Synthesis of Pd/α-Fe2O3 nanocomposites for catalytic CO oxidation

✍ Scribed by X.C. Jiang; A.B. Yu

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 637 KB
• Volume: 209
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2008.10.022

✦ Synopsis

Iron oxide and metal doped iron oxide nanocomposites have found attractive and versatile applications in many research areas such as catalysts, sensors, and biomedicine. This work reports a surfactant-free hydrolysis approach for the synthesis of hematite (␣-Fe 2 O 3 ) and Pd doped ␣-Fe 2 O 3 nanoparticles with low-temperature catalytic activity. By this method, iron oxide rod-like nanoparticles were achieved by hydrolysis of ferric chloride salt with dilute HCl at a temperature of 100 • C. The Pd/iron oxide nanocomposites were obtained by adding citric acid into a mixture of iron oxide nanoparticles and palladium precursor (Pd(CH 3 CN) 2 Cl 2 ) under a reflux heating at 90 • C for 2 h. This method is featured as no use of any surfactants and templates, and no requirement of high-temperature thermal decomposition that are usually required for shape/size control in polar or nonpolar solvents. More importantly, it was found that the Pd/␣-Fe 2 O 3 nanocomposites exhibited high low-temperature catalytic activity in carbon monoxide (CO) oxidation.