Temperature Programmed Desorption of Oxygen and Oxidative Activity of La2-xSrxNiO4

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (1): 107.

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Temperature Programmed Desorption of Oxygen and Oxidative Activity of La_2-xSr_xNiO₄

LOU Hui, ZHENG Hong-Yuan, YANG Ju-Ying, YAO Zhi-Qiang, YU Xun, DU Shao-Bin, MA Fu-Tai

Department of Chemistry, Hangzhou University, Hangzhou, 310028

Received:1994-02-04 Revised:1994-06-14 Online:1995-01-24 Published:1995-01-24

Abstract

Abstract: TPD of oxygen and catalytic activity of oxidation of CO and oxidative coupling of methane on La_2-xSr_xNiO₄were studied. It was shown that two oxygen desorption peaks from two different temperature ranges were related to Ni²⁺and Ni³⁺ions in the crystal structure,respectively. The uptake of O₂desorbed at a lower temperature increased when the amount of Ni²⁺increased,while the uptake of O₂desorbed at a higher temperature increased with the increase of Ni²⁺content.The crystal oxygen took part in the reactions of CO oxidation and OCM directly.

Key words: La_2-xSr_xNiO₄, O₂-TPD, CO oxidation, Oxidatiye coupling of methane

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LOU Hui, ZHENG Hong-Yuan, YANG Ju-Ying, YAO Zhi-Qiang, YU Xun, DU Shao-Bin, MA Fu-Tai. Temperature Programmed Desorption of Oxygen and Oxidative Activity of La_2-xSr_xNiO₄[J]. Chem. J. Chinese Universities, 1995, 16(1): 107.

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Temperature Programmed Desorption of Oxygen and Oxidative Activity of La_2-xSr_xNiO₄

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