The catalytic methanol synthesis over nanoparticle metal oxide catalysts
The catalytic methanol synthesis over nanoparticle metal oxide catalysts
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DOI：
10.1016/s1381-1169(02)00525-3
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发表时间：
2003-03-03
影响因子：
--
通讯作者：
Klabunde, KJ
中科院分区：
文献类型：
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作者：
Carnes, CL;Klabunde, KJ
制备了几种纳米金属氧化物催化剂，并将其用于氢气和二氧化碳催化合成甲醇的研究。这些催化剂包括：ZnO、CuO、NiO和CuO/ZnO二元体系。通过溶胶-凝胶法制备的催化剂，并发现，通过TEM和BET，具有高的比表面积和小的晶粒尺寸。考虑到这一点，在流动反应器中在不同温度下研究了甲醇的催化生产。计算每个样品的转化率和转化数，发现纳米颗粒ZnO、CuO/ZnO和NiO比市售材料的活性高得多。发现纳米晶体CuO样品快速还原成Cu，在那里它失去所有活性。结果表明，催化过程对于几种纳米颗粒金属氧化物制剂是有效的，然而，铜金属是不活泼的，但是CuO/ZnO基质中的小铜颗粒是非常活泼的组合。(C)2002 Elsevier Science B. V.保留所有权利。
Several nanoparticle metal oxides were prepared and studied for the catalytic production of methanol from hydrogen and carbon dioxide. These catalysts include: ZnO, CuO, NiO, and a binary system CuO/ZnO. The catalysts were prepared through sol-gel synthesis and were found, via TEM and BET, to have high surface areas and small crystallite sizes. With this in mind, the catalytic production of methanol was studied at various temperatures in a flow reactor. The percent conversion and turnover numbers were calculated for each sample, and it was found that the nanoparticle ZnO, CuO/ZnO and NiO were much more active catalysts than the commercially available materials. The nanocrystalline CuO sample was found to rapidly reduce to Cu, where it lost all activity. The results suggest that the catalytic process is efficient for several nanoparticle metal oxide formulations, however, copper metal is not active, but small copper particles in a CuO/ZnO matrix is a very active combination. (C) 2002 Elsevier Science B.V. All rights reserved.