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Updated: Jan 24, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Single Pt atom supported on penta-graphene as an efficient catalyst for CO oxidation
Ranganathan Krishnan1, Shiuan-Yau Wu1, Hsin-Tsung Chen1
1Department of Chemistry and R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli District, Taoyuan City, 32023, Taiwan. htchen@cycu.edu.tw.
A single platinum atom on penta-graphene (Pt/PG) shows excellent catalytic activity for CO oxidation. The tri-molecular Eley-Rideal (TER) pathway is identified as the most favorable mechanism for this single-atom catalyst.
Area of Science:
- Materials Science
- Catalysis
- Computational Chemistry
Background:
- Single-atom catalysts (SACs) offer unique properties for chemical reactions.
- CO oxidation is a critical process with significant industrial applications.
- Penta-graphene (PG) is an emerging material for catalyst supports.
Purpose of the Study:
- To investigate the potential of a single platinum atom supported on penta-graphene (Pt/PG) as a single-atom catalyst for CO oxidation.
- To elucidate the reaction mechanisms and identify the most favorable pathway for CO oxidation on Pt/PG.
- To provide insights into designing novel SACs based on penta-graphene.
Main Methods:
- Spin-polarized first-principles calculations were employed.
- Investigated Eley-Rideal (ER), Langmuir-Hinshelwood (LH), and tri-molecular Eley-Rideal (TER) mechanisms.
- Calculated activation energies for rate-limiting steps of each mechanism.
Main Results:
- The direct ER pathway (0.11-0.20 eV) and TER pathway (0.35 eV) were found to be more favorable than the LH pathway (0.45 eV).
- The TER pathway was identified as the most favored mechanism due to stronger CO adsorption compared to O2.
- Pt/PG demonstrated excellent catalytic activity for CO oxidation.
Conclusions:
- Pt/PG functions as a highly active single-atom catalyst for CO oxidation.
- The tri-molecular Eley-Rideal (TER) mechanism is the predominant reaction pathway.
- This study offers a new strategy for developing penta-graphene-based single-atom catalysts.
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