| 棒状CuFe4Ox的可控合成及其异戊醇脱氢反应的催化性能 |
| Rod-like CuFe4Ox Composite:Controllable Synthesis and Catalytic Performance in Isoamylic Alcohol Dehydrogenation |
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| 摘要: 利用液相沉淀法可控合成了均匀的棒状CuFe4Ox催化剂。通过原位X射线粉末衍射（XRD）、高分辨透射电子显微镜（TEM）及程序升温还原（TPR）等手段表征其晶相结构、形貌和还原性能。通过还原棒状CuFe4Ox获得Cu0/Fe3O4纳米棒，原位X射线光电子能谱（XPS）用于确定Cu0/Fe3O4表面的相组成。通过液相沉淀法制备棒状CuFe4Ox，在120℃保持3 h后加入Na2CO3溶液至pH等于9时所得棒状形貌最为规整。以异戊醇脱氢反应作为探针反应，比较了Cu0/Fe3O4纳米棒和Cu0/Fe3O4纳米颗粒的催化反应性能，发现Cu0/Fe3O4纳米棒比Cu0/Fe3O4纳米粒子具有更好的活性和稳定性，表明棒状Fe3O4担载的Cu纳米粒子具有更好的结构稳定性。 |
| 关键词: CuFe4Ox复合物 XPS 异戊醇脱氢 |
| 基金项目: 国家自然科学基金（No.21403124）和山东省自然科学基金（No.ZR2014JL014，ZR2014BM012）资助项目 |
| Abstract: Uniformly rod-shaped CuFe4Ox catalysts were controllably fabricated through a liquid-phase precipitation method. The phase structure, morphology and reduction properties of the catalyst were characterized by in-situ powder X-ray diffraction (XRD), high resolution transmission electron microscope (HRTEM) and temperature-programmed reduction (TPR). Cu0/Fe3O4-nanorod obtained from the reduction of rod-shaped CuFe4Ox structure and the surface phase composition of Cu0/Fe3O4 was detailed studied by in-situ X-ray photoelectron spectroscopy (XPS). CuFe4Ox composites with rod-shape were prepared by an aqueous precipitation method that means after stirring time at 120℃ for 3 h, Na2CO3 solution was added until pH value equal to 9. In this case, the most uniform CuFe4Ox composites with rod-shape were obtained. Cu0/Fe3O4-nanorod catalyst presents higher activity and stability for the dehydrogenation of isoamylic alcohol than Cu/Fe3O4-nanoparticles, due to Cu0 nanoparticles supported on the rod-shaped Fe3O4 exhibits higher structure stability. |
| Keywords: CuFe4Ox composite XPS dehydrogenation of isoamylic alcohol |
| 投稿时间：2017-07-12 修订日期：2017-09-22 |
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| 马宏彬,马令娟,侯梦宁,岳明波.棒状CuFe4Ox的可控合成及其异戊醇脱氢反应的催化性能[J].无机化学学报,2017,33(12):2193-2200. |
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