Direct decomposition of nitrogen monoxide on (Ho, Zr, Pr)_2O_<3+δ> Catalysts
Direct decomposition of nitrogen monoxide on (Ho, Zr, Pr)_2O_<3+δ> Catalysts
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(Ho,Zr,Pr)_2O_<3+δ>催化剂上直接分解一氧化氮
DOI：
10.1016/j.catcom.2013.09.013
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发表时间：
2013
影响因子：
3.7
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Soichiro Tsujimoto;et al.
采用具有大量碱性中心的C型立方晶系钬氧化物（Ho 2 O3）作为NO分解催化剂的主体材料，并在晶格中引入锆和镨离子以增加比表面积和控制Ho 2 O3的O2脱附能力.（Ho0.87Zr0.05Pr0.08）2O3.05 +δ的催化活性最高，在900 °C无共存气体（NO/He气氛）条件下，NO转化为N2的转化率高达71%。即使在共存气体的存在下，催化剂的活性仍保持在高的转化率;即使在5体积%的O2和CO2的存在下，N2的收率分别为50%和47%。
C-type cubic holmium oxide (Ho2O3), which has a large number of basic sites, was employed as a host material for NO decomposition catalysts, and zirconium and praseodymium ions were introduced into the lattice to increase the surface area and to control O2desorption ability of Ho2O3, respectively. The highest catalytic activity was obtained for (Ho0.87Zr0.05Pr0.08)2O3.05 +δ, on which the NO conversion to N2was as high as 71% at 900 °C in the absence of coexisting gases (NO/He atmosphere). The catalytic activity was maintained at a high conversion ratio even in the presence of the coexisting gases; the N2yields of 50% and 47% were obtained even in the presence of 5 vol% O2and CO2, respectively.