocatalyst design.
• Rational design of intermetallic nanocrystals can overcome EGOR limitations.