School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, China; Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou 510006, China.
J Environ Sci (China). 2025 Mar;149:476-487. doi: 10.1016/j.jes.2024.01.001. Epub 2024 Jan 18.
Herein, three supported catalysts, CuO/AlO, CeO/AlO, and CuO-CeO/AlO, were synthesized by the convenient impregnation method to reveal the effect of CeO addition on catalytic performance and reaction mechanism for toluene oxidation. Compared with CuO/AlO, the T and T (the temperatures at 50% and 90% toluene conversion, respectively) of CuO-CeO/AlO were reduced by 33 and 39 °C, respectively. N adsorption-desorption experiment, XRD, SEM, EDS mapping, Raman, EPR, H-TPR, O-TPD, XPS, NH-TPD, Toluene-TPD, and in-situ DRIFTS were conducted to characterize these catalysts. The excellent catalytic performance of CuO-CeO/AlO could be attributed to its strong copper-cerium interaction and high oxygen vacancies concentration. Moreover, in-situ DRIFTS proved that CuO-CeO/AlO promoted the conversion of toluene to benzoate and accelerated the deep degradation path of toluene. This work provided valuable insights into the development of efficient and economical catalysts for volatile organic compounds.
在此，通过简便的浸渍法合成了三种担载型催化剂，CuO/Al2O3、CeO/Al2O3 和 CuO-CeO/Al2O3，以揭示 CeO 添加对甲苯氧化催化性能和反应机制的影响。与 CuO/Al2O3 相比，CuO-CeO/Al2O3 的 T50 和 T90（分别为甲苯转化率达到 50%和 90%时的温度）降低了 33 和 39°C。通过 N2 吸附-脱附实验、XRD、SEM、EDS mapping、Raman、EPR、H-TPR、O-TPD、XPS、NH3-TPD、甲苯-TPD 和原位 DRIFTS 对这些催化剂进行了表征。CuO-CeO/Al2O3 具有优异的催化性能，这归因于其较强的铜-铈相互作用和较高的氧空位浓度。此外，原位 DRIFTS 证明了 CuO-CeO/Al2O3 促进了甲苯向苯甲酸的转化，并加速了甲苯的深度降解途径。这项工作为开发高效、经济的挥发性有机化合物催化剂提供了有价值的见解。
