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Published on: December 6, 2021

Ru and Se Co-Doped Cobalt Hydroxide Electrocatalyst for Efficient Hydrogen Evolution Reactions.

Weizhong Peng¹, Yuting Yuan¹, Chao Huang¹

¹State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, China.

Molecules (Basel, Switzerland)

|August 12, 2023

Summary

This study introduces a novel co-doped cobalt hydroxide electrocatalyst (Ru-Co(OH)2-Se) for efficient hydrogen evolution reactions (HER). The new material demonstrates enhanced performance and stability, crucial for green energy applications.

Keywords:

HER electrodeposition electrolytic water elemental doping material compounding

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Published on: October 5, 2019

Area of Science:

Materials Science
Electrochemistry
Renewable Energy

Background:

Efficient electrocatalysts are vital for green hydrogen production.
Cobalt hydroxide-based materials are promising but require performance enhancement.

Purpose of the Study:

To develop a novel co-doped cobalt hydroxide electrocatalyst for improved hydrogen evolution reactions (HER).
To investigate the synergistic effects of ruthenium and selenium co-doping on catalyst performance and stability.

Main Methods:

Electrocatalyst synthesis via electrodeposition of ruthenium and selenium onto a cobalt hydroxide precursor.
Characterization of the co-doped catalyst (Ru-Co(OH)2-Se) using electrochemical techniques.
Evaluation of catalytic activity and stability for the hydrogen evolution reaction (HER).

Main Results:

The Ru-Co(OH)2-Se catalyst exhibited a lower overpotential (109 mV at 10 mA/cm²) for HER.
The material showed a reduced impedance and an increased electrochemically active surface area.
Excellent catalytic stability was observed, with no significant performance degradation after 50 hours of operation.

Conclusions:

Elemental co-doping with ruthenium and selenium is an effective strategy to enhance cobalt hydroxide electrocatalysts for HER.
The developed Ru-Co(OH)2-Se catalyst offers a promising pathway for efficient and stable hydrogen production.
This synergistic doping approach contributes to the advancement of clean energy technologies.