Precise Construction of Asymmetrically Coordinated PtCuZn Trimetallic Atom Catalysts for Efficient Oxygen Reduction

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Atomic-level catalyst design is crucial for optimizing chemical reactions.
• Polymetallic catalysts offer tunable electronic properties for enhanced performance.

Purpose of the Study:

• To synthesize and evaluate a novel platinum-copper-zinc trimetallic catalyst (PtCuZn/SNC) for acidic oxygen reduction reactions.
• To investigate the electronic interactions and charge redistribution within the triatomic catalyst structure.

Main Methods:

• Spatial confinement and polymer coating methods were employed for catalyst synthesis.
• Electrochemical testing, including oxygen reduction reaction (ORR) analysis, was performed.
• Fuel cell tests were conducted to assess energy density and performance.

Main Results:

• The PtCuZn/SNC catalyst exhibited a high half-wave potential of 0.859 V in ORR tests.
• An impressive energy density of 532 mW cm⁻² was achieved in fuel cell tests.
• The triatomic structure facilitated electronic interactions, optimizing intermediate adsorption/desorption.

Conclusions:

• Monodisperse triatomic catalysts represent a promising strategy for advancing fuel cell technology.
• The PtCuZn/SNC catalyst demonstrates outstanding catalytic activity and efficiency for hydrogen/oxygen fuel cells.