Ce ion substitution position effect on catalytic activity of OMS-2 for benzene oxidation
Source abstract
Abstract
Abstract Ce ions incorporated OMS-2 samples with Ce ions located at tunnel and framework were prepared and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 adsorption/ desorption, inductively coupled plasma (ICP), and X-ray photoelectron spectroscopy (XPS). The effect of Ce ions substitution position on lattice oxygen activity of OMS-2 was investigated by density functional theory (DFT) calculations and CO temperature-programmed reduction (CO-TPR). The result showed that Ce ions located at the OMS-2 tunnel promoted the lattice oxygen activity of OMS-2, however, Ce ion located at the framework of OMS-2 to substitute Mn ion decreased the lattice oxygen activity. The enhancement of catalytic activity of OMS-2 with Ce ion located at tunnel compared to OMS-2 with Ce ion located at framework is attributed to its greater lattice oxygen activity, thus considerably improving the catalytic activity for benzene oxidation.
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Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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