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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

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Self-supporting nanoporous CoMoP electrocatalyst for hydrogen evolution reaction in alkaline solution.

Weiguo Tang¹, Shengli Zhu², Hui Jiang³

¹School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.

Journal of Colloid and Interface Science

|June 28, 2022

Summary

This study presents a novel nanoporous cobalt-molybdenum phosphide (np-CoMoP) catalyst for efficient hydrogen production. This low-cost catalyst demonstrates superior hydrogen evolution reaction (HER) performance and stability in alkaline solutions.

Keywords:

CoMoP Dealloying Electrocatalysis Hydrogen evolution reaction Nanoporous

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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

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:

Efficient and low-cost catalysts are crucial for sustainable hydrogen production.
Cobalt phosphides show promise but require optimization for enhanced activity and stability.

Purpose of the Study:

To develop a novel nanoporous cobalt-molybdenum phosphide (np-CoMoP) catalyst.
To investigate the effect of molybdenum (Mo) incorporation on the electronic structure and catalytic performance.
To evaluate the hydrogen evolution reaction (HER) activity and stability of the np-CoMoP catalyst.

Main Methods:

Electrochemical dealloying method was employed to synthesize the self-supporting nanoporous CoMoP catalyst.
Characterization of the catalyst's structure and composition (e.g., nanoporous Co65Mo15P20).
Electrochemical testing in alkaline solution to assess HER performance.

Main Results:

The np-CoMoP catalyst exhibited enhanced electron transfer and increased active sites due to its unique nanostructure.
Superior HER performance was achieved with an overpotential of 40.8 mV at 10 mA cm⁻².
A low Tafel slope of 46.2 mV dec⁻¹ and excellent long-term stability were observed.

Conclusions:

Molybdenum incorporation effectively tunes the electronic structure of cobalt phosphide, optimizing hydrogen atom desorption.
The developed nanoporous CoMoP catalyst offers a promising low-cost and highly efficient solution for hydrogen production.
The catalyst demonstrates significant potential for industrial applications in electrocatalytic hydrogen generation.