FeNi2S4-A Potent Bifunctional Efficient Electrocatalyst for the Overall Electrochemical Water Splitting in Alkaline Electrolyte

被引:12
作者
Hegazy, Mohamed Barakat Zakaria [1 ,2 ]
Zander, Judith [3 ,4 ]
Weiss, Morten [3 ]
Simon, Christopher [3 ]
Gerschel, Philipp [1 ]
Sanden, Sebastian A. [1 ]
Smialkowski, Mathias [1 ,5 ]
Tetzlaff, David [1 ,5 ]
Kull, Tobias [1 ]
Marschall, Roland [3 ,4 ]
Apfel, Ulf-Peter [1 ,3 ]
机构
[1] Ruhr Univ Bochum, Inorgan Chem 1, D-44801 Bochum, Germany
[2] Tanta Univ, Fac Sci, Dept Chem, Tanta 31527, Egypt
[3] Univ Bayreuth, Dept Chem, D-95447 Bayreuth, Germany
[4] Univ Bayreuth, Bavarian Ctr Battery Technol BayBatt, D-95447 Bayreuth, Germany
[5] Fraunhofer Inst Environm Safety & Energy Technol, D-46047 Oberhausen, Germany
关键词
electrocatalytic activity; spinel bimetallic sulfides; stability; surface; water electrolysis; OXYGEN EVOLUTION REACTION; X-RAY PHOTOELECTRON; FUEL-CELLS; PENTLANDITE; PYRRHOTITE; NANOSHEETS; SURFACE; AIR;
D O I
10.1002/smll.202311627
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
For a carbon-neutral society, the production of hydrogen as a clean fuel through water electrolysis is currently of great interest. Since water electrolysis is a laborious energetic reaction, it requires high energy to maintain efficient and sustainable production of hydrogen. Catalytic electrodes can reduce the required energy and minimize production costs. In this context, herein, a bifunctional electrocatalyst made from iron nickel sulfide (FeNi2S4 [FNS]) for the overall electrochemical water splitting is introduced. Compared to Fe2NiO4 (FNO), FNS shows a significantly improved performance toward both OER and HER in alkaline electrolytes. At the same time, the FNS electrode exhibits high activity toward the overall electrochemical water splitting, achieving a current density of 10 mA cm(-2) at 1.63 V, which is favourable compared to previously published nonprecious electrocatalysts for overall water splitting. The long-term chronopotentiometry test reveals an activation followed by a subsequent stable overall cell potential at around 2.12 V for 20 h at 100 mA cm(-2).
引用
收藏
页数:10
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