| Ni系钙钛矿氧化物导电性及其CO氧化活性 |
| STUDIES ON ELECTRICAL CONDUCTIVITY AND CO OXIDATION ACTIVITY OF Ni-BASED PEROVSKITE-LIKE OXIDE CATALYSTS |
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| 摘要: 本文考查了Ni系钙钛矿类希土复合氧化物在不同气氛条件下电导率随温度的变化情况，结合活性评价结果，初步探索了结构、活性及导电率之间的关系。研究结果表明：在测定温度范围内，LaNiO3具有金属导电性，而La2NiO4和LaSrNiO4为p型半导体；电导率与CO氧化活性之间存在相互对应的关系，其大小顺序均为LaNiO3>LaSrNiO4>La2NiO4。 |
| 关键词: 钙钛矿类希土复合氧化物 CO氧化反应 电导率 |
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| Abstract: In the paper, the electrical conductivity variation with temperature in different atmospheres and the CO oxidation activity of Ni-based perovskite-like oxide catalysts were stuided. The results showed that, in the temperature range of CO oxidation, LaNiO3 presents metal conductivity, while La2NiO4 and LaSrNiO4 are characterized by the semiconductivity. In CO oxidation, CO adsorption on LaNiO3 is the key step whereas O2 adsorption on La2NiO4 and laSrNiO4 is the key step. The electrical conductivity order is LaNiO3>LaSrNiO4>La2NiO4, which correspondes to that of their CO oxidation activities. |
| Keywords: perovskite-like oxide catalysts electrical conductivity CO oxidation |
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| 马智,秦永宁,王士文,梁珍成,齐晓周.Ni系钙钛矿氧化物导电性及其CO氧化活性[J].无机化学学报,1997,13(4):416-419. |
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