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Updated: Jun 9, 2025

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Controlled synthesis of CeNbZrO solid solution with high thermal stability and application in catalytic degradation
Xiaoman He1, Xiaoxiang Han2, Weichun Pan2
1Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China.
Abstract:
A series of CeNbZrO composite oxides with different (CeNb)/Zr molar ratios were prepared by urea homogeneous precipitation method and systematically characterized. The thermal stability, degradation performance and structure-activity relationship of these catalysts for eliminating C6H5CH3 and C6H5Cl mixed pollutants were evaluated. The results indicated that with the increase of ZrO2 content, the catalytic activity of CeNbxZrO increased first and then decreased. Among them, the CeNb3.3ZrO catalyst (Ce/Nb/Zr=2/1/3.3, molar ratio) exhibited the highest catalytic activity (C6H5CH3: T90 %=310 °C, C6H5Cl: T90 %=344 °C) and thermal stability. Compared with the traditional CeO2-MnO2 catalyst, the T90 % of the CeNb3.3ZrO catalyst in the degradation of C6H5Cl was reduced by 100 °C. CeNb3.3ZrO exhibited high specific surface area and strong oxidation ability, which enhanced the redox cycles and promoted the interactions between metal ions. In addition, the formation of Ce2Zr3O10 solid solution made its structure stable even at high temperature. Overall, the optimized CeNb3.3ZrO has broad prospects in the catalytic treatment of volatile organic compounds and some other related fields in thermal catalysis.
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Catalysis