Nickel based mesoporous silica-ceria-zirconia composite for carbon dioxide reforming of methane
文献类型:期刊论文
作者 | Xiang XM(向贤梅)1,2; Zhao HH(赵华华)1; Yang J(杨建)1; Zhao J(赵军)1; Yan L(闫亮)1; Song HL(宋焕玲)1; Chou LJ(丑凌军)1; Chou LJ(丑凌军) |
刊名 | Applied Catalysis A: General |
出版日期 | 2016 |
卷号 | 520页码:140-150 |
ISSN号 | 0926-860X |
关键词 | Mesoporous Silica-ceria-zirconium composite Oxygen vacancy CO2 reforming Stability |
通讯作者 | 丑凌军 |
英文摘要 | A series of mesoporous silica-ceria-zirconia composite (Si-MCeZr) with variable Si/(Ce + Zr) molar ratios are prepared by improved evaporation induced self-assemble strategy (EISA). TEM and XRD measurements show that the Si-MCeZr frameworks are made of ceria-zirconia solid solutions crystalline nanoparticles and the amorphous silica that serves as glue connecting the nanocrystals. The further heating treatment (700 °C) reveals that the thermal stability of Si-MCeZr is higher than that of Si free mesoporous ceria-zirconia solid solution (MCeZr). This might be due to the key role of the introduction of Si, which improves the thermal stability via inhibiting the growth of nanoparticles and crystallization of ceria-zirconia solid solution nanoparticles. Furthermore, the Si-MCeZr materials are applied as support to prepare nickel based catalysts (Ni/Si-MCeZr) for CO2 reforming of CH4. The XPS analyses show that the concentration of surface oxygen vacancies in Ni/Si-MCeZr increases with the increasing of Si/(Ce + Zr) molar ratios. The long term reforming test demonstrates that the catalytic stability of Ni/Si-MCeZr is improved compared to Si free nickel based catalyst (Ni/MCeZr). The obtained results indicate that enhanced durability may originate from the higher concentration of oxygen vacancies, more rapid oxygen mobility and improved nickel dispersion in Ni/Si-MCeZr, which contribute largely to higher catalytic activity and decoking ability in reforming reaction, as confirmed by TG-DSC and XRD characterizations of catalysts before and after stability tests. |
学科主题 | 物理化学与绿色催化 |
资助信息 | the State Key Program of National Natural Science of China (No. 21133011);National Natural Science Foundation of China (No. 21373244;No. 21403255;No. 21573260) |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000378369400017 |
源URL | [http://210.77.64.217/handle/362003/20128] |
专题 | 兰州化学物理研究所_OSSO国家重点实验室 |
通讯作者 | Chou LJ(丑凌军) |
作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Xiang XM,Zhao HH,Yang J,et al. Nickel based mesoporous silica-ceria-zirconia composite for carbon dioxide reforming of methane[J]. Applied Catalysis A: General,2016,520:140-150. |
APA | Xiang XM.,Zhao HH.,Yang J.,Zhao J.,Yan L.,...&丑凌军.(2016).Nickel based mesoporous silica-ceria-zirconia composite for carbon dioxide reforming of methane.Applied Catalysis A: General,520,140-150. |
MLA | Xiang XM,et al."Nickel based mesoporous silica-ceria-zirconia composite for carbon dioxide reforming of methane".Applied Catalysis A: General 520(2016):140-150. |
入库方式: OAI收割
来源:兰州化学物理研究所
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