用不同的过渡金属（Mn、Ni和Fe）取代Co₃O₄中A位Co合成MCo₂O₄纳米片整体式催化剂（MCo-NS），并以甲苯为单芳烃模型测试深度氧化挥发性有机化合物（VOCs）性能。氢气程序升温还原（H₂-TPR）、X射线光电子能谱学（XPS）分析及性能测试结果表明，Mn和Ni取代Co₃O₄中的A位Co，不仅有助于提高催化剂的氧化还原能力，而且有利于表面氧空位的生成和表面吸附氧的活化，从而表现出比参考催化剂Co-NS更高的催化甲苯氧化性能。其中，MnCo₂O₄纳米片催化剂因具有较高的氧化还原能力及丰富的表面吸附氧物种而展示出最高的催化甲苯氧化活性，其T₉₀为254℃，优于NiCo-NS和FeCo-NS；同时，MnCo₂O₄纳米片催化剂具有良好的稳定性。

Different transition metals (Mn³⁺, Ni³⁺and Fe³⁺) are used to replace Co at A position in Co₃O₄ to synthesize MCo₂O₄ nanosheet monolithic catalyst (MCo-NS), and their performance in deeply oxidizing volatile organic compounds (VOCs) is evaluated through using toluene as a model.Through hydrogen temperature-programmed reduction (H₂-TPR), X-ray photoelectron spectroscopy (XPS) and performance tests, it is shown that the substitution of Mn and Ni for Co at the position A in Co₃O₄ is helpful to improve the redox ability of the catalyst, and also conducive to the generation of surface oxygen vacancies and the activation of surface adsorbed oxygen, thus contributing to the catalyst with a higher catalytic performance for toluene oxidation than Co-NS, the reference catalyst.Among them, MnCo₂O₄ nano sheet catalyst shows the highest catalytic activity for toluene oxidation due to its high redox ability and rich surface adsorbed oxygen species.Its T₉₀ is 254℃, superior to that of NiCo-NS and FeCo-NS.Meanwhile, MnCo₂O₄ nanosheet catalyst presents good stability.

肖婕妤(1998-),女,硕士生,研究方向为环境催化,202012232014491@gs.zzu.edu.cn。