Semihydrogenation of Phenylacetylene Catalyzed by Palladium Nanoparticles Supported on Carbon Materials

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• 作者：Sonia Dom&iacute ; nguez-Dom&iacute ; nguez ; Á ; ngel Berenguer-Murcia ; Bhabendra K. Pradhan ; Á ; ngel Linares-Solano ; Diego Cazorla-Amoró ; s
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：March 13, 2008
• 年：2008
• 卷：112
• 期：10
• 页码：3827 - 3834
• 全文大小：1203K
• 年卷期：v.112,no.10(March 13, 2008)
• ISSN：1932-7455

文摘

Palladium catalysts were prepared supporting palladium colloids on three types of carbon supports: multiwallcarbon nanotubes (NTs), carbon black (CB), and an activated carbon (AC). These catalysts were tested in areaction of great industrial interest such as the partial hydrogenation of phenylacetylene. The liquid-phasehydrogenation reaction of phenylacetylene was performed under very mild conditions (323 K, flow of H₂ of30 mL/min, 1 bar of pressure). The catalytic activities are very close to that of the homogeneous catalyst. Atotal conversion was achieved in all the Pd/C catalysts and also with very high selectivity toward styrene(higher than 95%). The carbon support produces differences between the catalysts. The AC provokes a Pdparticle agglomeration, and the catalyst has the lowest activity and selectivity. The highest selectivity is obtainedfor the Pd/NT sample. The ease of manipulation of the Pd/NT catalysts is noteworthy, facilitating its recoveryby filtration and its subsequent reutilization. It was found that neither the catalytic activity nor the selectivitydecreased appreciably throughout five consecutive cycles of the Pd/NT sample. Furthermore, no Pd leachingof the samples occurred during the catalytic reactions.