Enhanced electrocatalytic activity of the solvothermally synthesized Mesoporous Rhombohedral nickel sulphide

被引:18
作者
Bhardwaj, Rekha [1 ]
Jha, Ranjana [2 ]
Bhushan, Medha [1 ]
Sharma, Reetu [3 ]
机构
[1] Univ Delhi, Netaji Subhas Inst Technol, Dept Phys, Res Lab Energy Syst, New Delhi 110078, India
[2] Netaji Subhas Univ Technol, Dept Phys, Res Lab Energy Syst, New Delhi 110078, India
[3] Univ Delhi, Netaji Subhas Inst Technol, Dept Chem, Res Lab Energy Syst, New Delhi 110078, India
关键词
Nano rods; Cluster beans; Electrocatalytic studies; Areal capacitance; Mesoporous; THIN-FILM; BETA-NIS; ELECTROCHEMICAL PERFORMANCE; PHOTOCATALYTIC ACTIVITY; AQUEOUS-ELECTROLYTE; HYDROTHERMAL GROWTH; HYDROGEN EVOLUTION; CHEMICAL-SYNTHESIS; ENERGY-CONVERSION; HIGHLY EFFICIENT;
D O I
10.1016/j.mssp.2020.105194
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In the present work, Mesoporous Rhombohedral beta-NiS (Nickel Sulphide) was synthesized by a solvothermal route using thiourea as Sulphur source. Rietveld refinement confirms the single phase formation of Rhombohedral beta-NiS. Reaction temperature affects the electro-catalytic, optical and morphology of the synthesized beta-NiS nanoparticles. 1-D nano-rods and cluster beans like structures are observed in FESEM images. At lower tem-perature, energy band gap of the synthesized beta-NiS nanoparticles is found to be 2.75 eV. Carbonaceous free electrodes were used for electrocatalytic studies in 1 M aqueous LiOH electrolyte. Electrocatalytic activity of beta-NiS nanoparticles were studied by cyclic voltammetry technique and electrochemical impedance spectroscopy. During the analysis of cyclic voltammetry technique it was found that the synthesized beta-NiS electrode showed maximum areal capacitance 12.02 F cm(-2) with 83% cyclic stability over 1000 cyclic voltammetry cycles.
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页数:9
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