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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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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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Spatially Separated Plasmonic Catalysts for Selective CO₂ Electrochemical Conversion Using Interband/Intraband Hot

Chen Chi¹, Xue-Lu Chen¹, Jian Li¹

¹State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.

ACS Applied Materials & Interfaces

|March 26, 2026

Summary

This study introduces a novel gold-molybdenum disulfide hybrid catalyst for efficient solar-driven carbon dioxide (CO2) conversion. The catalyst enhances selectivity for valuable products like methanol, formic acid, and ethanol through controlled hot electron injection.

Keywords:

CO2 reduction reaction hot electron interband intraband transition plasmonic catalyst

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Area of Science:

Materials Science
Catalysis
Nanotechnology

Background:

Plasmonic nanostructures offer potential for solar energy utilization in CO2 conversion.
Noble metals like gold and silver have limitations in mediating multielectron reduction pathways for value-added products.

Purpose of the Study:

To design and investigate a spatially separated plasmonic-semiconductor hybrid catalyst for improved electrocatalytic CO2 reduction.
To understand the role of interband and intraband hot electrons in enhancing CO2RR selectivity and activity.

Main Methods:

Coupling molybdenum disulfide (MoS2) quantum dots to gold (Au) triangle nanoprisms to create a hybrid catalyst.
Investigating hot electron generation from interband and intraband transitions in Au and their injection into MoS2.
Analyzing the correlation between different hot electron energies and CO2RR product selectivity.

Main Results:

The Au-MoS2 hybrid catalyst effectively utilizes hot electrons from both interband and intraband transitions.
Interband hot electrons selectively enhanced methanol and formic acid production at different overpotentials.
Intraband hot electrons significantly increased ethanol selectivity through C-C coupling.

Conclusions:

Spatially separated catalysts offer unique advantages in plasmon-mediated electrochemical reactions.
Utilizing both interband and intraband hot electrons provides an effective strategy for efficient and selective CO2 reduction.