Spherical polyelectrolyte brushes as carriers for platinum nanoparticles in heterogeneous hydrogenation reactions
作者： G SHARMA , Y MEI , Y LU , M BALLAUFF , T IRRGANG
DOI: 10.1016/J.JCAT.2006.11.016
关键词: Transmission electron microscopy 、 Platinum 、 Chemistry 、 Catalysis 、 Polyelectrolyte 、 Chemical engineering 、 Nanoparticle 、 Inorganic chemistry 、 Platinum nanoparticles 、 Transition metal 、 Colloid
摘要: Platinum nanoparticles generated on the surface of spherical polyelectrolyte brush particles were investigated with regard to their catalytic behavior in hydrogenation reactions. No surface-active agent was needed stabilize platinum particles. Transmission electron microscopy demonstrated that Pt are well defined a diameter approximately 2 nm. The activity immobilized particles, as colloidal stability carrier preserved over many runs. These data demonstrate generation and immobilization bare metallic brushes generate very robust, water-based catalyst system. Pseudofirst-order kinetics respect aldehyde observed.
elsevier.com
sci-hub.se 参考文章(18)
S.D. Jackson, G.D. McLellan, G. Webb, L. Conyers, M.B.T. Keegan, S. Mather, S. Simpson, P.B. Wells, D.A. Whan, R. Whyman, Supported metal catalysts: Preparation, characterization, and function. V. Activities and selectivities of platinum catalysts in the reactions of cyclopropane, ethene, 1,3-butadiene, and 2-butyne with dihydrogen Journal of Catalysis. ,vol. 162, pp. 10- 19 ,(1996) , 10.1006/JCAT.1996.0255
Patricia Concepción, Avelino Corma, Joaquín Silvestre-Albero, Victor Franco, Jean Y. Chane-Ching, Chemoselective Hydrogenation Catalysts: Pt on Mesostructured CeO2 Nanoparticles Embedded within Ultrathin Layers of SiO2 Binder Journal of the American Chemical Society. ,vol. 126, pp. 5523- 5532 ,(2004) , 10.1021/JA031768X
Narayan Pradhan, Anjali Pal, Tarasankar Pal, Silver nanoparticle catalyzed reduction of aromatic nitro compounds Colloids and Surfaces A: Physicochemical and Engineering Aspects. ,vol. 196, pp. 247- 257 ,(2002) , 10.1016/S0927-7757(01)01040-8
Yu Mei, Geeta Sharma, Yan Lu, Matthias Ballauff, Markus Drechsler, Thorsten Irrgang, Rhett Kempe, High catalytic activity of platinum nanoparticles immobilized on spherical polyelectrolyte brushes. Langmuir. ,vol. 21, pp. 12229- 12234 ,(2005) , 10.1021/LA052120W
Kunio Esumi, Ryoko Isono, Tomokazu Yoshimura, Preparation of PAMAM− and PPI−Metal (Silver, Platinum, and Palladium) Nanocomposites and Their Catalytic Activities for Reduction of 4-Nitrophenol Langmuir. ,vol. 20, pp. 237- 243 ,(2004) , 10.1021/LA035440T
X. Guo, M. Ballauff, Spatial Dimensions of Colloidal Polyelectrolyte Brushes As Determined by Dynamic Light Scattering Langmuir. ,vol. 16, pp. 8719- 8726 ,(2000) , 10.1021/LA000319X
L. N. Lewis, Chemical catalysis by colloids and clusters Chemical Reviews. ,vol. 93, pp. 2693- 2730 ,(1993) , 10.1021/CR00024A006
Sujit Kumar Ghosh, Madhuri Mandal, Subrata Kundu, Sudip Nath, Tarasankar Pal, Bimetallic Pt–Ni nanoparticles can catalyze reduction of aromatic nitro compounds by sodium borohydride in aqueous solution Applied Catalysis A-general. ,vol. 268, pp. 61- 66 ,(2004) , 10.1016/J.APCATA.2004.03.017
X. Guo, A. Weiss, M. Ballauff, Synthesis of Spherical Polyelectrolyte Brushes by Photoemulsion Polymerization Macromolecules. ,vol. 32, pp. 6043- 6046 ,(1999) , 10.1021/MA990609O
Mingqi Zhao, Richard M. Crooks, Homogeneous Hydrogenation Catalysis with Monodisperse, Dendrimer-Encapsulated Pd and Pt Nanoparticles Angewandte Chemie International Edition. ,vol. 38, pp. 364- 366 ,(1999) , 10.1002/(SICI)1521-3773(19990201)38:3<364::AID-ANIE364>3.0.CO;2-L