深共晶溶剂
塔菲尔方程
电化学
过电位
高锰酸钾
材料科学
化学工程
三元运算
纳米结构
溶剂
超级电容器
共晶体系
无机化学
化学
纳米技术
电极
物理化学
有机化学
冶金
合金
计算机科学
工程类
程序设计语言
作者
Anita Samage,K. Pramoda,Mahaveer Halakarni,Nataraj Sanna Kotrappanavar
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-02-06
卷期号:6 (4): 2412-2422
被引量:5
标识
DOI:10.1021/acsaem.2c03729
摘要
Here, a ternary deep eutectic solvent (DES) is employed as the reaction medium, reducing agent, template, and source for the preparation of cobalt manganese oxide (CoMnO) at room temperature. The hydrogen-bonding interaction between DES and manganese precursors resulted in a rapid conversion of CoMnO nanostructures, and the process was well controlled with the addition of water, which eventually reduced the bonding interaction between the formed nanostructures. The reaction between DES and potassium permanganate is carried out at different time intervals (1, 10, 30, 45, 60 min, 1.5, 2, 4, and 12 h) before the addition of water. With varying reaction times, the morphology, pore structure, surface area, and electrochemical properties of the synthesized CoMnO structures also vary. The highest specific capacitance of 242 F g–1 at 0.1 A g–1 is accomplished using CoMnO nanostructures, where KMnO4 and ternary DES reacted for 4 h. The CoMnO nanostructures prepared by the DES route also show excellent electrochemical stability with 97% initial capacitance retention at 10 A g–1 over 10 000 charge/discharge cycles. Further, the CoMnO-60 min sample shows outstanding electrochemical OER activity with 300 mV overpotential to obtain a current density of 10 mA cm–2 and a Tafel slope value of 73 mV dec–1.
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