کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1650927 | 1007616 | 2008 | 4 صفحه PDF | دانلود رایگان |

Ce-doped Pd–B amorphous alloy catalysts were prepared by chemical reduction of mixed PdCl2 and Ce(NO3)3 with KBH4. During liquid-phase selective hydrogenation of phenol to cyclohexanone, the as-prepared Pd–Ce–B catalysts exhibited much higher activity, better selectivity and excellent durability than the undoped Pd–B. Based on various characterizations, the promoting effect of Ce-dopant on the catalytic properties can be addressed as follows: (1) stabilizing the amorphous structure of Pd–B alloy and enhancing the dispersion degree of Pd active sites; (2) increasing the electron density of Pd, which could enhance hydrogenation activity and improve catalytic durability; (3) increasing the surface basicity, which facilitated the non-planar adsorption of phenol on catalyst surface, leading to higher cyclohexanone selectivity.
Journal: Materials Letters - Volume 62, Issue 2, 31 January 2008, Pages 297–300