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Polymer‐Protected and Au‐Containing Bi‐ and Trimetallic Nanoparticles as Novel Catalysts for Glucose Oxidation
Author(s) -
Toshima Naoki,
Zhang Haijun
Publication year - 2012
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201100110
Subject(s) - bimetallic strip , catalysis , polymer , nanoparticle , gluconic acid , metal , materials science , reducing agent , chemical engineering , polymer chemistry , chemistry , inorganic chemistry , nanotechnology , organic chemistry , engineering
Polymer‐protected metal nanoparticles (NPs) are recognized as a type of complex between a polymer and metal NPs, since the metal NPs are stabilized by coordination to the polymer. Thus, they can work as an effective catalyst in a dispersed state due to their high surface area‐to‐volume ratio and high stability by protection with poly(N‐vinyl‐2‐pyrrolidone) (PVP). In this study, colloidal dispersions of PVP‐protected and Au‐containing bi‐ and trimetallic NPs were prepared and applied to the catalyst for the aerobic oxidation of glucose into gluconic acid in an alkaline solution. The AuAg and AuPt bimetallic NPs were more active than the Au NPs although the Ag and Pt NPs were less active than the Au NPs. The AuAgPt (Au/Ag/Pt = 7/2/1) trimetallic NPs were the most active catalyst for the same reaction. The high activity can be explained by electronic charge transfer from the Ag or Pt to the Au.