We report a thermally stable multilayered two‐dimensional vanadium carbide (V₂CT_x) MXenes catalyst for the direct conversion of methane (CH₄) into benzene (C₆H₆). The multilayered carbide structure shows state‐of‐the‐art CH₄ conversion 11.8 % with a C₆H₆ formation rate of 1.9 mmol g_cat⁻¹h⁻¹ (4.84 % C₆H₆ yield) at 700 °C, which is comparable to the benchmark Mo/ZSM‐5 catalyst. The structure‐activity relationship was explored by numerous characterization techniques including in‐situ/operando Raman‐MS, ex‐situ X‐ray diffraction (XRD), scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), and ammonia temperature programmed desorption (NH₃‐TPD). This work provides a new platform to design and explore multilayered two‐dimensional catalysts demonstrating confinement effect to convert CH₄ into *C₂H₃ intermediates which further oligomerize inside multilayered structures producing C₆H₆ as the final product.

中文翻译：

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用于甲烷脱氢芳构化的多层二维V2CTx MXene

我们报告了一种热稳定的多层二维碳化钒（V ₂ CT _x）MXenes催化剂，可将甲烷（CH ₄）直接转化为苯（C ₆ H ₆）。多层碳化物结构在700°C下显示出最新的CH ₄转化率11.8％，C ₆ H ₆形成速率为1.9 mmol g _cat ^-1 h ^-1（4.84％C ₆ H ₆产率）。与基准Mo / ZSM-5催化剂相当。通过多种表征技术（包括原位/操作数）探索了结构-活性关系拉曼质谱，异位X射线衍射（XRD），扫描电子显微镜（SEM），X射线光电子能谱（XPS）和程序设定的氨温度解吸（NH ₃ -TPD）。这项工作为设计和探索多层二维催化剂提供了一个新的平台，展示了将CH ₄转化为* C ₂ H ₃中间体的局限性作用，该中间体进一步在多层结构内部低聚，最终生成C ₆ H ₆。