Preparation of rare earth metal ions promoted MnOx@halloysite catalyst for highly efficient catalytic oxidation of toluene

Huang, Jinyu; Zhang, Yinmin; Hao, Zhineng; Zhang, Yongfeng

doi:10.1016/j.clay.2023.107081

Cited by 5 publications

(1 citation statement)

References 51 publications

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“…The deactivation resulted from the competitive adsorption of water and toluene on the CeO 2 surface. 48,49 For Ir 1 /CeO 2 and Ir/CeO 2 -C, the effect of water vapor on the toluene oxidation was very slight, and the activity of the Ir 1 / CeO 2 catalyst remained relatively stable after twice the H 2 O stream. The reason is that the Ir species played a positive role in the presence of water.…”

Section: Catalytic Activity Stability and H 2 Omentioning

confidence: 99%

High-Performance Ir₁/CeO₂ Single-Atom Catalyst for the Oxidation of Toluene

Wang,

Zhou,

Wang

et al. 2024

Inorg. Chem.

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The elimination of toluene is an obligatory target with increasing VOC emission in recent years. This study successfully prepared a single-atom Ir catalyst (Ir1/CeO2) by a simple incipient wetness impregnation method, confirmed by in situ CO DRIFTS and AC-HAADF-STEM. Compared to the cluster Ir catalyst (Ir/CeO2-C), Ir1/CeO2 exhibited excellent catalytic performance, stability, and water resistance for the oxidation of toluene. By Raman, H2-TPR, O2-TPD, and XPS experiments, abundant oxygen defects and a unique Ir3+–Ov–Ce3+ structure were formed for the Ir1/CeO2 sample because it had a lower oxygen vacancy formation energy. Furthermore, the DFT results revealed that the Ir1/CeO2 sample had a lower ring-opening energy barrier and adsorption energy of the ring-opening products, which was the rate-determining step for the oxidation of toluene. This work provides instructive insights into the construction of Ir/CeO2 catalysts for the highly efficient removal of VOCs.

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Section: Catalytic Activity Stability and H 2 Omentioning

confidence: 99%