Advanced Mott-Schottky heterojunction of semi-conductive MoS2 nanoparticles/metallic CoS2 nanotubes as an efficient multifunctional catalyst for urea-water electrolysis

被引:48
作者
Doan, Thi Luu Luyen [1 ]
Nguyen, Dinh Chuong [2 ]
Kang, Kyoungin [3 ]
Ponnusamy, Anusha [3 ]
Eya, Henry I. [4 ]
Dzade, Nelson Y. [4 ]
Kim, Cheol Sang [1 ,3 ,5 ]
Park, Chan Hee [1 ,3 ,5 ]
机构
[1] Jeonbuk Natl Univ, Sch Engn, Div Mech Design Engn, Jeonju 54896, Jeollabuk Do, South Korea
[2] Jeonbuk Natl Univ, Dept Nano Convergence Engn, Jeonju 54896, Jeonbuk, South Korea
[3] Jeonbuk Natl Univ, Grad Sch, Dept Bionanotechnol & Bioconvergence Engn, Jeonju 54896, Jeollabuk Do, South Korea
[4] Penn State Univ, Dept Energy & Mineral Engn, University Pk, PA 16802 USA
[5] Jeonbuk Natl Univ, Grad Sch, Dept Bionanosyst Engn, Jeonju 54896, Jeollabuk Do, South Korea
来源
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 342卷
基金
新加坡国家研究基金会;
关键词
Mott -Schottky heterojunction; MoS2; nanoparticles/CoS2; nanotubes; Multifunctional catalyst; Overall water splitting; Urea electrolysis; BIFUNCTIONAL ELECTROCATALYSTS; HYDROGEN-PRODUCTION; PERFORMANCE; EVOLUTION; CARBON; NETWORKS; ALKALINE; SULFIDE;
D O I
10.1016/j.apcatb.2023.123295
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
Metallic CoS2 has attracted considerable interest for the catalysis of electrochemical reactions; however, its catalytic activity is still lower than that of commercial novel metal-based catalysts. Semiconductive 2H-MoS2 also holds a high capability for catalysis. In this work, a rationally designed Mott-Schottky heterojunction of ultrasmall MoS2 nanoparticles/CoS2 nanotube arrays is constructed via an effective synthetic protocol. Because of the difference in the Fermi level of the metallic CoS2 and semiconducting MoS2, strong Mott-Schottky interaction occurs at their heterointerface to gain equalization, resulting in the optimization of intermediates adsorption energies, thereby favoring the reaction kinetics of hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and urea oxidation reaction (UOR). Consequently, the proposed catalyst yields high current densities at small HER and OER overpotentials or low UOR potentials, small Tafel slopes, and desirable stability, confirming its excellent electrocatalytic activities for these key half-reactions toward significantly boosting water and urea electrolysis.
引用
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页数:17
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