Intercalation of g-C3N4/Ag2S heterostructure on boronized Ni-MOF for enhanced water splitting and energy storage applications

被引:1
作者
John, G. [1 ]
Susikumar, T. [1 ]
Navaneethan, M. [1 ,2 ]
Jesuraj, P. Justin [1 ,3 ]
机构
[1] SRM Inst Sci & Technol, Ctr Excellence Mat & Adv Technol CeMAT, Dept Phys & Nanotechnol, Kattankulathur 603203, India
[2] SRM Inst Sci & Technol, Fac Engn & Technol, Nanotechnol Res Ctr NRC, Kattankulathur 603203, India
[3] Dongguk Univ, Dept Phys, Seoul 04620, South Korea
关键词
Boronized Ni-MOF; Graphitic carbon nitride; Silver sulfide; Heterostructure; Bifunctional catalyst; Supercapacitor; OXYGEN REDUCTION; ELECTROCATALYSTS; EFFICIENT; SURFACE;
D O I
10.1016/j.electacta.2024.145258
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The increasing global demand for energy conversion and storage technologies including water electrolysis, fuel cells, batteries & supercapacitors depend critically on the performance of their electrode components. Metal Organic Frameworks (MOFs), particularly Nickel Zeolite Imidazole Frameworks (Ni-ZIF) have drawn significant attention due to their greater electrocatalytic performance. Still, their restricted active sites & stability hinder their broader implementation in alkaline/saline water electrolysis & supercapacitor applications. Here, we are reporting the intercalation of heterostructure consisting of silver sulfide (Ag2S)/graphitic carbon nitride (g-C3N4) on Boronized Ni-ZIF (B:NZ) for empowered alkaline/saline water splitting and supercapacitor applications. These heterostructure addition over Boronized Ni-ZIF demonstrated minimal overpotentials for the oxygen evolution reaction (OER) (324 mV at 10.0 mA cm-2) and the hydrogen evolution reaction (HER) (78 mV at 10.0 mA cm-2) in alkaline medium (1 M KOH). The observed improvement in activity is ascribed to the decreased charge transfer resistance (Rct) & the augmented electrochemical active surface area (ECSA). Furthermore, Ag2S/gC3N4/Boronized Ni-ZIF exhibited high specific capacitances of 1076.6 F/g and areal capacitance of 2584 F/cm2 at 0.50 A g-1 in supercapacitor applications. The incorporation of the g-C3N4 layer has enhanced the surface area and roughness facilitating stronger adhesion between hybrid layers which in turn resulted in prolonged stability exceeding 20 h in water splitting and 86 % retention in supercapacitor application.
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页数:10
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