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Updated: Oct 1, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

Two-Dimensional Palladium Phosphoronitride for Oxygen Reduction.

See Wee Koh¹, Jie Hu², Hoje Chun³

¹School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore.

ACS Applied Materials & Interfaces

|March 7, 2022

Summary

This summary is machine-generated.

Researchers developed a novel 2D palladium phosphoronitride (Pd₃P₂N₂) catalyst for the oxygen reduction reaction (ORR). This new catalyst demonstrates a five-fold increase in mass activity and superior performance compared to commercial platinum/carbon.

Keywords:

DFT rational design oxygen reduction reaction (ORR)palladium thiophosphate substitutional nitrogen doping ternary palladium phosphoronitride two-dimensional catalyst

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Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Two-dimensional (2D) catalysts offer high activity due to atomic exposure.
Palladium (Pd) is promising for oxygen reduction reaction (ORR) but 2D Pd catalysts are scarce.

Purpose of the Study:

To synthesize and characterize a novel 2D ternary palladium phosphoronitride (Pd₃P₂N₂) for ORR catalysis.
To investigate the mechanism behind its enhanced catalytic activity.

Main Methods:

First-principles density functional theory (DFT) calculations guided the rational design.
Post-synthesis substitutional doping of Pd₃P₂S₈ replaced sulfur with nitrogen, preserving 2D morphology.

Main Results:

The synthesized Pd₃P₂N₂ exhibited a five-fold increase in mass activity compared to Pd₃P₂S₈.
Pd₃P₂N₂ showed a diffusion-limited current density (6.2 mA cm⁻²) exceeding commercial Pt/C.
The catalyst demonstrated fast kinetics and robust long-term stability.

Conclusions:

2D Pd₃P₂N₂ is a highly active and stable ORR catalyst.
DFT calculations provided insights into the doping process and catalytic mechanism.
This work paves the way for developing advanced 2D Pd-based catalysts.