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Citation: Xiao Shu-Yong, Yao Jie, Meng Zhong-Yue. Probe Into NH₃-TPD Curve of Ni-Containing Zeolite Out The View of Acidity[J]. Acta Physico-Chimica Sinica, ;1991, 7(06): 721-724. doi: 10.3866/PKU.WHXB19910617 shu

Probe Into NH₃-TPD Curve of Ni-Containing Zeolite Out The View of Acidity

1.
Department of Chemistry, Nanjing Normal University, Nanjing 210024

Received Date: 25 June 1990
Available Online: 15 December 1991

Two peaks, appeared respectively at Ca. 900 K and 800 K on the NH_3-TPD curve of Ni-containing Y zeolite, have been investigated. These two peaks can't be simply explained by means of acidity.
One peak observed at Ca. 90O K, has been contributed to the water gas resulted from the dehydroxylation of zeolite. Another peak, appeared at Ca. 800 K, has been proved to be due to NH_3, formed by decomposation of a complex with the suggested formula Ni~(2+)(NH)_x(OH~-)_(6-x). This complex resulted from the interaction of adsorbed NH_3, the supported Ni~(2+) species and the skeleton OH groups under suitable conditions and decomposed at Ca. 800 K by a first order reaction with an activation energy of about 90.74 kJ·mol~(-1).
- Zeolite; Supported Ni species; NH₃-TPD
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Probe Into NH3-TPD Curve of Ni-Containing Zeolite Out The View of Acidity

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通讯作者: 陈斌, bchen63@163.com

Probe Into NH₃-TPD Curve of Ni-Containing Zeolite Out The View of Acidity