Trifunctional strategy for the design and synthesis of a Ni-CeO_(2)@SiO_(2)catalyst with remarkable low-temperature sintering and coking resistance for methane dry reforming

作     者：Sixue Lin Jing Wang Yangyang Mi Senyou Yang Zheng Wang Wenming Liu Daishe Wu Honggen Peng 林思雪;王晶;米阳阳;杨参有;王政;刘文明;吴代赦;彭洪根

作者机构：College of ChemistryKey Laboratory of Poyang Lake Environment and Resource UtilizationMinistry of EducationSchool of Resources Environmental and Chemical EngineeringNanchang UniversityNanchang 330031JiangxiChina State Key Laboratory of High-efficiency Utilization of Coal&Green Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaChina 

基　　金：国家自然科学基金(2197607&21773106) 国家重点研发计划项目(2016YFC0205900) 江西省自然科学基金(20201BAB203024) 省部共建煤炭高效利用与绿色化工国家重点实验室开放基金(2018-K04) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第10期

页      码：1808-1820页

摘      要：In this study,a trifunctional strategy was developed to prepare a confined Ni-based catalyst(Ni-CeO_(2)@SiO_(2))for dry reforming of methane(DRM)of two main greenhouse gases-CO_(2)and CH_(4).The Ni-CeO_(2)@SiO_(2)catalyst was fabricated by utilizing the confinement effect of the SiO_(2)shell and the synergistic interaction between Ni-Ce and the decoking effect of CeO_(2).The catalysts were systematically characterized via X-ray diffraction,N_(2 )adsorption/desorption,transmission electron microscopy,energy dispersive X-ray spectroscopy,hydrogen temperature reduction and desorption set by program,oxygen temperature program desorption,Raman spectroscopy,thermogravimetric analysis,and in situ diffuse reflectance infrared Fourier transform spectroscopy measurements to reveal their physicochemical properties and reaction *** Ni-CeO_(2)@SiO_(2)catalyst exhibited higher activity and stability than the catalyst synthesized via the traditional impregnation *** addition,no carbon deposition was detected over Ni-CeO_(2)@SiO_(2)after a 100 h durability test at 800℃,and the average particle size of Ni nanoparticles(NPs)in the catalyst increased from 5.01 to 5.77 ***,Ni-CeO_(2)@SiO_(2)also exhibited superior low-temperature stability;no coke deposition was observed when the catalyst was reacted at 600℃ for 20 *** high coking and sintering resistance of this confined Ni-based DRM catalyst can be attributed to its trifunctional *** trifunctional strategy developed in this study could be used as a guideline to design other high-performance catalysts for CO_(2)and CH4 dry forming and accelerate their industrialization.

主 题 词：Methane dry forming Low-temperature stability Coke resistance Tri functional strategy CO_(2)utilization 

学科分类：083002[083002] 0830[工学-生物工程类] 081705[081705] 08[工学] 0817[工学-轻工类] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1872-2067(21)63789-0

馆 藏 号：203103680...