Enhanced Catalytic Hydrogenation Activity and Selectivity of Pt-MxOy/Al2O3 (M = Ni, Fe, Co) Heteroaggregate Catalysts by in Situ Transf

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• 作者：Xiangdong Wang ; Hongbo Yu ; Dayin Hua ; Shenghu Zhou
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：April 11, 2013
• 年：2013
• 卷：117
• 期：14
• 页码：7294-7302
• 全文大小：568K
• 年卷期：v.117,no.14(April 11, 2013)
• ISSN：1932-7455

文摘

PtM (M = Ni, Fe, Co) alloy nanoparticles were synthesized by a liquid phase reduction method employing butyllithium as a reducing agent. The alumina-supported PtM materials were then used as precursors to obtain the Pt-M_xO_y/Al₂O₃ catalysts through calcination. The influence of synthesis conditions of PtM alloy nanoparticles and the catalytic performance of the Pt-M_xO_y/Al₂O₃ catalysts for p-chloronitrobenzene hydrogenation reaction were investigated. The relevant characterizations such as XRD, XPS, and TEM were conducted for PtM alloy nanoparticles and Pt-M_xO_y/Al₂O₃ catalysts, and the result showed that the PtM nanoparticles are uniform alloy. Moreover, compared to PtM alloy nanoparticles, the Pt particle size of Pt-M_xO_y/Al₂O₃ using PtM alloy nanoparticle precursors did not increase by calcination, indicating good thermal stability. The catalytic activities of Pt-M_xO_y/Al₂O₃ for p-chloronitrobenzene hydrogenation reaction were significantly higher than that of control Pt/Al₂O₃ catalysts due to its strong Pt-M_xO_y interaction.