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The confined surface C2N/Pt(111) as a highly efficient catalyst for CO oxidation
Yiqun Guo1, Yongdao Chen2, Xiangmei Duan1
1School of Physical Science and Technology, Ningbo University, Ningbo-315211, P. R. China. duanxiangmei@nbu.edu.cn.
This study introduces C2N/Pt(111) catalysts to prevent catalyst poisoning in carbon monoxide (CO) oxidation. The C2N layer enhances reactivity and protects the platinum surface, improving CO oxidation efficiency.
Area of Science:
- Catalysis science
- Surface chemistry
- Materials science
Background:
- Catalyst poisoning, particularly on platinum (Pt) surfaces, hinders CO oxidation reactions.
- Developing robust catalysts is crucial for industrial applications requiring efficient CO oxidation.
Purpose of the Study:
- To investigate the effect of a C2N overlayer on Pt(111) for CO oxidation.
- To understand how C2N modifies the adsorption properties of reactants and products on the Pt surface.
- To evaluate the potential of C2N/Pt(111) catalysts in mitigating catalyst poisoning.
Main Methods:
- Computational construction of lattice-matched C2N/Pt(111) catalysts with varying configurations (top, fcc, hcp).
- Calculation of adsorption energies for CO, O, O2, and CO2 on the modified catalyst surfaces.
- Comparative analysis of catalytic performance between C2N/Pt(111) and pure Pt(111).
Main Results:
- The confined space within C2N/Pt(111) reduces CO adsorption energy by 0.35–0.43 eV.
- Adsorption of O/O2 reactants is strengthened, while CO2 adsorption energy becomes positive.
- The C2N cover effectively protects the Pt surface and facilitates reactant approach.
Conclusions:
- The C2N overlayer on Pt(111) enhances CO oxidation by modifying adsorption properties and preventing poisoning.
- This approach offers a strategy for creating more stable and efficient catalysts for CO oxidation under harsh conditions.
- The C2N cover acts as a protective shield while enabling facile reactant intercalation.
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