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题名: Hydrazine decomposition and CO adsorption microcalorimetry oil tungsten carbide catalysts with different phases
作者: Sun Jun1, 2;  Wang Xingtang1, 2;  Wang Xiaodong1;  Zheng Mingyuan1;  Wang Aiqin1;  Zhang Tao1
关键词: tungsten carbide ;  temperature-programmed reaction ;  hydrazine decomposition ;  microcalorimetry ;  carbon deposition
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2008-08-01
卷: 29, 期:8, 页:710-714
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Tungsten carbides with different crystal phases were prepared by temperature-programmed reaction of WO3 in a CH4/H-2, atmosphere, and the phase transition occurring during this process was described. The catalytic activity of the tungsten carbides for hydrazine decomposition was investigated, and the active sites were determined by CO adsorption microcalorimetry. The results showed that the CO adsorption became strong with the formation of a W2C crystal phase, and the W2C exhibited the best catalytic performance for N2H4 decomposition. However, when the preparation temperature was higher than 750 degrees C, there was a significant amount of carbonaceous species deposited on the catalyst surface, which resulted in severe deactivation. The surface-clean WC possessed a higher intrinsic activity for N2H4 than the W2C owing to its stronger noble metallic properties.
关键词[WOS]: NITRIDE CATALYSTS ;  METAL CARBIDES ;  SURFACE-AREA ;  MOLYBDENUM ;  TRANSITION ;  OXYGEN
语种: 英语
WOS记录号: WOS:000259341000008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141000
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Sun Jun,Wang Xingtang,Wang Xiaodong,et al. Hydrazine decomposition and CO adsorption microcalorimetry oil tungsten carbide catalysts with different phases[J]. CHINESE JOURNAL OF CATALYSIS,2008,29(8):710-714.
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