期刊
CATALYSIS LETTERS
卷 129, 期 1-2, 页码 240-246出版社
SPRINGER
DOI: 10.1007/s10562-008-9807-8
关键词
Manganese; Nickel; NO decomposition; Perovskite-like oxides; O-2-TPD; H-2-TPR
资金
- Ministry of science and technology of China [2001AA 324060]
- Natural science foundation of China [20177022]
Catalytic NO decomposition on LaSrMn1-x Ni (x) O4+delta (0 a parts per thousand currency sign x a parts per thousand currency sign 1) is investigated. The activity of NO decomposition increases dramatically after the substitution of Ni for Mn, but decreases when Mn is completely replaced by Ni (x = 1.0). The optimum value is at x = 0.8. These indicate that the catalytic performance of the samples is contributed by the synergistic effect of Mn and Ni. O-2-TPD and H-2-TPR experiments are carried out to explain the change of activity. The former indicates that only when oxygen vacancy is created, could the catalyst show enhanced activity for NO decomposition; the latter suggests that the best activity is obtained from catalyst with the most matched redox potentials (in this work, the biggest Delta T and Delta E values). The close relationships between activity and Delta T or Delta E indicate that Delta T and Delta E are important parameters of catalyst for NO decomposition.
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