Hydrothermal synthesis of MnFe2O4-Embedded polyaniline nanocomposite for enhancement in OER

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society Pub Date : 2025-06-02 DOI:10.1016/j.jics.2025.101817

Iqra Robina , B.M. Alotaibi , Sehrish Ibrahim , Haifa A. Alyousef , Albandari W. Alrowaily , Farhan N. Almufleh , Abdulrahman M. Alotaibi

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引用次数: 0

Abstract

Energy depletion and environmental problems are caused by over use of fossil fuels. Therefore, developing alternate energy sources is crucial. For this, a detailed study was conducted on water electrolysis to meet environmental and energy challenges. A catalyst plays a major role in electrochemical water splitting. Here, MnFe₂O₄/PANI hybrid electrocatalyst was produced hydrothermally. The high degree of morphology, surface area, functionality, and crystallinity of this synthesized MnFe₂O₄/PANI hybrid is confirmed by scanning electron microscopy, Brunauer–Emmett–Teller, X-ray diffraction and Fourier transform infrared spectroscopy. The surface area of the MnFe₂O₄/PANI composite is 90.3 m² g^-1. The material's electrochemical properties were then examined within 1 M KOH. The MnFe₂O₄/PANI gives improved electrocatalytic efficacy for OER, with lower overpotential of 247 mV compared to MnFe₂O₄ (373 mV) and lower Tafel slope (38 mV dec^-1) than MnFe₂O₄ (72 mV dec^-1). Furthermore, the electrodes' durability was assessed using cyclic stability and chronoamperometric experiments over 50 h. Thus, all findings confirmed that MnFe₂O₄/PANI vital option for OER which facilitates efficient charge transfer.

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水热合成mnfe2o4包埋聚苯胺纳米复合材料增强OER

化石燃料的过度使用造成了能源消耗和环境问题。因此，开发替代能源至关重要。为此，对水电解进行了详细的研究，以应对环境和能源挑战。催化剂在电化学水分解中起主要作用。本文采用水热法制备了MnFe2O4/PANI杂化电催化剂。通过扫描电子显微镜、brunauer - emmet - teller、x射线衍射和傅里叶变换红外光谱证实了合成的MnFe2O4/PANI杂化物的高形貌、高表面积、高功能性和高结晶度。MnFe2O4/PANI复合材料的比表面积为90.3 m2 g-1。然后在1 M KOH中测试了材料的电化学性能。MnFe2O4/PANI具有较好的OER电催化效果，其过电位比MnFe2O4 （373 mV）低247 mV， Tafel斜率（38 mV dec1）比MnFe2O4 （72 mV dec1）低。此外，通过循环稳定性和超过50小时的时间电流实验来评估电极的耐久性。因此，所有研究结果都证实了MnFe2O4/PANI是OER的重要选择，可以促进有效的电荷转移。

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来源期刊

Journal of the Indian Chemical Society 化学-化学综合

CiteScore

3.50

自引率

7.70%

发文量

492

审稿时长

3-8 weeks

期刊介绍： The Journal of the Indian Chemical Society publishes original, fundamental, theorical, experimental research work of highest quality in all areas of chemistry, biochemistry, medicinal chemistry, electrochemistry, agrochemistry, chemical engineering and technology, food chemistry, environmental chemistry, etc.