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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 907卷

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.

引用

页数：11