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Electrodeposition

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...

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Updated: Aug 20, 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

Bimetallic co-doping engineering over nickel-based oxy-hydroxide enables high-performance electrocatalytic oxygen

Ruopeng Li¹, Penghui Ren¹, Peixia Yang¹

¹MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 150001 Harbin, China.

Journal of Colloid and Interface Science

|November 19, 2022

Summary

This study introduces a novel nickel-cobalt-iron oxy-hydroxide catalyst (NiCoFeO_xH_y-NF) that significantly enhances the oxygen evolution reaction (OER) for efficient water electrolysis and CO₂ electroreduction.

Keywords:

CO(2) electroreduction Heteroatoms co-doping Nickel-based oxy-hydroxides Oxygen evolution reaction Water electrolysis

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Published on: June 21, 2017

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Efficient electrocatalysts are crucial for energy-saving water electrolysis and CO₂ electroreduction.
The oxygen evolution reaction (OER) is a key bottleneck in these processes.

Purpose of the Study:

To develop a highly active and stable electrocatalyst for the oxygen evolution reaction (OER).
To investigate the mechanism behind enhanced OER performance through bimetallic co-doping.

Main Methods:

Fabrication of nickel-cobalt-iron collaborative oxy-hydroxide on nickel foam (NiCoFeO_xH_y-NF).
Electrochemical characterization including OER activity, Tafel slope, and long-term stability tests.
Computational simulations and in-situ Raman spectroscopy to understand the catalytic mechanism.

Main Results:

NiCoFeO_xH_y-NF demonstrated superior OER activity (10 mA cm^-2 at 194 mV) and stability compared to bimetallic catalysts.
Computational and experimental data revealed that heteroatom-induced ligand distortion optimizes electronic structure and intermediate adsorption.
In-situ Raman spectroscopy identified a phase transition that enhances electron-mass transfer and active site exposure.

Conclusions:

Bimetallic co-doping engineering is an effective strategy to boost the electrocatalytic OER performance of nickel-based hydroxides.
The NiCoFeO_xH_y-NF catalyst shows promise for practical applications in water electrolysis and CO₂ electroreduction, producing H₂ and C₂H₄.