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Updated: May 5, 2026

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

Structural Transformations in Nickel-Doped Lanthanum-Based Electrocatalyst for Enhanced Oxygen Evolution Reaction.

Novuhulu Rhakho¹, Sayali Ashok Patil¹, P Muthu Austeria¹

¹Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Ramanagara, Bangalore 562112, Karnataka, India.

ACS Applied Materials & Interfaces

|June 3, 2025

Summary

Nickel doping in lanthanum-based materials enhances oxygen evolution reaction (OER) electrocatalyst performance by improving conductivity and creating porous structures. This study optimizes Ni concentration for stable lattices and superior OER activity.

Keywords:

NiLa2O(CO3)2 nickel doping oxygen evolution reaction porous structure structural transformation

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Last Updated: May 5, 2026

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Metal oxides are promising electrocatalysts for the oxygen evolution reaction (OER) but suffer from poor conductivity.
Tuning d-orbital population and inducing porosity can improve charge transfer kinetics.
Nickel (Ni) doping can enhance electronic conductivity and lattice stability in lanthanum (La)-based materials.

Purpose of the Study:

To investigate the effect of Ni doping on the structural transformation and OER performance of La-based materials.
To understand the correlation between Ni doping concentration, lattice stability, and interfacial charge transfer.
To optimize the design of efficient electrocatalysts through doping and calcination.

Main Methods:

Synthesis of Ni-doped LaOHCO3 materials with varying Ni concentrations.
Characterization of structural transformations using techniques like SEM.
Electrochemical evaluation of OER activity in alkaline conditions.

Main Results:

Increasing Ni doping transformed petal structures from thick and broad to thin and sharp, indicating improved electron redistribution and active site density.
Calcination of Ni-doped LaOHCO3 resulted in porous Ni2O(CO3)2 microflowers with superior OER activity.
The optimized Ni0.028La2O(CO3)2 microflowers exhibited an overpotential of 309 mV at 10 mA cm-2, attributed to enhanced ion diffusion and charge transfer.

Conclusions:

Ni doping effectively tunes the electronic conductivity and structural stability of La-based materials for OER.
A clear correlation exists between Ni doping concentration and OER performance, with an optimal concentration identified.
The study provides insights into designing and constructing efficient electrocatalysts by controlling doping and calcination processes.