Construction of NiCo2S4/Fe2O3 hybrid nanostructure as a highly efficient electrocatalyst for the oxygen evolution reaction

被引:31
作者
Fereja, Shemsu Ligani [1 ,2 ,3 ]
Li, Ping [1 ,2 ]
Zhang, Ziwei [1 ,2 ]
Guo, Jinhan [1 ,2 ]
Fang, Zhongying [1 ,2 ]
Li, Zongjun [1 ]
Chen, Wei [1 ,2 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Wolkite Univ, Coll Nat & Computat Sci, Wolkite 07, Ethiopia
关键词
Bimetallic MOF; Hybrid structure; Water splitting; Electrocatalyst; Oxygen evolution reaction; METAL-ORGANIC-FRAMEWORK; HYDROGEN EVOLUTION; BIFUNCTIONAL ELECTROCATALYSTS; NANOSHEET ARRAYS; CARBON NANOTUBES; NANOPARTICLES; SULFIDE; CLOTH; OXIDE; FOAM;
D O I
10.1016/j.electacta.2021.139793
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Electrocatalytic water splitting is a promising process as it can effectively convert renewable electricity to chemical energy such as hydrogen gas. However, the energy conversion efficiency of water splitting process is fundamentally dependent on the catalytic activity of selected electrocatalyst. In particular, one of the main reasons that hinder the practical application of water splitting system is the sluggish kinetics of oxygen evolution reaction (OER). Hence, earth-abundant elements-based catalysts with excellent OER catalytic performance is significantly important. Herein, MOF-derived NiCo2S4/Fe2O3 hybrid nanostructure grown on carbon cloth (NiCo2S4/Fe2O3@CC) was successfully fabricated as OER catalyst. Benefiting from the merits of unique architecture with hybrid heterostructure grown on carbon cloth, high porosity and abundant active sites, the designed NiCo2S4/Fe2O3@CC demonstrated superior electrocatalytic performance toward the OER. The fabricatedNiCo(2)S(4)/Fe2O3@CC catalyst exhibited very low overpotential of 190 mV to achieve a current density of 10 mA cm(-2) and a small Tafel slope of 45 mV dec(-1). Further-more, the as-fabricated catalyst demostrated remarkable stability. The present work provides an effective method to fabricate novel metal sulfide and metal oxide hybrids for OER catalysis. (c) 2021 Elsevier Ltd. All rights reserved.
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页数:9
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