Influence of synthesis route on the catalytic properties of La1-xSrxMnO3
Influence of synthesis route on the catalytic properties of La1-xSrxMnO3
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DOI：
10.1016/s0167-2738(00)00668-8
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发表时间：
2000-06-01
影响因子：
3.2
通讯作者：
Drennan, J
中科院分区：
文献类型：
--
作者：
Bell, RJ;Millar, GJ;Drennan, J
采用固相反应、滴热解、柠檬酸盐、溶胶-凝胶、碳酸盐和草酸盐共沉淀法合成了锰酸镧（LSM）粉末。用XRD、氧的TPD、TPR和简单氧化反应（一氧化碳制二氧化碳）的催化活性对焙烧至1000℃5 h的LSM样品进行了表征。结果发现，虽然这六种样品具有相似的成分和表面积，但它们在催化表征过程中的表现却截然不同。这些观察到的差异与合成方式的关系更密切，而不是粉末的物理性质或杂质水平，这表明不同的合成方法产生的表面结构在催化条件下表现得非常不同。go沉淀和滴注热解产生的结构最有效地促进了氧化型反应。(C) 2000由Elsevier Science B.V.出版，版权所有。
Lanthanum Strontium Manganate (LSM) powders were synthesised by six different routes, namely solid state reaction, drip pyrolysis, citrate, sol-gel, carbonate and oxalate co-precipitation. The LSM samples, produced by firing to 1000 degrees C for 5 h were then characterised by way of XRD, TPD's of oxygen, TPR and catalytic activity for a simple oxidation reaction, that of carbon monoxide to carbon dioxide. It was found that although the six samples had similar compositions and surface areas they performed quite differently during catalytic characterisation. These observed differences correlated more closely to the mode of synthesis, than to the physical properties of the powders, or their impurity levels, indicating that the surface structures created by the different syntheses perform very differently under catalysis conditions. Go-precipitation and drip pyrolysis produced structures that were most efficient at facilitating oxidation type reactions. (C) 2000 Published by Elsevier Science B.V. All rights reserved.