A pronounced catalytic activity of La$z.sbnd;Cu oxide supported on ZrO2 for reaction between nitrogen monoxide and carbon monoxide
A pronounced catalytic activity of La$z.sbnd;Cu oxide supported on ZrO2 for reaction between nitrogen monoxide and carbon monoxide
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DOI：
10.1016/0021-9517(91)90171-y
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发表时间：
1991-12
影响因子：
7.3
通讯作者：
N. Mizuno;M. Yamato;Mika Tanaka;M. Misono
中科院分区：
文献类型：
--
作者：
N. Mizuno;M. Yamato;Mika Tanaka;M. Misono
一氧化碳（CO）和碳氢化合物对一氧化氮（NO）的还原是去除汽车尾气中NO{sub x}的基本反应途径。因此，从基础研究的角度来看，开发和研究CO还原NO的高活性催化剂是有意义的，尽管对于实际废气来说，H{sub 2}O和SO{sub 2}的作用是不可忽视的。有报道称，具有钙钛矿相关结构的Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y}、YBa{sub 2}Cu{sub 3}O{sub y{prime}}、La{sub 2}CuO{sub 4}等含铜混合氧化物对NO与CO的反应具有较高的催化活性，且铜离子价接近2的催化剂对该反应具有较强的催化活性。钙钛矿型混合氧化物LaCoO{sub 3}可以高度分散在ZrO{sub 2}上，并具有增强的催化活性。ZrO{sub 2}也被认为是制备含铜超导氧化物薄膜的合适衬底。他们在本研究中尝试制备了高度分散在ZrO{sub 2}表面的La{sub 2}CuO{sub 4}，并获得了非常高的NO与CO反应催化活性。
The reductions of nitrogen monoxide (NO) by carbon monoxide (CO) and hydrocarbon are the fundamental reaction pathways for the removal of NO{sub x} from automobile exhaust. Therefore, it is meaningful from the standpoint of basic research to develop and investigate a high-activity catalyst for the reduction of NO by CO, although for the actual exhaust the effects of H{sub 2}O and SO{sub 2} cannot be ignored. It has been reported that copper-containing mixed oxides having perovskite related structures such as Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y}, YBa{sub 2}Cu{sub 3}O{sub y{prime}}, and La{sub 2}CuO{sub 4}show high catalytic activities for the reaction between NO and CO and that the catalysts having the valence of copper ion close to two are active for the reaction. The authors have reported that the perovskite-type mixed oxide, LaCoO{sub 3}, can be highly dispersed on ZrO{sub 2} and gave an enhanced catalytic activity. ZrO{sub 2} is also known as a suitable substrate for preparing copper-containing superconducting oxide films. They attempted in this study to prepare La{sub 2}CuO{sub 4} highly dispersed on the surface of ZrO{sub 2} and obtained a very high catalytic activity for the reaction between NO and CO.