AI Article Synopsis
- The study focuses on creating an effective catalyst for eliminating toluene, a volatile organic compound (VOC), due to rising emissions.
- Researchers developed a single-atom Ir catalyst (Ir/CeO) using a straightforward method, which showed superior performance compared to a cluster version (Ir/CeO-C) in terms of stability and water resistance.
- Various experiments indicated that Ir/CeO had unique structural benefits and lower energy barriers for oxidation reactions, offering valuable insights for improving catalysts aimed at VOC removal.
Article Abstract
The elimination of toluene is an obligatory target with increasing VOC emission in recent years. This study successfully prepared a single-atom Ir catalyst (Ir/CeO) by a simple incipient wetness impregnation method, confirmed by in situ CO DRIFTS and AC-HAADF-STEM. Compared to the cluster Ir catalyst (Ir/CeO-C), Ir/CeO exhibited excellent catalytic performance, stability, and water resistance for the oxidation of toluene. By Raman, H-TPR, O-TPD, and XPS experiments, abundant oxygen defects and a unique Ir-Ov-Ce structure were formed for the Ir/CeO sample because it had a lower oxygen vacancy formation energy. Furthermore, the DFT results revealed that the Ir/CeO 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/CeO catalysts for the highly efficient removal of VOCs.
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| http://dx.doi.org/10.1021/acs.inorgchem.3c04589 | DOI Listing |
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