Single-Atom Alloy Pd鈥揂g Catalyst for Selective Hydrogenation of Acrolein

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• 作者：Payoli Aich ; Haojuan Wei ; Bridget Basan ; A. Jeremy Kropf ; Neil M. Schweitzer ; Christopher L. Marshall ; Jeffrey T. Miller ; Randall Meyer
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 13, 2015
• 年：2015
• 卷：119
• 期：32
• 页码：18140-18148
• 全文大小：431K
• ISSN：1932-7455

文摘

Pd鈥揂g alloy catalysts with very dilute amounts of Pd were synthesized. EXAFS results demonstrated that when the concentration of Pd was as low as 0.01 wt %, Pd was completely dispersed as isolated single atoms in Ag nanoparticles. The activity for the hydrogenation of acrolein was improved by the presence of these isolated Pd atoms due to the creation of sites with lower activation energy for H₂ dissociation. In addition, for the same particle size, the 0.01% Pd/8% Ag alloy nanoparticles exhibited higher selectivity than their monometallic counterparts, suggesting that the Pd atom may act as a site for the favorable bonding of the acrolein molecule for facile hydrogenation of the aldehyde functionality.