Phosphorus co-doped reduced graphene oxide embedded flower-like CoS/CoS2 heterostructure as an efficient electrocatalyst for hydrogen evolution reaction in acidic media

被引:21
|
作者
Balaji, Dhandapani [1 ]
Madhavan, Jagannathan [1 ]
Preeyanghaa, Mani [2 ,3 ]
Hussien, Mohamed [4 ,5 ]
Selvaraj, Manickam [4 ]
Murugesan, Sepperumal [6 ]
Neppolian, Bernaurdshaw [2 ,3 ]
机构
[1] Thiruvalluvar Univ, Dept Chem, Solar Energy Lab, Vellore 632115, Tamil Nadu, India
[2] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Chennai 603203, Tamil Nadu, India
[3] SRM Inst Sci & Technol, Dept Chem, Chennai 603203, Tamil Nadu, India
[4] King Khalid Univ, Fac Sci, Dept Chem, Abha 61413, Saudi Arabia
[5] Agr Res Ctr, Pesticide Formulat Dept, Cent Agr Pesticide Lab, Giza 12618, Egypt
[6] Madurai Kamaraj Univ, Sch Chem, Dept Inorgan Chem, Madurai 625021, Tamil Nadu, India
关键词
P-incorporated rGO-CoS/CoS2; Hydrothermal method; Acid electrolyte; Electrocatalyst; Hydrogen evolution reaction; PT-FREE ELECTROCATALYST; HIGH-PERFORMANCE; CARBON CLOTH; NANOSHEETS; NITROGEN; ALKALINE; ELECTRODE; COMPOSITE; SELENIZATION; NANOHYBRID;
D O I
10.1016/j.jallcom.2022.164506
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The electrochemical efficacy of an electrocatalyst can be improved by an elaborate surface modification. In this study, phosphorus co-doped reduced graphene oxide embedded (rGO) flower like CoS/CoS2 hetero-structures have been prepared, via one step hydrothermal process, by taking different mole ratio of phosphorus source for excellent hydrogen evolution reaction (HER) in acid solution. The as-fabricated catalysts are studied by XRD, FT-IR, XPS, SEM, EDS, and HR-TEM analyses. The rGO-CoS/CoS2 @P5 (5 mmol) catalyst exhibits a superior catalytic behavior for HER with a less overpotential (148 mV), low Tafel slope (44 mV dec(-1)) and enhanced cyclic durability (1000 cycles) in acid condition in comparison with other composition. The synergetic effect of hetero-interface and rapid charge transfer through rGO on the active sites of CoS/CoS2 have improved the HER efficiency. This study demonstrated that the component of rGO and P-incorporation on CoS/CoS2 interface offered an achievable yet easy strategy to synthesize platinum (Pt) free metal-based heterostructured catalyst as the favorable electrode material in sustainable energy applications. (C) 2022 Elsevier B.V. All rights reserved.
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页数:11
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