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Ammonia has been proposed as a potential carbon-free energy source. However, a highly active catalyst is required for ammonia oxidation to promote the combustion rate. In this study, the single-atom copper catalyst loaded on the reconstructed cerium dioxide (100) surface with the pocket-like structure ($Cu_1$/$CeO_4$-t-p) is constructed for ammonia oxidation, and the catalytic process is investigated using the density functional theory calculations corrected by on-site Coulomb interactions (DFT+U). The adsorptions of ammonia and oxygen, the dissociation of ammonia and the oxidation of the dissociated ammonia species are systematically examined.
}, issn = {2617-8575}, doi = {https://doi.org/10.4208/cicc.2025.43.01}, url = {http://global-sci.org/intro/article_detail/cicc/24046.html} }Ammonia has been proposed as a potential carbon-free energy source. However, a highly active catalyst is required for ammonia oxidation to promote the combustion rate. In this study, the single-atom copper catalyst loaded on the reconstructed cerium dioxide (100) surface with the pocket-like structure ($Cu_1$/$CeO_4$-t-p) is constructed for ammonia oxidation, and the catalytic process is investigated using the density functional theory calculations corrected by on-site Coulomb interactions (DFT+U). The adsorptions of ammonia and oxygen, the dissociation of ammonia and the oxidation of the dissociated ammonia species are systematically examined.