论文部分内容阅读
用ＥＳＲ、ＮＯＴＰＤ和１８Ｏ２同位素交换的方法研究了丙烷氧化脱氢催化剂正钒酸钇ＹＶＯ４的活性位。ＥＳＲ和ＮＯＴＰＤ结果证明催化剂中存在Ｖ４＋离子。１８Ｏ２同位素交换结果表明，Ｏ２是在Ｖ４＋及氧空位上活化的。氧的活化是催化剂在丙烷氧化脱氢中具有良好活性的原因。
The active sites of yttrium orthovanadate YVO4, a propane oxidative dehydrogenation catalyst, were studied by means of ESR, NO-TPD and 18O2-isotope exchange. The ESR and NO-TPD results demonstrated the presence of V4 + ions in the catalyst. The results of 18O2-isotope exchange show that O2 is activated at V4 + and oxygen vacancies. The activation of oxygen is the reason that the catalyst has a good activity in the oxidative dehydrogenation of propane.