Effect of cesium ion on the synthesis and catalytic properties with FeCo Prussian blue analogue - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Chemical Physics Letters Year : 2018

Effect of cesium ion on the synthesis and catalytic properties with FeCo Prussian blue analogue

Abstract

In this article, cesium ions were introduced into the FeCo Prussian blue analogues (PBA) catalyst to increase the styrene conversion and the selectivity in styrene oxide in the reaction of epoxidation of styrene. The conversion of styrene over CsFeCoPBA-1 on the optimal condition reach up to 96%, in comparison to 88% over FeCoPBA. The catalysts were characterized by fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy (TEM), X-ray energy dispersive spectroscopy (EDS), thermogravimetric analysis (TG) and N2 adsorption/desorption, respectively. To further illustrate the phenonmen, the detailed kinetic studies on epoxidation of styrene were carried out. It is found that the rate equations is similar between the catalyst CsFeCoPBA-1 and FeCoPBA, while the reaction activation energy with CsFeCoPBA-1 catalyst is reduced obviously. Meanwhile, isothermal titration calorimetry (ITC) had also been employed to directly probe thermodynamic changes during the formation of the PBA with or without Cs ions. It is noteworthy that higher enthalpy change in the presence of cesium ions.
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Dates and versions

hal-02000530 , version 1 (30-01-2019)

Identifiers

  • HAL Id : hal-02000530 , version 1

Cite

Shuyue Guo, Yanling Liang, Simon Tricard, Ning Wang, Lei Feng, et al.. Effect of cesium ion on the synthesis and catalytic properties with FeCo Prussian blue analogue. Chemical Physics Letters, 2018, 710, pp.180-187. ⟨hal-02000530⟩
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