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Effect of pH value of silica on reducibility of CO/SiO2 catalyst
其他题名pH值对Co/ SiO2 催化剂还原性能的影响
Gao, HY; Yang, WS; Xiang, HW; Li, YW; Sun, YH; Liu, T; Xie, YI; Zhang, J; Hu, TD; Liu T(刘涛); Xie YN(谢亚宁); Zhang J(张静); Hu TD(胡天斗)
2002
发表期刊CHINESE JOURNAL OF CATALYSIS
卷号23期号:5页码:430-434
通讯作者Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China
摘要A new method was proposed to modify commercial silica for preparation of a series of supported Co/SiO2 catalyst to get more reducibility. The temperature-programmed reduction and the extended X-ray absorption fine structure were used to investigate the structure and reducibility of the catalyst samples. The results indicated that the cobalt species of calcined samples exist in Co3O4 state, and its reduction is a two-step process Co3O4-->CoO-->Co. CoO tends to react with the surface silicon to form some cobalt species which are difficult to be reduced, leading to the decrease of the reducibility of Co3O4. The FT-IR result of the silica at 673 K and 1.3 mPa indicated that the higher pH value of the support leads to more surface silicon at higher temperature, and the more surface silicon may result in further reaction between CoO and silica. The reduction mechanism of Co/SiO2 catalyst was speculated, and it was used to interpret the effect of other conditions on the formation of Co2SiO4.
文章类型Article
关键词cobalt silica supported catalyst reducibility pH value
学科领域Chemistry; Engineering
研究领域[WOS]Chemistry ; Engineering
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语种英语
WOS类目Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS记录号WOS:000178634300011
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237456
专题多学科研究中心
实验物理中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Gao, HY,Yang, WS,Xiang, HW,et al. Effect of pH value of silica on reducibility of CO/SiO2 catalyst[J]. CHINESE JOURNAL OF CATALYSIS,2002,23(5):430-434.
APA Gao, HY.,Yang, WS.,Xiang, HW.,Li, YW.,Sun, YH.,...&胡天斗.(2002).Effect of pH value of silica on reducibility of CO/SiO2 catalyst.CHINESE JOURNAL OF CATALYSIS,23(5),430-434.
MLA Gao, HY,et al."Effect of pH value of silica on reducibility of CO/SiO2 catalyst".CHINESE JOURNAL OF CATALYSIS 23.5(2002):430-434.
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