The mechanism of reduction of cobalt by hydrogen
The mechanism of reduction of cobalt by hydrogen
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DOI：
10.1016/j.matchemphys.2003.12.028
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发表时间：
2004-05-15
影响因子：
4.6
通讯作者：
Chen, YW
中科院分区：
文献类型：
--
作者：
Lin, HY;Chen, YW
采用浸渍法制备了二氧化硅负载钴催化剂，并采用程序升温还原（TPR）对其进行了表征。H作为还原剂。观察到两阶段减少。Co_3O_4先被还原为CoO，然后再被还原为金属Co，两步还原反应的活化能分别为94.43和82.97kJ·mol ~（-1）。还原模型的TPR模式的模拟呈现了二维成核的良好拟合，根据Avarmi-Erofeev模型还原Co 3 O 4为CoO和单分子模型还原CoO为Co。（C）2004 Elsevier B. V.保留所有权利。
Cobalt catalysts supported on silica were prepared by an impregnating method and characterized using temperature-programmed reduction (TPR). H, was used as the reduction agents. The two-stage reduction was observed. Co3O4 was reduced to CoO and then reduced to metallic Co. The activation energies for the two reduction steps of cobalt oxide are 94.43 and 82.97 kJ mol(-1), respectively. The simulation by reduction models of the TPR patterns presents well-fitting of two-dimensional nucleation according to Avarmi-Erofeev model for the reduction Of Co3O4 to CoO and unimolecular model for the reduction of CoO to Co. (C) 2004 Elsevier B.V. All rights reserved.