Pd catalyst supported on CeO2 nanotubes with enhanced structural stability toward oxidative carbonylation of phenol
作者： Zengjie Fu , Zhimiao Wang , Hongjuan Wang , Fang Li , Wei Xue
DOI: 10.1039/C8RA10090J
关键词:
摘要: Ordered CeO2 nanotubes (CeO2-T) were prepared via a hydrothermal synthesis process using the triblock copolymer polyethylene oxide-polypropylene oxide-polyethylene oxide (P123) as morphology control agent. CeO2-T characterization demonstrated formation of single crystal structures having lengths between 1–3 μm and diameters < 100 nm. A supported Pd catalyst (Pd/CeO2-T) was also through means. H2-temperature reduction profile Raman spectroscopy analyses showed that oxygen vacancies on surface increased temperature decreased after loading onto CeO2-T. Pd/CeO2-T employed toward oxidative carbonylation phenol reaction conditions optimized. Phenol conversion 53.2% with 96.7% selectivity to diphenyl carbonate under optimal conditions. The integrity tubular structure maintained recycled, however, both activity significantly decreased, which mainly attributed active component leaching during reaction.
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