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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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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

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Double loading of nickel phosphide surface for efficient hydrogen evolution reaction.

Junyu Wang¹, Fuyu Tian¹, Lei Zhang²

¹State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, China.

Journal of Colloid and Interface Science

|June 14, 2024

Summary

This study introduces a novel Ag-AgP2/Ni2P catalyst for enhanced hydrogen evolution reaction (HER) activity. The dual loading strategy optimizes hydrogen adsorption, leading to superior catalytic performance and stability.

Keywords:

Double loading Electrocatalyst Hydrogen evolution reaction Silver phosphide

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Last Updated: May 20, 2026

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Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

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Published on: February 19, 2018

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Metal phosphides are promising electrocatalysts for the hydrogen evolution reaction (HER) due to their conductivity and stability.
Optimizing hydrogen adsorption on catalyst surfaces is key to improving HER activity.

Purpose of the Study:

To develop a novel heterogeneous catalyst with enhanced HER activity.
To investigate the effect of a dual loading strategy on catalyst performance.
To explore the application of AgP2 materials in HER for the first time.

Main Methods:

A double loading strategy was employed to synthesize Ag and AgP2 heterogeneous structures on Ni2P nanosheets (Ag-AgP2/Ni2P).
Synthesis involved liquid-phase adsorption of precursors followed by heat-treatment phosphorization.
Density functional theory (DFT) calculations were used to analyze the electronic structure and hydrogen adsorption properties.

Main Results:

The Ag-AgP2/Ni2P catalyst demonstrated optimized charge distribution and d-band center, leading to hydrogen adsorption free energy closer to electroneutrality.
The catalyst exhibited excellent HER performance in alkaline media, achieving 10 mA cm-2 at an overpotential of 78 mV.
The catalyst showed remarkable stability, maintaining performance for up to 200 hours.

Conclusions:

The dual loading strategy is effective in creating advanced heterogeneous electrocatalysts.
Ag-AgP2/Ni2P represents a significant advancement in HER catalysis, offering high activity and stability.
This work broadens the scope for developing novel heterogeneous electrocatalysts.