N-doped carbon-based materials have been regarded as promising alternative metal-free catalysts for the production of vinyl chloride monomer. In this work, N-doped carbon-based catalysts were synthesized via a melamine/formaldehyde/ polyvinyl alcohol (PVA) coating-pyrolysis method, and the performances of the resultant catalysts (N@CBC-FE) were investigated and compared with those of the control samples. The optimal N@CBC-FE catalyst presented the highest acetylene conversion of 75 % at 220 °C and an acetylene gas hourly space velocity of 50 h⁻¹ in 120 h. N₂ sorption, Raman spectroscopy, attenuated total Reflectance-Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and temperature-programmed desorption analysis results revealed that the excellent performance of N@CBC-FE was mainly attributed to the unique nitrogen intercalation pathway generated by the polymeric network coating, which was produced by the reactions among formaldehyde, PVA and melamine. Moreover, the abundant mesopores of N@CBC-FE facilitated the transfer of the reactants and retarded the deactivation process. This work is expected to provide new insights for the preparation of N-doped activated carbon-based catalysts.

N掺杂的碳基材料被认为是生产氯乙烯单体的有前途的无金属替代催化剂。在这项工作中，通过三聚氰胺/甲醛/聚乙烯醇（PVA）涂层热解法合成了N掺杂的碳基催化剂，并研究了所得催化剂（N @ CBC-FE）的性能并与之比较。对照样品。最佳的N @ CBC-FE催化剂在220°C时乙炔转化率最高，为75％，在120 h中乙炔气体的时空速度为50 h ^-1。N ₂吸附，拉曼光谱，衰减全反射傅里叶变换红外光谱，X射线光电子能谱和程序升温脱附分析结果表明，N @ CBC-FE的优异性能主要归因于聚合物产生的独特的氮嵌入途径网络涂层，它是由甲醛，PVA和三聚氰胺之间的反应产生的。此外，N @ CBC-FE的丰富的中孔促进了反应物的转移并延缓了失活过程。预期这项工作将为制备N掺杂活性炭基催化剂提供新的见解。