Hydrogenation of o-Chloronitrobenzene by Platinum Nanoparticles on Activated Carbon

✍ Scribed by Jianzhong MAO; Xinhuan YAN; Huizi GU; Lingchao JIANG

• Book ID: 104452822
• Publisher: Elsevier Science
• Year: 2009
• Weight: 752 KB
• Volume: 30
• Category: Article
• ISSN: 1872-2067
• DOI: 10.1016/s1872-2067(08)60095-9

✦ Synopsis

The assembled Pt catalyst was prepared using activated carbon as support to capture "unprotected" Pt nanoparticles obtained from the decomposition of Pt 2 (dba) 3 (dba = dibenzene acetone). Transmission electron microscopy showed that the size of the Pt nanoparticles depended on the decomposition pressure. The catalytic activity was evaluated by the liquid-phase hydrogenation of o-chloronitrobenzene. The Pt/C catalyst exhibited high conversion and selectivity. When the Pt nanoparticles were prepared at 2.0 MPa of hydrogen pressure and 30 o C, the average size of the Pt nanoparticles was 2.8 nm with 0.5% Pt loading. Under the hydrogenation conditions of 60 o C and 1.0 MPa hydrogen pressure, the dehalogenation rate was less than 1.67% while the TOF was 39.8 s 1 .