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Effect of strontium substitution on the activity of La2−x Sr x NiO4 (x = 0.0–1.2) in NO decomposition

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Abstract

The aim of this work is to study the effect of Sr substitution on the redox properties and catalytic activity of La2−x Sr x NiO4 (x = 0.0–1.2) for NO decomposition. Results suggest that the x = 0.6 sample shows the highest activity. The characterization (TPD, TPR, etc.) of samples indicates that the x = 0.6 sample possesses suitable abilities in both oxidation and reduction, which facilitates the proceeding of oxygen desorption and NO adsorption. At temperature below 700°C, the oxygen desorption is difficult, and is the rate-determining step of NO decomposition. With the increase of reaction temperature (T > 700°C), the oxygen desorption is favorable and, the active adsorption of NO on the active site (NO + V o + Ni2+ → NO−-Ni3+) turns out to be the rate-determining step. The existence of oxygen vacancy is the prerequisite condition for NO decomposition, but its quantity does not relate much to the activity.

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Authors and Affiliations

  1. National Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou, 350002, China

    Zhu JunJiang & Wei KeMei

  2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Yang XiangGuang

  3. College of Chemistry & Chemical Engineering, Fuzhou University, Fuzhou, 350002, China

    Xu XueLian

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  1. Zhu JunJiang
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  2. Yang XiangGuang
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  3. Xu XueLian
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  4. Wei KeMei
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Correspondence to Zhu JunJiang.

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Supported by the National Hi-Tech Research and Development Program of China (863 Program)(Grant No. 2004CB 719502) and the National Natural Science Foundation of China (Grant No. 20177022)

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Zhu, J., Yang, X., Xu, X. et al. Effect of strontium substitution on the activity of La2−x Sr x NiO4 (x = 0.0–1.2) in NO decomposition. SCI CHINA SER B 50, 41–46 (2007). https://doi.org/10.1007/s11426-007-0015-y

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  • DOI: https://doi.org/10.1007/s11426-007-0015-y

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