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首页> 外文期刊>Nanotechnology >Synthesis and catalytic activity of electrospun NiO/NiCo2O4 nanotubes for CO and acetaldehyde oxidation
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Synthesis and catalytic activity of electrospun NiO/NiCo2O4 nanotubes for CO and acetaldehyde oxidation

机译：电纺NIO / NiCO2O4纳米管用于CO和乙醛氧化的合成与催化活性

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摘要

NiO/NiCo2O4 nanotubes with a diameter of approximately 100 nm are synthesized using Ni and Co precursors via electro-spinning and subsequent calcination processes. The tubular structure is confirmed via transmission electron microscopy imaging, whereas the structures and elemental compositions of the nanotubes are determined using x-ray diffraction, energy dispersive x-ray spectroscopy, and x-ray photoelectron spectroscopy. N-2 adsorption isotherm data reveal that the surface of the nanotubes consists of micropores, thereby resulting in a significantly higher surface area (similar to 20 m(2) g(-1)) than expected for a flat-surface structure (15 m(2) g(-1)). Herein, we present a study of the catalytic activity of our novel NiO/NiCo2O4 nanotubes for CO and acetaldehyde oxidation. The catalytic activity of NiO/NiCo2O4 is superior to Pt below 100 degrees C for CO oxidation. For acetaldehyde oxidation, the total oxidation activity of NiO/NiCo2O4 for acetaldehyde is comparable with that of Pt. Coexistence of many under-coordinated Co and Ni active sites in our structure is suggested be related to the high catalytic activity. It is suggested that our novel NiO/NiCo2O4 tubular structures with surface microporosity can be of interest for a variety of applications, including the catalytic oxidation of harmful gases.
机译：使用Ni和Co前体通过电纺丝和随后的煅烧方法合成直径约为100nm的NiO / NicO2O4纳米管。通过透射电子显微镜成像确认管状结构，而纳米管的结构和元素组合物使用X射线衍射，能量分散X射线光谱和X射线光电子能谱测定。 N-2吸附等温数据显示，纳米管的表面由微孔组成，从而导致扁平表面结构的预期比预期更高的表面积（类似于20μm（2 )g（-1））（＆lt ;. 15米（2）G（-1））。在此，我们介绍了我们用于CO和乙醛氧化的新型NiO / NiCO2O4纳米管的催化活性的研究。对于共氧化，NiO / NicO 2 O 4的催化活性优于Pt以下100℃。对于乙醛氧化，NiO / NicO 2 O 4对乙醛的总氧化活性与Pt的总氧化活性与Pt的总相当。建议我们结构中许多欠协调的CO和NI活性位点的共存与高催化活性有关。建议我们具有表面微孔的新的NIO / NICO2O4管状结构对于各种应用感兴趣，包括催化氧化有害气体。

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