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| 论文编号: |
122214O120120048 |
| 第一作者所在部门: |
610组 |
| 中文论文题目: |
Single-step thermal carburization synthesis of supported molybdenum carbides from molybdenum-containing methyl-silica
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| 英文论文题目: |
Single-step thermal carburization synthesis of supported molybdenum carbides from molybdenum-containing methyl-silica
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| 论文题目英文: |
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| 作者: |
周隽
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| 论文出处: |
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| 刊物名称: |
Journal of Natural Gas Chemistry
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| 年: |
2011
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| 卷: |
20 |
| 期: |
3 |
| 页: |
271 |
| 联系作者: |
周隽 |
| 收录类别: |
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| 影响因子: |
1.345
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| 摘要: |
A novel synthesis route to obtain highly dispersed molybdenum carbides in porous silica is described．The synthesis was carried out by a single．step heat treatment of molybdenum-containing and methyl-modified silica(Mo-M-Si02)in argon atmosphere at 973 K．Mo-M-Si02 precursor was facilely obtained via aone-pot synthesis route，using(NI-14)6MoT024·4H20(AHM)as molybdenum sources and polymethylhy·drosiloxane fPMHSl as silica sources at the initial synthetic step．The optimal C/Mo molar ratio in reaction system for complete carburization of molybdenum species was 7．The carburization process of molybdenum species followed a nontopotactic route involving aM002 intermedi—ate phase，which was evidenced by XRD，N2 adsorption．desorption and in situ XPS．Formation mechanism of Mo-M-Si02 precursor was also proposed by observation of the reaction between AHM and PMHS with TEM．Furthermore．by adding TEOS into silica sources and adjusting TEOS/PMHS mass ratio，crystal phase of molybdenum carbides transferred from p-M02C to n-MoC]-z，and Si02 structure changed from microporous to micro/mesoporous．Catalytic performances of samples were tested using CO hydrogenation as aprobe reaction．The supported molybdenum carbides exhibited high selectivity for higher alcohol synthesis compared with bulk p-M02C and Q-MoCl-z． |
| 英文摘要: |
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| 外单位作者单位: |
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