首页|Enhanced catalytic oxidation of diluted ethylene oxide on Pt/CeO2 catalyst under low temperature
Enhanced catalytic oxidation of diluted ethylene oxide on Pt/CeO2 catalyst under low temperature
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NSTL
Elsevier
A thorough catalytic combustion toward diluted ethylene oxide (EO) is demonstrated. The Pt active phase and CeO2 support were selected to introduce a synergistic effect. As a result, a superior catalytic activity and less severe coking trend were observed on the Pt/CeO2 catalyst when compared with another widely-used Pt/Al2O3 catalyst. The XPS spectra and H-2-TPR profiles evidenced that the Pt/CeO2 catalyst has both stronger metal support interaction and more abundant oxygen vacancies, which is believed at the heart of its excellent performance. Finally, the degradation pathways of EO were explored by in-situ DRIFTS. The weak H2O affinity of Pt/ CeO2 catalyst can inhibit the polycondensation reaction and result in the favorable degradation of EO. In contrast, abundant hydroxyl species were present on the hydrophilic Pt/Al2O3 catalyst surface, which may serve as acid sites and complicate the EO degradation, and therefore various side products and carbon deposits would appear in this case.
NSTL
Elsevier
