Rational Engineering CoxOy Nanosheets via Phosphorous and Sulfur Dual-Coupling for Enhancing Water Splitting and Zn-Air Battery

被引:58
作者
Doan, Thi Luu Luyen [1 ]
Tran, Duy Thanh [1 ]
Nguyen, Dinh Chuong [1 ]
Kim, Do Hwan [2 ]
Kim, Nam Hoon [1 ]
Lee, Joong Hee [1 ,3 ]
机构
[1] Jeonbuk Natl Univ, Dept Nano Convergence Engn, Jeonju 54896, Jeonbuk, South Korea
[2] Jeonbuk Natl Univ, Div Sci Educ, Jeonju 54896, Jeonbuk, South Korea
[3] Jeonbuk Natl Univ, Dept Polymer Nano Sci Technol, Carbon Composite Res Ctr, Jeonju 54896, Jeonbuk, South Korea
基金
新加坡国家研究基金会;
关键词
core-shell nanostructures; multifunctional catalysts; P; S dual-doping effects; water splitting; Zn-air battery; BIFUNCTIONAL OXYGEN ELECTROCATALYST; DOUBLE-HYDROXIDE NANOSHEETS; HYDROGEN EVOLUTION; HIGHLY EFFICIENT; CARBON NANOSHEETS; MESOPOROUS CO3O4; NANOWIRE ARRAYS; POROUS CARBON; COBALT OXIDE; PERFORMANCE;
D O I
10.1002/adfm.202007822
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Herein, an efficient multifunctional catalyst based on phosphorus and sulfur dual-doped cobalt oxide nanosheets supported by Cu@CuS nanowires is developed for water splitting and Zn-air batteries. The formation of such a unique heterostructure not only enhances the number and type of electroactive sites, but also leads to modulated electronic structure, which produces reasonable adsorption energy toward the reactant, thereby improving electrocatalytic efficiency. The catalyst demonstrates small overpotentials of 116 and 280 mA cm(-2) to achieve 10 mA cm(-2) for hydrogen and oxygen evolution, respectively. As a result, a developed electrolyzer displays a cell voltage of 1.52 V at 10 mA cm(-2) and long-term stability with a current response of 92.3% after operating for 30 h. Moreover, using such a catalyst in the fabrication of a Zn-air battery also leads to a cell voltage of 1.383 V, along with a power density of 130 mW cm(-2) at 220 mA cm(-2).
引用
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页数:16
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