As demonstrated in the 1H MAS NMR experiment, the number of B acid sites per unit cell was 1 12 on the Mo/HZSM-5 catalyst prepared using unmodified zeolite as support, but it was only 0 88 on the Mo catalyst supported on modified HZSM-5 zeolite.

• 未经改性的Mo/HZSM 5催化剂表面 ；平均每个晶胞中有 1 12个B酸位 ；而改性的Mo/HZSM 5催化剂表面 ；平均每个晶胞中仅有 0 88个B酸位 .