Characterization and tests of planar Co3O4 model catalysts prepared by chemical vapor deposition
Characterization and tests of planar Co3O4 model catalysts prepared by chemical vapor deposition
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DOI：
10.1016/j.apcatb.2004.06.001
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发表时间：
2004-11-18
影响因子：
22.1
通讯作者：
Kleineberg, U
中科院分区：
文献类型：
--
作者：
Bahlawane, N;Rivera, EF;Kleineberg, U
采用化学气相沉积法以乙酰丙酮钴 (II) 和氧气为原料沉积氧化钴薄膜。对沉积过程进行了研究，所得薄膜被鉴定为立方尖晶石型多晶Co3O4，晶粒尺寸为30-40 nm。该涂层不含碳，并且通过 AES 分析测得表面氧浓度为 66 at.%。在平面不锈钢基材上沉积光滑且高度均匀的薄膜，并进行 TPR 和催化测试，结果显示正相关。 Co 3 O 4 还原成COO的表观活化能为(33+/-5)kJ/mol。研究了 Co3O4 将丙烷和乙醇转化为二氧化碳的催化活性。尽管催化作用是在相同温度下记录的。停用过程被认为是不同的。乙醇的催化转化会引起快速失活过程，这与其高还原 Co3O4 的能力有关。 (C) 2004 Elsevier B.V. 保留所有权利。
The chemical vapor deposition method was used to deposit thin films of cobalt oxide starting with cobalt (II) acetylacetonate and oxygen. The deposition process was investigated and the obtained films were identified as a cubic spinel-type polycrystalline Co3O4 with a crystallite size of 30-40 nm. The coating was carbon-free and the Surface oxygen concentration was measured to be 66 at.% with AES analysis. Smooth and highly uniform thin films were deposited on planar stainless steel substrates and subjected to TPR and catalysis tests that show positive correlation. The apparent activation energy Of Co3O4 reduction to COO was measured to be (33 +/- 5) kJ/mol. The catalytic activity of Co3O4 was investigated toward the conversion of both propane and ethanol to carbon dioxide. Though the catalytic action was registered at the same temperature. the deactivation process was seen to be different. The catalytic conversion of ethanol induces a fast deactivation process, which was linked to its high ability to reduce Co3O4. (C) 2004 Elsevier B.V. All rights reserved.