Journal
CHEMICAL ENGINEERING JOURNAL
Volume 469, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.144007
Keywords
Ag; Benzyl alcohol; MnO2 nanorods; Oxidation; Vapor phase
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This study investigates the vapor phase oxidation of benzyl alcohol (BnOH) over morphologically designed spherical silver nanoparticles (AgNPs) decorated on manganese oxide nanorods (α-MnO2NRs) in the presence of air. The combination of AgNPs and α-MnO2NRs enables increased oxygen vacancies and strong metal-support interactions on the surface. The optimized 1 wt% Ag loaded catalyst (1Ag/MnO2NRs) shows excellent performance in benzyl alcohol oxidation due to its high adsorption capacity, enhanced oxygen vacancies, and redox properties. The designed 1Ag/α-MnO2NRs catalytic system achieves 2.6 times higher activity compared to α-MnO2NRs without Ag decoration. These findings provide insights for the rational design of shape-dependent metal/metal oxide catalysts.
Vapor phase benzyl alcohol (BnOH) oxidation reaction is investigated over a pre-synthesised morphologically designed shape controlled spherical silver nanoparticles (AgNPs) decorated on manganese oxide nanorods (& alpha;-MnO2NRs) in the presence of air. The combination of silver nanoparticles and the & alpha;-MnO2NRs interface enabled the increased oxygen vacancies (Ov) and exhibited the strong metal-support interactions (SMSI) in surface oxygen activation. The effect of Ag loadings is significant and the optimal 1 wt% Ag loaded catalyst (1Ag/ MnO2NRs) showed excellent performance in benzyl alcohol oxidation due to high adsorption capacity, enhanced oxygen vacancies and red-ox properties. The DFT calculations confirmed that the high BnOH surface adsorption was exhibited over Ag modified MnO2NRs than the bare & alpha;-MnO2NRs. The optimized 1Ag/& alpha;-MnO2NRs catalytic system achieved 2.6 fold higher activity compared to bare & alpha;-MnO2NRs. These results provided novel insights on the rational design of shape dependent metal/metal oxide based heterogeneous catalysts.
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