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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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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

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Misfit-Strain-Guided Phase Separation for Programmable Patterned Catalysts with Spatiotemporal Adaptability.

Yiwen Su¹, Shurong Li², Xinzhong Wang¹

¹Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, 999077, China.

Advanced Materials (Deerfield Beach, Fla.)

|November 13, 2025

Summary

This summary is machine-generated.

This study introduces a new model for designing catalysts by considering mechanical strain, leading to highly active materials for converting nitrate to ammonia. This strain-guided approach enables predictable and efficient catalyst development.

Keywords:

elastic heterogeneity misfit strains nitrate electroreduction phase separation catalyst turing patterns

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Area of Science:

Materials Science
Chemical Engineering
Surface Chemistry

Background:

Rational catalyst patterning is crucial for controlling reactivity.
Existing methods like Turing patterns lack mechanical considerations for abiotic systems.
Developing mechanically informed models is essential for predictive catalyst design.

Purpose of the Study:

To develop a strain-guided phase separation model for designing patterned nanostructures.
To investigate the interplay between elastic heterogeneity and morphological evolution in alloy films.
To synthesize and characterize a novel catalyst for electrocatalytic nitrate reduction to ammonia (eNRA).

Main Methods:

Utilized Cahn-Hilliard-Cook and Ginzburg-Landau frameworks.
Incorporated misfit-strain principles to guide phase separation.
Employed spotty amorphous cobalt phosphide (Co-P) nanoglass synthesis.
Conducted operando spectroscopies and density functional theoretical calculations.

Main Results:

Developed a model enabling programmable design of nanostructures via Young's modulus and stress modulation.
Synthesized a strain-programmed amorphous Co-P nanoglass with segregated phases.
Demonstrated record-high activity and robust adaptability for electrocatalytic nitrate reduction to ammonia (eNRA).

Conclusions:

The misfit-strain strategy provides a mechanically informed framework for catalyst design.
This approach is broadly applicable to diverse chemistries and materials platforms.
Enables predictive design of dynamic, phase-engineered catalysts.