Facile Synthesis of AuPt Alloy Nanoparticles in Polyelectrolyte\nMultilayers with Enhanced Catalytic Activity for Reduction of 4‑Nitrophenol
Chengcan Chu (1700551)Zhaohui Su (132506)
Abstract
In this work, bimetallic AuPt alloy\nnanoparticles were synthesized <i>in situ</i> in polyelectrolyte\nmultilayers (PEMs) via an ion-exchange\nand coreduction process, in which the PEM support also served to suppress\nthe Au–Pt phase separation, and thus enabled formation of AuPt\nalloy nanoparticles over a wide composition range. The PEM supported\nAuPt alloy nanoparticles exhibited higher catalytic activity than\nAu and Pt monometallic ones for the reduction of 4-nitrophenol by\nNaBH<sub>4</sub>, showing synergistic effects between Au and Pt. This\nwork provides a facile approach to <i>in situ</i> synthesis\nof polymer supported bimetallic nanoparticles of tailored composition\nfor optimum performance in catalysis and other applications.
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