CH4 TPR-MS of NiO/MgO solid solution catalysts

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	CH4 TPR-MS of NiO/MgO solid solution catalysts
	Hu, YH ; Ruckenstein, E ; Hu YX(胡云行)
刊名	http://dx.doi.org/10.1021/la960986j
	1997-04-02
关键词	MAGNESIUM-OXIDE CARBON-MONOXIDE NICKEL-OXIDE ADSORPTION SAMPLES DIOXIDE
英文摘要	The activation of CH4 over NiO/MgO was investigated via temperature-programmed reaction mass spectroscopy (TPR-MS). Over pure MgO, CH4 is not activated, while over pure NiO, CH4 is activated to CO2 around 660 degrees C. There are two kinds of CH4 activations over the NiO/MgO solid solution catalysts prepared by the impregnation of MgO with Ni(NO3)(2) solutions and calcination at 800 degrees C: the activation to CO and CO2 by the oxygen of the surface NiO dissolved in MgO, which is characterized by relatively sharp peaks, followed by the slow activation of CH4 by the bulk lattice oxygen bound to the Ni ions. The temperatures corresponding to the sharp peak and to the beginning of the slow activation decrease with increasing NiO content. The activation temperature is lower by about 230 degrees C over a catalyst prepared by mechanical mixing of NiO and MgO powders followed by calcination at 800 degrees C than over the catalyst prepared by impregnation, and it is lower by 120 degrees C than that over pure NiO. This is likely a result of the formation of a thin layer of NiO/MgO solid solution over MgO particles during the calcination of the mixture and of the defects formed in that layer and in the NiO particles.
语种	英语
出版者	LANGMUIR
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88465]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Hu, YH,Ruckenstein, E,Hu YX. CH4 TPR-MS of NiO/MgO solid solution catalysts[J]. http://dx.doi.org/10.1021/la960986j,1997.
APA	Hu, YH,Ruckenstein, E,&胡云行.(1997).CH4 TPR-MS of NiO/MgO solid solution catalysts.http://dx.doi.org/10.1021/la960986j.
MLA	Hu, YH,et al."CH4 TPR-MS of NiO/MgO solid solution catalysts".http://dx.doi.org/10.1021/la960986j (1997).