Mugheri Abdul Qayoom, Tahira Aneela, Aftab Umair, Abro Muhammad Ishaq, Mallah Arfana Begum, Memon Gulam Zuhra, Khan Humaira, Abbasi Mazhar Ali, Halepoto Imran Ali, Chaudhry Saleem Raza, Ibupoto Zafar Hussain
Dr M. A. Kazi Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan
Department of Science and Technology, Campus Norrkoping, Linkoping University SE-60174 Norrkoping Sweden.
RSC Adv. 2019 Oct 23;9(59):34136-34143. doi: 10.1039/c9ra07224a.
The design of efficient nonprecious catalysts for the hydrogen evolution reaction (HER) or the oxygen evolution reaction (OER) is a necessary, but very challenging task to uplift the water-based economy. In this study, we developed a facile approach to produce porous carbon from the dehydration of sucrose and use it for the preparation of nanocomposites with cobalt oxide (CoO). The nanocomposites were studied by the powder X-ray diffraction and scanning electron microscopy techniques, and they exhibited the cubic phase of cobalt oxide and porous structure of carbon. The nanocomposites showed significant OER activity in alkaline media, and the current densities of 10 and 20 mA cm could be obtained at 1.49 and 1.51 V reversible hydrogen electrode (RHE), respectively. The impedance study confirms favorable OER activity on the surface of the prepared nanocomposites. The nanocomposite is cost-effective and can be capitalized in various energy storage technologies.
设计用于析氢反应（HER）或析氧反应（OER）的高效非贵金属催化剂是推动水基经济发展的一项必要但极具挑战性的任务。在本研究中，我们开发了一种由蔗糖脱水制备多孔碳的简便方法，并将其用于制备与氧化钴（CoO）的纳米复合材料。通过粉末X射线衍射和扫描电子显微镜技术对该纳米复合材料进行了研究，结果表明它们呈现出氧化钴的立方相和碳的多孔结构。该纳米复合材料在碱性介质中表现出显著的析氧反应活性，在可逆氢电极（RHE）1.49 V和1.51 V时分别可获得10和20 mA cm的电流密度。阻抗研究证实了所制备的纳米复合材料表面具有良好的析氧反应活性。该纳米复合材料具有成本效益，可应用于各种储能技术。
