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首页> 外文期刊>RSC Advances >Morphological and structural characterisation of sol-gel electrospun Co3O4 nanofibres and their electro-catalytic behaviour
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Morphological and structural characterisation of sol-gel electrospun Co3O4 nanofibres and their electro-catalytic behaviour

机译：溶胶-凝胶电纺Co3O4纳米纤维的形貌和结构表征及其电催化行为

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摘要

Evolution of hydrogen and oxygen are a crucial part of many renewable energy systems. The replacement of the essential and expensive components in such systems can reduce the capital cost and improve the effectiveness of those systems. In this study, Co3O4 nanofibres were fabricated from sol-gel assisted electrospun poly(styrene-co-acrylonitrile)/cobalt acetate tetrahydrate precursor composite fibres. The morphological and compositional features of the Co3O4 nanofibres obtained after calcination of the precursor nanofibers were studied using scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The results of X-ray diffraction study and Raman spectroscopy revealed that the average grain size of the fibres increased with the calcination temperature. Clear evidence of defects in the fibres was observed in ultraviolet-visible-near infrared and energy dispersive spectroscopic measurements. The electrocatalytic behaviour of Co3O4 nanofibres obtained at different calcination temperatures was studied using them for the water splitting reaction in an alkaline medium. The maximum efficiency in the hydrogen evolution reaction was achieved using the Co3O4 nanofibres obtained at the lowest calcination temperature, which had the highest surface area and the smallest grain size.
机译：氢和氧的逸出是许多可再生能源系统的关键部分。在这种系统中更换必要且昂贵的组件可以降低资本成本并提高这些系统的效率。在这项研究中，Co3O4纳米纤维是由溶胶-凝胶辅助电纺聚（苯乙烯-丙烯腈）/醋酸钴四水合物前体复合纤维制成的。使用扫描电子显微镜，透射电子显微镜，X射线光电子能谱和傅里叶变换红外光谱研究了前体纳米纤维煅烧后获得的Co3O4纳米纤维的形貌和组成特征。 X射线衍射研究和拉曼光谱分析的结果表明，纤维的平均晶粒度随煅烧温度而增加。在紫外-可见-近红外和能量色散光谱测量中观察到了明显的纤维缺陷证据。研究了在不同煅烧温度下获得的Co3O4纳米纤维在碱性介质中的水分解反应的电催化性能。使用在最低煅烧温度下获得的Co3O4纳米纤维可实现最大的氢气析出反应效率，该煅烧温度具有最高的表面积和最小的晶粒尺寸。

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