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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Updated: May 2, 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

"Superaerophobic" Nickel Phosphide Nanoarray Catalyst for Efficient Hydrogen Evolution at Ultrahigh Current

Xingxing Yu^1,2, Zi-You Yu², Xiao-Long Zhang²

¹Center for Clean Energy Technology, School of Mathematical and Physical Science, Faculty of Science , University of Technology Sydney , Sydney , NSW 2007 , Australia.

Journal of the American Chemical Society

|April 25, 2019

Summary

This study introduces a novel nickel phosphide (Ni2P) nanoarray catalyst for efficient, large-scale hydrogen production. Its unique superaerophobic surface enhances stability and hydrogen bubble release, crucial for practical applications.

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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

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Published on: December 6, 2021

Area of Science:

Electrochemistry
Materials Science
Renewable Energy

Background:

Developing non-noble metal electrocatalysts for efficient hydrogen production is critical.
Existing catalysts face challenges in activity, stability, and large-scale application.

Purpose of the Study:

To design and evaluate a novel Ni2P nanoarray catalyst for hydrogen evolution reaction (HER) in alkaline media.
To investigate the structure-activity relationship, focusing on the role of the superaerophobic surface.

Main Methods:

Fabrication of Ni2P nanoarrays on a commercial Ni foam substrate.
Electrocatalytic performance testing in a basic electrolyte.
Surface characterization to understand the catalyst's properties.

Main Results:

The Ni2P nanoarray catalyst exhibited outstanding electrocatalytic activity and stability.
High catalytic performance was attributed to favorable electron transfer, intrinsic activity, and substrate integration.
A unique superaerophobic surface facilitated timely H2 bubble release at high current densities (>1000 mA cm-2).

Conclusions:

The Ni2P nanoarray catalyst is highly effective for large-scale hydrogen production.
The superaerophobic surface is essential for robust gas evolution catalysis in practical applications.
This work provides insights into designing advanced electrocatalysts for renewable energy technologies.