Facile Synthesis of Ru Nanoboxes with a Hexagonal Close-Packed Structure by Templating with Ag Nanocubes and Their Catalytic Properties

被引：0
|
作者：
Yu, Hansong [1 ]
Ding, Yong [1 ]
Wang, Peng [1 ,2 ]
Nguyen, Quynh [3 ]
Xia, Younan [3 ]
Qin, Dong [1 ]
机构：
[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
[2] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255000, Shandong, Peoples R China
[3] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2023年 / 29卷 / 68期
基金：
美国国家科学基金会;
关键词：
nanocrystals; nanoboxes; ruthenium; silver; catalysis; SILVER NANOPARTICLES; BIMETALLIC NANOPARTICLES; RUTHENIUM NANOPARTICLES; NANOCRYSTALS; ELECTROCATALYSTS; NANOCATALYSTS; NANOCAGES; ALCOHOLS; AMMONIA; METAL;
D O I：
10.1002/chem.202302603
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Noble-metal nanoboxes offer an attractive form of nanomaterials for catalytic applications owing to their open structure and highly efficient use of atoms. Herein, we report the facile synthesis of Ag-Ru core-shell nanocubes and then Ru nanoboxes with a hexagonal close-packed (hcp) structure, as well as evaluation of their catalytic activity toward a model hydrogenation reaction. By adding a solution of Ru(acac)3 in ethylene glycol (EG) dropwise to a suspension of silver nanocubes in EG at 170 degrees C, Ru atoms are generated and deposited onto the entire surface of a nanocube. As the volume of the RuIII precursor is increased, Ru atoms are also produced through a galvanic replacement reaction, generating Ag-Ru nanocubes with a hollow interior. The released Ag+ ions are then reduced by EG and deposited back onto the nanocubes. By selectively etching away the remaining Ag with aqueous HNO3, the as-obtained Ag-Ru nanocubes are transformed into Ru nanoboxes, whose walls are characterized by an hcp structure and an ultrathin thickness of a few nanometers. Finally, we evaluated the catalytic properties of the Ru nanoboxes with two different wall thicknesses by using a model hydrogenation reaction; both samples showed excellent performance. Boxing clever: We report a facile synthesis of Ag-Ru core-shell nanocubes and then Ru nanoboxes by templating with Ag nanocubes. The nanoboxes show high catalytic activity toward the hydrogenation of 4-nitrophenol by NaBH4.image
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页数：7
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