By D. Astruc
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Extra info for Nanoparticles and Catalysts [Vol 1]
Sample text
4 Schematic illustration of the synthesis of metal NPs derived from polysilane shell cross-linked micelle templates (Reprinted with permission from Ref. [14f]; Sakurai group, Chem. Lett. 2003, 32, 980). Au-cored PdNPs are more active in catalysis than simple PVP-stabilized PdNPs. Thus, the Au core enhances the catalytic properties of PdNPs at the PdNP surface [5f,g]. Conversely, design strategies can lead to the opposite core–shell structure (Pd core, Au shell), and specific catalytic properties were obtained for methylacrylate hydrogenation [16].
6 times higher than PdNPs that did not contain Ag. 9 Oxide Supports for NP Catalysts activity was explicable by the large fraction of the surface-exposed Pd atoms [37c]. Polyelectrolyte multilayers serve as supports for PdNP-catalyzed selective hydrogenation of allylic alcohols, isomerization being suppressed. Thus, polyacrylic acid and polyethyleneimine-Pd(II) complex were alternately adsorbed on 150-mm diameter alumina particles, and subsequent reduction of Pd(II) to PdNPs was carried out using NaBH4 [14d].
18f]; Crooks, Acc. Chem. Res. 2001, 34, 181). Schematic diagram for the preparation of dendrimer-encapsulated bimetallic NPs (Reprinted with permission from Ref. [23]; Rhee group, J. Mol. Catal. A: Chem. 2003, 206, 291). [18a] and reduction [18b] catalysis could be achieved using such dendrimerencapsulated NPs. Crooks’ work on homogeneous catalysis using DENs is also detailed in the first part of Chapter 4 by Bert Chandler and John D. Gilbertson that is also devoted to heterogeneous catalysis using DEN precursors [20] (vide infra).
