Application, performance and mechanism of high-entropy catalysts for degradation of heterocyclic compounds

作者：Bai, Yuhe^*; Wang, Li^*; Tao, Qiangqiang; Lu, Shuai; Zhang, Aixin; Li, Kang; Hu, Ning

来源：Journal of Water Process Engineering, 2023, 56: 104392.

DOI：10.1016/j.jwpe.2023.104392

• High-entropy catalysts
• Ultra-fast catalytic
• Oxidation degradation
• Heterocyclic compounds

High-entropy catalysts have attracted great interest due to their unique microstructures, excellent thermal stability and catalytic activity for various reactions. In this study, three high-entropy catalysts were prepared by doping CeO2 with transition metal oxides that have full redox cycle capability. Their performance for the ultrafast catalytic oxidation degradation of heterocyclic compounds was investigated. Compared with the reaction without catalysts, the high-entropy catalysts could significantly shorten the residence time and improve the reaction efficiency, indicating that they could promote the oxidation reaction. Under the conditions of reaction temperature (T) = 390 degrees C and oxidation coefficient (OC) = 2.90, the chemical oxygen demand (COD) removal rate of the high-entropy oxide catalyst (AlTiCeFeCu)Ox@TA reached 94.52 % after 8 min of reaction. Moreover, characterization analysis revealed that the high-entropy catalysts prepared by doping appropriate transition metal oxides exhibited excellent catalytic activity and stability, providing new insights for the research of efficient catalysts in the ultra-fast oxidation system.