A confined growth strategy to construct 3DOM SiO2 nanoreactor in-situ embedded Co3O4 nanoparticles catalyst for the catalytic combustion of VOCs:Superior H2O and SO2 resistance

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外文摘要：SO2 poisoning is a common problem in the catalytic combustion of volatile organic compounds(VOCs).In this work,we took three-dimensionally ordered macroporous and mesoporous(3DOM)SiO2 as the nanoreactor to protect active sites from SO2 erosion in the catalytic combustion of benzene.Simultaneously,the confined growth of metal active nanoparticles in the multi-stage pore is also full of challenges.And we successfully confined Co3O4 nanoparticles(NPs)in macroporous and mesoporous channels.Interestingly,the precursors'growth in the pore was controlled and nanoreactors with different pore sizes were prepared by adjusting the loading amount and preparation methods.It is discovered that the Co3O4 NPs confined in 3DOM SiO2 nanoreactor showed superior sulfur and water resistance.Density functional theory(DFT)calculations verified that the Co-Si catalyst had high SO2 adsorption energy(-0.48 eV),which illustrated that SO2 was hard to attach to the surface of the Co-Si catalyst.The SiO2 nanoreactor had low SO2 adsorption energy(-5.15 eV),which indicated that SO2 was easily absorbed on SiO2 nanoreactor.This illustrated that the SiO2 nanoreactor could protect effectively active sites from SO2 erosion.

外文关键词：

zeolitic imidazolate frameworks(ZIFs)Co3O4benzene catalytic combustionnanoreactorsulfur and water resistance

作者：

Weigao Han、Shilin Wu、Fang Dong、Weiliang Han、Yinghao Chu、Linghui Su、Zhicheng Tang

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作者单位：

State Key Laboratory for Oxo Synthesis and Selective Oxidation,National Engineering Research Center for Fine Petrochemical Intermediates,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

University of Chinese Academy of Sciences,Beijing 100049,China

College of Architecture and Environment,Sichuan University,Chengdu 610000,China

Dalian National Laboratory for Clean Energy,Dalian 116023,China

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基金：

National Natural Science Foundation of ChinaDNL Cooperation Found,CASJoint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(YLU-DNL)Talents of Innovation and Entrepreneurship Project of Lanzhou,ChinaMajor Program of the Lanzhou Institute of Chemical Physics,CASKey talent project of Gansu Province

项目编号：

52070182DNL2020042022062022-RC-26ZYFZFX-10

出版年：

2024

DOI：

10.1007/s12274-023-5498-0

纳米研究(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.17(1)

参考文献量64