This study focused on the volatile organic compounds (VOCs) abatement by catalytic combustion/adsorption over Rh-based/ZSM-5. A series of Rh-based catalysts were prepared by wet co-impregnation method and evaluated by toluene combustion. Rh₁Cu₃/ZSM-5 presented superb toluene catalytic activity, great long-run stability, and excellent catalytic adaptability to various VOCs. Besides, Rh₁Cu₃/ZSM-5 performed good toluene adsorption capability in the column breakthrough experiments. Characterization results indicated that the interaction between Rh species and Cu oxides increased the content of chemisorbed oxygen in lattice layer (O_ads-chem), which improved the catalytic performance efficiently. Moreover, Rh₁Cu₃/ZSM-5 showed excellent adsorption ability for toluene due to its large specific surface area, and the strong interaction between metal nanoparticles and VOCs molecules. Overall, this kind of bifunctional materials with dual-metal modification were significant for the development of VOCs abatement.

Graphic Abstract

中文翻译：

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Rh1Cu3/ZSM-5 作为 VOCs 减排的高效双功能催化剂/吸附剂

本研究的重点是通过催化燃烧/吸附在 Rh 基/ZSM-5 上减少挥发性有机化合物 (VOC)。采用湿法共浸法制备了一系列Rh基催化剂，并通过甲苯燃烧进行了评价。Rh ₁ Cu ₃ /ZSM-5 表现出极好的甲苯催化活性、良好的长期稳定性和对各种VOC 的优异催化适应性。此外，Rh ₁ Cu ₃ /ZSM-5在柱穿透实验中表现出良好的甲苯吸附能力。表征结果表明，Rh物种与Cu氧化物之间的相互作用增加了晶格层中化学吸附氧的含量（O _ads-chem），从而有效地提高了催化性能。此外，Rh₁ Cu ₃ /ZSM-5由于其较大的比表面积以及金属纳米颗粒与VOCs分子之间的强相互作用而对甲苯表现出优异的吸附能力。总体而言，这种双金属改性的双功能材料对VOCs减排的发展具有重要意义。

图形摘要