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Ag‐Enriched Ag‐Pd Bimetallic Nanoframes and Their Catalytic Properties
Author(s) -
Li Jumei,
Sun Xiaojun,
Qin Dong
Publication year - 2016
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201600080
Subject(s) - bimetallic strip , ascorbic acid , catalysis , aqueous solution , materials science , nanocrystal , bimetal , chemical engineering , nuclear chemistry , inorganic chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , food science , engineering
Abstract We report a facile synthesis of Ag‐enriched Ag‐Pd bimetallic nanoframes with ridges as thin as 1.7 nm. The synthesis involves co‐titration of aqueous AgNO 3 and Na 2 PdCl 4 solutions into an aqueous suspension of Ag nanocubes at room temperature in the presence of ascorbic acid and poly(vinyl pyrrolidone). The Ag and Pd atoms derived from the co‐reduction by ascorbic acid are co‐deposited on the edge and corner sites of Ag nanocubes for the generation of Ag@Ag‐Pd core–frame nanocubes. When subjected to H 2 O 2 etching, the Ag cores are selectively removed to generate Ag‐Pd bimetallic nanoframes made of ultrathin ridges enriched in Ag. In comparison to both the Ag nanocubes and Ag@Ag‐Pd core‐frame nanocubes, the Ag‐Pd bimetallic nanoframes exhibit markedly enhanced activity in catalyzing the reduction of 4‐nitrophenol by NaBH 4 .