Stable Au nanoparticles confined in boron nitride shells for optimizing oxidative desulfurization  

作　　者：Linjie Lu Jing He Peiwen Wu Yang Sun Mingqing Hua Peng Cui Wenshuai Zhu Huaming Li Zhichang Liu Chunming Xu 

机构地区：[1]School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China [2]College of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(Beijing),Beijing 102249,China

出　　处：《Nano Research》2023年第10期12076-12083,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22178154 and 22008094);Science Foundation of China University of Petroleum(Beijing)(No.ZX20220044);the Natural Science Foundation of Jiangsu Province(No.BK20190852);the Natural Science Foundation for Jiangsu Colleges and Universities(No.19KJB530005).

摘　　要：Supported gold(Au)nanocatalysts have long played an important role in numerous heterogeneous catalysis.However,the dominant difficulty of poor thermodynamic stability hampers its practical application.Herein,a core–shell structured Au nanocatalyst with Au nanoparticles(NPs)confined in boron nitride(BN)shells is proposed for enhanced thermodynamic stability.The two-dimensional porous structure of BN not only functions as a physical separator for the sintering resistance of Au NPs,but also provides a microchannel for catalytic reaction substrates.Besides,owing to the confinement effect,a strengthened interaction between well-designed Au NPs and the BN can be expected,which further boosts the stability and catalytic activity.Detailed experiments show that a proper BN shell thickness is important to maintain the balance between the sintering resistance and catalytic activity.A significantly boosted performance of 97.2%conversion in oxidative desulfurization(ODS)was obtained with a proper number of BN coating layers,outperforming the one with a thicker BN shell.Moreover,the recyclability of the prepared catalyst was investigated with no obvious decrease in catalytic performance after 10 runs,greatly higher than that without a BN shell,suggesting excellent durability.

关 键 词：oxidative desulfurization core–shell boron nitride Au nanocatalyst confinement effect 

分 类 号：O64[理学—物理化学]