Heterointerface of vanadium telluride and zinc iron telluride nanosheets for highly efficient hydrogen production via water and urea electrolysis

被引:34
作者
Gautam, Jagadis [1 ,2 ]
Chanda, Debabrata [1 ,2 ]
Meshesha, Mikiyas Mekete [1 ,2 ]
Jang, Seok Gwon [1 ,2 ]
Yang, Bee Lyong [1 ,2 ]
机构
[1] Kumoh Natl Inst Technol, Sch Mat Sci & Engn, 61 Daehak Ro, Gumi Si 39177, Gyeongsangbug D, South Korea
[2] GHS Green H2 Syst Co Ltd, Gumi, South Korea
基金
新加坡国家研究基金会;
关键词
Vanadium telluride; Zinc iron telluride; Oxygen evolution reaction; Hydrogen evolution reaction; Urea electrolysis; OXYGEN EVOLUTION; BIFUNCTIONAL ELECTROCATALYSTS; NANOTUBE ARRAYS; NICKEL FOAM; HETEROSTRUCTURES; HYDROXIDE; SURFACE;
D O I
10.1016/j.cej.2023.143535
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Interface design is a promising strategy for electrocatalysis to optimize charge transfer ability and active sites of a catalyst. Herein, interfacially coupled vanadium telluride and zinc iron telluride nanosheets are synthesized on nickel foam (VTe2@ZnFeTe/NF) by a facile hydrothermal method, which furnishes low overpotentials of 119/ 217 mV for the hydrogen evolution reaction (HER) and 240/300 mV for the oxygen evolution reaction (OER) at 20/50 mA cm-2 in potassium hydroxide. The alkaline and urea electrolyzer formed by VTe2@ZnFeTe/NF re-quires an operating voltage of 1.58 V and 1.46 V to yield a current density of 10 mA cm-2 respectively. Density functional theory analysis reveals that the superb activity of VTe2@ZnFeTe/NF is related to its optimal adsorption free energy, extended electroactive centers, excellent charge transfer ability, and reasonable density of states near the Fermi level. These findings provide new insights for the design of transition metal telluride heterointerfaces as catalysts for water and urea electrolyzers.
引用
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页数:13
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