Kinetically controlled synthesis of atomically precise Ag nanoclusters for the catalytic reduction of 4-nitrophenol  

作　　者：Xian-hu Liu Fei-hong Wang Cong-ying Shao Gang-feng Du Bing-qing Yao 

机构地区：[1]Department of Chemistry,Huaibei Normal University,Huaibei 235000,China [2]Henan Key Laboratory of High-temperature Structural and Functional Materials,National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,Henan University of Science and Technology,Luoyang 471003,China [3]Department of Public Teaching,Nanyang Medical College,Nanyang 473061,China [4]School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第10期1716-1725,共10页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Huaibei Normal University Doctoral Research Start-up Funding(No.15601012);the Natural Science Foundation of Anhui Provincial Department of Education(No.KJ2019A0598);the Excellent Young Talents Fund Program of Higher Education Institutions of Anhui Province,China(No.gxyq2019168);the Team of Superior Discipline of Chemistry(No.GFXK202108).

摘　　要：Synthesizing atomically precise Ag nanoclusters(NCs),which is essential for the general development of NCs,is quite challenging.In this study,we report the synthesis of high-purity atomically precise Ag NCs via a kinetically controlled strategy.The Ag NCs were prepared using a mild reducing agent via a one-pot method.The as-prepared Ag NCs were confirmed to be Ag_(49)(D-pen)_(24)(D-pen:D-penicillamine)on the basis of their matrix-assisted laser desorption ionization time-of-flight mass spectrometric and thermogravimetric characteristics.The interfacial structures of the Ag NCs were illustrated by proton nuclear magnetic resonance and Fourier-transform infrared spectroscopy.The Ag NCs were supported on activated carbon(AC)to form Ag NCs/AC,which displayed excellent activity for the catalytic reduction of 4-nitrophenol with a kinetic reaction rate constant k of 0.21 min^(-1).Such a high k value indicates that the composite could outperform several previously reported catalysts.Moreover,the catalytic activity of Ag NCs/AC remained nearly constant after six times of recycle,which suggests its excellent stability.

关 键 词：Ag nanoclusters D-PENICILLAMINE sodium cyanoborohydride CATALYSIS 4-NITROPHENOL 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ426[化学工程]