材料科学
电催化剂
三元运算
合金
原电池
纳米结构
纳米技术
抗坏血酸
纳米晶
催化作用
化学工程
冶金
电极
电化学
物理化学
有机化学
工程类
化学
计算机科学
程序设计语言
食品科学
作者
Yonghyeon Kim,Young-Wook Lee,Seung‐Hoon Lee,Jintaek Gong,Hee-Seung Lee,Sang Woo Han
标识
DOI:10.1021/acsami.1c13171
摘要
The rational design and synthesis of multimetallic hollow nanostructures (HNSs) have been attracting great attention due to their structural and compositional advantages for application in electrocatalysis. Herein, the one-pot synthesis of Pd–Pt–Ag ternary alloy HNSs with controllable morphologies through a self-templating approach without any pre-synthesized templates is reported. Simultaneous reduction of multiple metal precursors by ascorbic acid in the presence of cetyltrimethylammonium chloride (CTAC) yielded initially metastable Pd–Ag nanocrystals, which can act as a self-template, and subsequent galvanic replacement and reduction led to the formation of final Pd–Pt–Ag HNSs. The size and hollowness (the ratio of inner cavity diameter to outer diameter) of the HNSs could be tuned through control over the concentration of CTAC. This can be attributed to the manipulated reduction kinetics of multiple metal precursors with the change in the CTAC concentration. The prepared Pd–Pt–Ag HNSs exhibited improved catalytic performance for ethanol electro-oxidation due to their large active surface areas and ternary alloy composition.
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