Pd/N-doped carbon dots@dendritic mesoporous silica nanospheres:A highly efficient catalyst for the hydrogenation of 4-nitrophenol  

作　　者：Weiruo Liu Yanbin Zhu Jiwei Wang Haisong Feng Yunpu Zhai Wei Li Dongyuan Zhao 

机构地区：[1]College of Chemistry,Zhengzhou University,100 Kexue Avenue,Zhengzhou 450001,China [2]Department of Chemistry,Laboratory of Advanced Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,and State Key Laboratory of Molecular Engineering of Polymers,Fudan University,Shanghai 200433,China [3]State Key Laboratory of Chemical Resource Engineering,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Nano Research》2024年第9期7967-7974,共8页纳米研究（英文版）

基　　金：supported by the National Key R&D Program of China(No.2022YFA1503501);the National Natural Science Foundation of China(Nos.22088101 and U21A20329);Program of Shanghai Academic Research Leader(No.21XD1420800);Shanghai Pilot Program for Basic Research-FuDan University 21TQ1400100(21TQ008);“Shuguang Program”supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission(No.22SG02).

摘　　要：Highly dispersed Pd/N-doped carbon dots(Pd/NCDs)were successfully immobilized in the mesoporous channels of amino-functionalized dendritic mesoporous silica nanospheres(NMS).The synthesized Pd/NCDs@NMS catalyst exhibits outstanding performance in the catalytic reduction of 4-nitrophenol(4-NP),achieving a turnover frequency of 1461.8 mol·molPd^(-1)·h^(-1),with the conversion rate remaining above 80%after 11 cycles.Experiments and density functional theory calculations reveal that the NCDs significantly affect the electronic structure of Pd nanoparticles,leading to changes in the energy barriers for the adsorption of 4-NP at the Pd sites and the conversion of 4-NP reaction intermediates,which is a key factor contributing to the catalytic performance.This study offers a new strategy for synthesizing carbon-dot-modified metal-based catalysts.

关 键 词：palladium nanoparticles nitrogen-doped carbon dots dendritic mesoporous silica catalytic hydrogenation 4-nitrophenol reduction 

分 类 号：O64[理学—物理化学]