Tellurium-Incorporated Nickel-Cobalt Layered Double Hydroxide and Its Oxygen Evolution Reaction

被引:5
|
作者
Lee, Jung-Il [1 ,2 ]
Chae, Hui Ra [1 ]
Ryu, Jeong Ho [1 ,2 ]
机构
[1] Korea Natl Univ Transportat, Dept Mat Sci & Engn, Chungbuk 27469, South Korea
[2] Korea Natl Univ Transportat, Energy Fus Technol Lab, Chungbuk 27469, South Korea
来源
基金
新加坡国家研究基金会;
关键词
electrocatalyst; oxygen evolution reaction; tellurium; layered double hydroxide; nickel foam; ELECTROCATALYSTS; PERFORMANCE; PHOTOCATALYSTS; NANOSHEETS;
D O I
10.3365/KJMM.2021.59.7.491
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Transition-metal-based layered double hydroxides (LDHs) have attracted substantial attention as highly efficient oxygen evolution reaction (OER) catalysts because they are earth-abundant, low-cost, and environmentally friendly materials with favorable adsorption/desorption energies for intermittent reactants. However, the application of these LDHs as high-performance electrocatalysts is often hindered by their relatively sluggish electronic transport kinetics resulting from their intrinsically low conductivity. Here, we report the effects of incorporating a metalloid into transition metal LDHs on their electrocatalytic activity. In this study, Te-incorporated NiCo LDH (chi Te-NiCo LDH) was grown on a three-dimensional porous nickel foam (NF) using a facile solvothermal method with chi = 0.2, 0.4, 0.6 and 0.8. The crystal structure and surface nanostructure were investigated by X-ray diffraction and field-emission scanning electron microscopy. A homogeneous nanosheet structure on the NF was clearly observed for the NiCo LDH and chi Te-NiCo (chi = 0.2, 0.4, 0.6) LDHs. However, irregular and collapsed nanostructures were found on the surface of the NF when the Te precursor ratio (chi) exceeded 0.6. The electrocatalytic OER properties were analyzed by linear sweep voltammetry and electrochemical impedance spectroscopy. The amount of Te used in the electrocatalytic reaction was found to play a crucial role in improving the catalytic activity. The optimum Te amount (chi) introduced into the NiCo LDH is discussed with respect to the OER performance.
引用
收藏
页码:491 / 498
页数:8
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