Article ID Journal Published Year Pages File Type
1650927 Materials Letters 2008 4 Pages PDF
Abstract

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.

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Physical Sciences and Engineering Materials Science Nanotechnology
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