Facile preparation of supported noble metal nanoparticle catalysts with the aid of templating surfactants in mesostructured materials

• Published in: Journal of catalysis Vol. 275; no. 1; pp. 140 - 148
• Main Authors: Wang, Hu, Wang, Jin-Gui, Shen, Zhu-Rui, Liu, Yu-Ping, Ding, Da-Tong, Chen, Tie-Hong
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 30.09.2010; Elsevier; Elsevier BV
• Subjects: Aerobic selective oxidation; Allyl alcohol hydrogenation; Catalysis; Catalysts; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Hybrid mesostructured materials; Materials science; Metals; Nanoparticles; Palladium; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Porous materials; Quaternary ammonium surfactant; Surfactants; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Hybrid mesostructured materials; Palladium; Aerobic selective oxidation; Allyl alcohol hydrogenation; Quaternary ammonium surfactant; Modification; Support; Nanoparticle; Hybrid material; Cationic surfactant; Alcohol; Surfactant; Ionic surfactant; Hydrogenation; Porous material; Precursor; Supported catalyst; Template; Synthesis; Energy; Noble metal; Extraction; Oxidation; Platinoid; Transition metal; Benzyl alcohol; Mesoporosity; Quaternary ammonium compound; Heterogeneous catalysis; Preparation; High frequency; Catalyst
• ISSN: 0021-9517; 1090-2694
• DOI: 10.1016/j.jcat.2010.07.025

A facile method was reported to prepare as-synthesized mesostructured material supported Pd catalysts which exhibited high and stable activity in hydrogenation of allyl alcohol. Quaternary ammonium surfactants were generally used as templates in the synthesis of mesoporous materials, and the surfactants were removed by extraction or calcination to give the space of mesopores. Here with the cetyltrimethylammonium bromide templated mesostructured materials, we directly utilized the surfactants as capturing and stabilizing agents to prepare supported noble metal nanoparticle catalysts. The Pd-supported catalysts exhibited high and stable activity in hydrogenation of allyl alcohol (with a remarkably high turnover frequency of 5676 h −1) and aerobic oxidation of benzyl alcohol. During the recycle use of the catalyst, though surfactants were gradually leached into the reaction medium, the amount of Pd in the catalyst remained constant within experimental error. It is facile and energy-saving to use directly the as-synthesized mesostructured materials as support for noble metal nanoparticles without further calcination or further modification treatment. This method is versatile to prepare other noble metal (such as Au and Pt) supported catalysts by altering the metal precursors.