The Catalytic Reduction of Nitrogen Oxide by Carbon Monoxide over Metal Oxide Catalysts —The Correlation of the Activities with the Surface States of Metal Oxides—
The Catalytic Reduction of Nitrogen Oxide by Carbon Monoxide over Metal Oxide Catalysts —The Correlation of the Activities with the Surface States of Metal Oxides—
复制标题
金属氧化物催化剂上一氧化碳催化还原氮氧化物——活性与金属氧化物表面状态的相关性——
DOI：
10.1246/bcsj.49.1732
复制
发表时间：
1976
影响因子：
4
通讯作者：
S. Teranishi
中科院分区：
文献类型：
--
作者：
Katsumi Sakurai;Y. Okamoto;T. Imanaka;S. Teranishi
在金属氧化物催化NO-CO反应中，用ESCA研究了还原态金属氧化物的表面状态，探讨了还原态金属氧化物催化剂的NO-CO反应活性与其表面状态的关系。用ESCA研究了原位处理后的催化剂表面。结果表明，金属氧化物的表面状态并不总是与它们的体相成分一致。例如，发现在通过CO进行适当还原处理之后，钴氧化物的表面层中的氧比其本体中的氧更丰富。此外，成功地解释了这些氧化物的表面状态和活性之间的相关性。还得出结论，在NO-CO反应中，金属状态对于钴、铁和镍的氧化物是最活跃的，而Cu+状态对于氧化铜比Gu金属状态更活跃。
In the catalytic NO–CO reaction over metal oxide catalysts, the surface states of reduced metal oxides were studied with ESCA, and the correlation of the activities of the reduced metal oxide catalysts for the NO–CO reaction with their surface states was investigated. The surfaces of the catalysts were studied with ESCA after treatments in situ. It was revealed that the surface states of the metal oxides did not always agree with their bulk constituents. For example, it was found that the oxygen in the surface layer of the cobalt oxide after a proper reduction treatment by CO was richer than in its bulk. Moreover, the correlation between the surface states and the activities of those oxides was successfully explained. It was also concluded that, in the NO–CO reaction, the metal states were most active for the cobalt, iron, and nickel oxides, while the Cu+ state was more active than the Gu metal state for the copper oxide.