Direct NO decomposition over La2-xBaxNiO4 catalysts containing BaCO3 phase
Direct NO decomposition over La2-xBaxNiO4 catalysts containing BaCO3 phase
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在含有 BaCO3 相的 La2-xBaxNiO4 催化剂上直接分解 NO
DOI:
10.1016/j.apcatb.2008.01.025
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发表时间:
2008-08
影响因子:
22.1
通讯作者:
Guo Zhang
中科院分区:
文献类型:
--
作者:
Honggang Fu;Yujun Zhu;Fulong Yuan;Dong Wang;Guo Zhang
La2−xBaxNiO4(x≤1.2) catalysts have been prepared by citrate method. XRD patterns and IR spectra indicate that with the doping of Ba, more BaCO3appears and perovskite-like structure is seriously distorted. In directly decomposing 4% NO, the highest N2yield is achieved with La1.2Ba0.8NiO4composed of perovskite-like structure phase and BaCO3in the absence/presence of oxygen. The results of iodometry and H2-TPR reveal that the increase in Ba causes the increase in Ni3+content. O2-TPD and NO adsorption tests confirm that Ba doping resulted in the increase in oxygen vacancy (Vo). Thus, the redox capability and the amount of Vo are enhanced. It is suggested that the BaCO3phase, NOxstorage component, contributes to the increase in activity by NO-TPD, NO2-TPD and in situ DRIFT. Thus, BaCO3plays an important role in quickening up the run of catalytic NO decomposition recycle.
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