In Situ Processing of a Porous Calcium Zirconate/Magnesia Composite with Platinum Nanodispersion and Its Influence on Nitric Oxide Decomposition
In Situ Processing of a Porous Calcium Zirconate/Magnesia Composite with Platinum Nanodispersion and Its Influence on Nitric Oxide Decomposition
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铂纳米分散体多孔锆酸钙/氧化镁复合材料的原位加工及其对一氧化氮分解的影响
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
T. Ohji
中科院分区：
文献类型：
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作者：
Yoshikazu Suzuki;H. Hwang;N. Kondo;T. Ohji
采用原位反应法（包括PtO 2的热解）在空气中合成了纳米铂含量为1%左右的多孔CaZrO 3/MgO复合材料。该复合材料具有均匀开放的三维孔结构（孔隙率为56%），孔径分布窄。在900°C下研究了NO催化分解为N2和O2以及C2 H4还原NO。在无氧条件下，直接分解时NO转化率可达52%左右，C_2H_4还原时可达100%左右。结果表明，多孔复合材料作为一个多功能过滤器的同时过滤热气体和NOx的去除的可能性。
A porous CaZrO3/MgO composite with ∼1% nanodispersed platinum was synthesized in air using several in situ reactions, including the pyrolysis of PtO2. The composite had a uniformly open, three-dimensional pore structure (porosity of 56%), with a narrow pore-size distribution. Catalytic NO decomposition to N2 and O2 and NO reduction by C2H4 were investigated up to 900°C. In the absence of oxygen, the NO conversion rate reached ∼52% for the direct decomposition and ∼100% for the reduction by C2H4. The results suggested the possibility of the porous composite as a multifunctional filter for simultaneous filtering of hot gas and removal of NOx.