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Heterogeneous Catalysis

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Defect-Engineered Multi-Intermetallic Heterostructures as Multisite Electrocatalysts for Efficient Water Splitting.

Xiang-Feng Wu¹, Zi-Yan Li¹, Hui Wang¹

¹School of Materials Science and Engineering, Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment, Shijiazhuang Tiedao University, Shijiazhuang, 050043, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|April 17, 2025

Summary

This summary is machine-generated.

Researchers developed defect-engineered multimetallic heterostructures for efficient water splitting. These advanced electrocatalysts, like CoCuMoNi, show high activity and stability for renewable hydrogen production.

Keywords:

defect heterostructure multisite electrocatalyst multi‐intermetallic nanoporous metal water splitting

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Area of Science:

Materials Science
Electrochemistry
Renewable Energy

Background:

Efficient water splitting is crucial for producing renewable hydrogen.
Development of highly active and stable electrocatalysts is essential.
Existing electrocatalysts often lack the required performance and durability.

Purpose of the Study:

To design and synthesize defect-engineered multimetallic heterostructures for overall water splitting.
To enhance catalytic activity and stability through synergistic approaches.
To investigate the underlying mechanisms of improved performance.

Main Methods:

Synthesis of porous intermetallic alloys (CoCuMoNi) using high-temperature alloying-dealloying.
Atomic-scale defect engineering and creation of multiphase heterostructures.
Advanced characterization techniques and density functional theory (DFT) calculations.

Main Results:

CoCuMoNi catalyst demonstrated excellent bifunctional activity for hydrogen evolution reaction (14 mV@10 mA cm⁻²) and oxygen evolution reaction (211 mV@10 mA cm⁻²).
Achieved efficient overall water splitting at 1.559 V@100 mA cm⁻², outperforming conventional materials.
The catalyst exhibited superior stability and durability.

Conclusions:

Defect engineering and heterostructures synergistically boost electrocatalytic activity by modulating electronic properties and enhancing charge transfer.
The CoCuMoNi catalyst represents a promising platform for efficient and scalable water splitting.
This work paves the way for practical applications in clean energy technologies.