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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: Sep 17, 2025

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

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Enhanced catalytic activity on atomically dispersed PtSe₂ two-dimensional layers.

Gyuho Han¹, Hyuk Choi², Jong Hun Kim^3,4

¹Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.

Nature Communications

|July 3, 2025

Summary

Atomically dispersed platinum on platinum diselenide (PtSe2) acts as a highly effective catalyst for carbon monoxide oxidation. This novel design prevents particle aggregation and enhances catalytic activity through unique electronic interactions.

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Area of Science:

Materials Science
Catalysis
Surface Chemistry

Background:

Designing efficient heterogeneous catalysts with high surface density and preventing metal agglomeration is crucial.
Transition metal dichalcogenides (TMDs), like platinum diselenide (PtSe2), show promise due to their unique properties.

Purpose of the Study:

To propose and investigate a catalyst design using atomically dispersed transition metals on TMDs.
To elucidate the role of surface-exposed platinum species on PtSe2 as catalytic sites.

Main Methods:

Operando ambient-pressure X-ray photoelectron spectroscopy to study surface Pt species.
Density functional theory (DFT) calculations to confirm electronic structure and O2 coverage.
Investigating CO oxidation performance under varying conditions.

Main Results:

Confirmed substantial surface-exposed Pt species on PtSe2 acting as catalytic sites.
Achieved high O2 coverage on PtSe2 by mitigating CO adsorption, leading to enhanced CO oxidation.
DFT calculations verified the d-band structure and high O2 coverage.

Conclusions:

Atomically dispersed transition metals on TMDs offer a viable strategy for catalyst design.
PtSe2 exhibits potential for high catalytic activity due to electronic metal-chalcogen interactions and favorable O2 adsorption.
This approach enables diverse reaction mechanisms and improved catalytic performance.