The presence of nitrogen and oxygen sites was shown to have a direct impact on the acid-base properties of Mo₂N. The gas phase reaction of 2-methyl-3-butyn-2-ol (MBOH), temperature programmed desorption (TPD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the Mo₂N catalyst. The acid-base character of Mo₂N was impacted by synthesis and surface pretreatment methods prior to analysis. The basic character of passivated Mo₂N increased after the following pretreatment: degassing in helium < reduction in hydrogen < in-situ unpassivated < renitridation. The CO₂ desorbed during TPD increased from 0 to 128.8 × 10¹⁶ molecules/m² for the degassed and renitrided Mo₂N, while NH₃ desorption decreased from 134 to 13.2 × 10¹⁶ molecules/m², respectively. Acid-base character was linked to N/O atomic ratio using XPS. The renitrided Mo₂N surface exhibited the highest N/O atomic ratio, base site density, highest acetylene selectivity, while displaying the lowest acid site density and activity.

已显示氮和氧位的存在直接影响Mo ₂ N的酸碱性质。2-甲基-3-丁炔-2-醇（MBOH）的气相反应，程序升温脱附（TPD） ），并使用X射线光电子能谱（XPS）表征Mo ₂ N催化剂。在分析之前，Mo ₂ N的酸碱特性受到合成和表面预处理方法的影响。经过以下预处理，钝化的Mo ₂ N的基本特征增加：氦气脱气<氢的还原<原位未钝化<再氮化。TPD期间解吸的CO ₂从0增加到128.8×10 ¹⁶分子/ m ²对于脱气和再硝化的Mo ₂ N，NH _3的解吸分别从134降低到13.2×10 ¹⁶分子/ m ²。使用XPS将酸碱特性与N / O原子比相关联。再氮化的Mo ₂ N表面表现出最高的N / O原子比，碱位密度，最高的乙炔选择性，同时表现出最低的酸位密度和活性。