【摘要】 通过射频等离子体改性体相Mo₂N制备了MoO₂-Mo₂N复合催化剂,并考察了其在合成气制低碳醇反应中的催化性能。利用XRD、TEM、XPS、CO-TPD对改性前后的催化剂进行了表征,结果发现在等离子体处理过程中,体相Mo₂N可与表面氧原子发生结构重组,产生了更多的活性位点,且生成的MoO₂与Mo₂N间存在一定的相互作用。所制得的MoO₂-Mo₂N复合催化剂的催化性能较体相Mo₂N有所提升,在350℃反应温度下,CO转化率达到32.7%,醇选择性达到34.03%,醇类时空产率达到79.5mg/（g·h）。更多还原

【Abstract】 MoO₂-Mo₂N composite catalyst was prepared by modifying bulk phase Mo₂N via RF plasma technique,and its catalytic performance in higher alcohols synthesis from syngas was investigated.The catalysts were characterized by XRD,TEM,XPS and CO-TPD.It was found that during the plasma treatment,the bulk phase Mo₂N can recombine with the surface oxygen atoms,which resulted in more active sites on the catalyst.Also there is certain interaction between MoO₂and Mo₂N.The catalytic performance of the prepared MoO₂-Mo₂N composite catalyst is improved compared with that of the bulk phase Mo₂N.At the reaction temperature of 350℃,the CO conversion rate,the alcohol selectivity,and the alcohol space-time yield reach32.7%,34.03%,and 79.5mg/（g·h）respectively.更多还原