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• W4309336543 endingPage "108966" @default.
• W4309336543 startingPage "108966" @default.
• W4309336543 abstract "Understanding the underlying mechanism of NO reduction on supported metal catalysts has been a long standing challenge. Herein, we report an integrated experimental cum theoretical probe to elucidate the surface active sites vis à vis the plausible reaction mechanism to comprehend the catalytic reduction of NO over solid solutions of Ce 1-x Ni x O 2-δ . In the as-prepared solid solutions of phase pure Ce 1-x Ni x O 2-δ , minor component of Ni 2+ substituted Ce 4+ at the Wyckoff sites 4a resulting in a uniform distribution Ni 2+ within the crystal lattice of the parent fluorite CeO 2 . The as-prepared material exhibited a higher catalytic efficacy towards NO reduction in comparison with the Ni or NiO dispersed over CeO 2 support. The catalytic efficacy was further enhanced with reduced Ce 1-x Ni x O 2-δ due to the presence of excess oxygen vacancies and surface hydroxyl species. The important role of oxygen vacancies and surface hydroxyl species as active sites in the reaction mechanism was further corroborated by DFT calculations. A generalized kinetic model was developed that could identify the rate determining step for the NO reduction mechanism by H 2 over supported metal catalysts Ce 1-x Ni x O 2-δ . The reduced Ce 1-x Ni x O 2-δ due to the presence of excess oxygen vacancies and adsorbed surface hydroxyl species exhibited high catalytic NO reduciton. • Integrated experimental cum theoretical probe to elucidate the catalytic reduction of NO x . • Identifying the surface active sites of catalyst Ce 1-x Ni x O 2-δ . • Probing the rate determining step of the overall mechanism." @default.
• W4309336543 created "2022-11-26" @default.
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• W4309336543 date "2022-12-01" @default.
• W4309336543 modified "2023-10-16" @default.
• W4309336543 title "Probing the surface active sites of Ce1−xNixO2-δ for catalytic reduction of NO" @default.
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• W4309336543 doi "https://doi.org/10.1016/j.jece.2022.108966" @default.
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