Synthesis, characterization and activity pattern of carbon nanofibers based copper/zirconia catalysts for carbon dioxide hydrogenation to methanol: Influence of calcination temperature
Synthesis, characterization and activity pattern of carbon nanofibers based copper/zirconia catalysts for carbon dioxide hydrogenation to methanol: Influence of calcination temperature
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DOI：
10.1016/j.jpowsour.2014.10.087
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发表时间：
2015-01
影响因子：
9.2
通讯作者：
I. U. Din;M. S. Shaharun;D. Subbarao;A. Naeem
中科院分区：
文献类型：
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作者：
I. U. Din;M. S. Shaharun;D. Subbarao;A. Naeem
采用沉积沉淀法合成了一系列新型碳纳米纤维负载的双金属铜/氧化锆催化剂，并在不同温度下焙烧。采用X射线衍射仪、N2吸附-脱附、N2O化学吸附、高分辨电子显微镜、程序升温还原、X射线光电子能谱和程序升温脱附(CO2&NH3)等技术对焙烧后的催化剂进行了表征。详细讨论了构效关系。结果表明，当CO_2/H_2进料体积比为1：3时，合成甲醇的最佳焙烧温度为450℃。CO_2转化率与铜的金属表面积(SCU)成正比，而甲醇合成速率与分散铜的含量呈线性关系。
A series of novel carbon nanofibers (CNFs) supported bimetallic copper/zirconia catalysts are synthesized by deposition precipitation method and calcined at different temperatures. Calcined catalysts are characterized by various techniques like X-ray diffraction, N2adsorption–desorption, N2O chemisorption, high resolution transmission electron microscopy, temperature programmed reduction, X-ray photoelectron spectroscopy and temperature programmed desorption (CO2& NH3). The structure–activity correlation is discussed in details. The results demonstrate 450 °C as optimum calcination temperature for methanol synthesis rate with CO2/H2feed volume ratio of 1:3. CO2conversion is found to be directly proportional to copper metallic surface area (SCu), while a linear relationship is observed between methanol synthesis rate and fraction of dispersed Cu.