Preparation, microstructure characterization and catalytic performance of Cu/ZnO and ZnO/Cu composite nanoparticles for liquid phase methanol synthesis.
Preparation, microstructure characterization and catalytic performance of Cu/ZnO and ZnO/Cu composite nanoparticles for liquid phase methanol synthesis.
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Cu/ZnO和ZnO/Cu复合纳米颗粒的制备、微观结构表征及液相甲醇合成催化性能
DOI：
10.1039/c2cp40482f
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
R. Fischer
中科院分区：
文献类型：
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作者：
M. Sliem;S. Turner;Denise Heeskens;S. Kalidindi;G. van Tendeloo;M. Muhler;R. Fischer
在硬脂酸盐@ZnO纳米粒子存在下，通过还原金属有机铜前驱体[Cu{（OCH（3））CH（2）N（CH（3））（2）}（2）]，合成了ZnO ∶ Cu = 2和5的硬脂酸盐@Cu/ZnO纳米复合粒子。在ZnO ∶ Cu = 5的情况下，利用高角环形暗场扫描透射电子显微镜（HAADF-STEM）结合电子能量损失谱（EELS）和衰减全反射傅里叶变换红外（ATR-IR）对3-5 nm硬脂酸盐@ZnO颗粒表面沉积的少量Cu进行了定位。当ZnO ∶ Cu = 2时，采用HAADF-STEM技术对催化活性测试后的纳米复合材料的微观结构进行了表征。这揭示了由小ZnO纳米颗粒（3-5 nm）装饰的大Cu纳米颗粒（20-50 nm）的构造。评价了两种复合物对合成气合成甲醇的催化活性。
Stearate@Cu/ZnO nanocomposite particles with molar ratios of ZnO ∶ Cu = 2 and 5 are synthesized by reduction of the metal-organic Cu precursor [Cu{(OCH(CH(3))CH(2)N(CH(3))(2))}(2)] in the presence of stearate@ZnO nanoparticles. In the case of ZnO ∶ Cu = 5, high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) combined with electron-energy-loss-spectroscopy (EELS) as well as attenuated total reflection Fourier transform infrared (ATR-IR) spectroscopy are used to localize the small amount of Cu deposited on the surface of 3-5 nm sized stearate@ZnO particles. For ZnO ∶ Cu = 2, the microstructure of the nanocomposites after catalytic activity testing is characterized by HAADF-STEM techniques. This reveals the construction of large Cu nanoparticles (20-50 nm) decorated by small ZnO nanoparticles (3-5 nm). The catalytic activity of both composites for the synthesis of methanol from syn gas is evaluated.