Galvanic replacement mediated morphological adjustments boost nanoparticle performance in electrocatalytic alcohol...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Alcohol oxidation reactions (AOR) are crucial for fuel cells.
• Developing efficient and CO-tolerant catalysts is a key challenge.
• Platinum-based nanoalloys are promising but require further optimization.

Purpose of the Study:

• To synthesize and characterize a novel PdPtCo core-shell nanostructure.
• To evaluate the catalytic performance of the nanostructure in AOR.
• To understand the synergistic effects influencing catalytic activity and CO tolerance.

Main Methods:

• Fabrication of PdPtCo core-shell nanostructures via galvanic replacement at room temperature.
• Incorporation of Palladium (Pd) into Platinum-Cobalt (PtCo) nanoalloys.
• Electrochemical testing for alcohol oxidation and CO tolerance.

Main Results:

• The PdPtCo core-shell nanostructure exhibits excellent performance in AOR.
• Synergistic effects between Pd, Pt, and Co lower Pt electron density, facilitating C-C bond cleavage.
• Increased Cobalt (Co) coverage on the surface reduces adsorbed CO (CO_ads) binding, enhancing CO tolerance.

Conclusions:

• The developed PdPtCo core-shell nanostructure represents a novel and effective strategy for high-performance AOR catalysts.
• The catalyst design offers improved efficiency and durability for fuel cell applications.
• This approach provides insights into designing advanced electrocatalysts through controlled nanostructure engineering.