析氧
对偶(语法数字)
电流(流体)
材料科学
电流密度
氧气
兴奋剂
化学
光电子学
物理
电极
物理化学
热力学
电化学
艺术
文学类
有机化学
量子力学
作者
Xueran Shen,Huanjun Li,Yaoyuan Zhang,Tiantian Ma,Qun Li,Qingze Jiao,Yun Zhao,Hansheng Li,Caihong Feng
标识
DOI:10.1016/j.apcatb.2022.121917
摘要
Developing efficient and nonprecious large-current-density based oxygen evolution reaction (OER) electrocatalysts is strongly required for sustainable industrial water splitting. Hence, a unique heterostructure erecting by Mo-doped CoFe layered double hydroxides coating NiCo 2 S 4 nanotube arrays grown on nickel foam (NCS@CFM-LDH/NF) is elaborately demonstrated. It only needs an overpotential of 295/332 mV to achieve current density of 500/1000 mA cm -2 , respectively, with a low Tafel slope of 83.0 mV dec -1 in alkaline media. NCS@CFM-LDH/NF also shows an ultra-long-term stability at 1000 mA cm -2 over 100 h. Its remarkable performance is ascribed to the synergic effect of multi-component and hierarchical structure. Additionally, Theoretical calculations disclose that the doping of molybdenum is beneficial to the adsorption of the *O intermediate, thus promotes OER activity. This study provides an attractive approach to design highly active and durable OER catalysts for industrial application in electrolysis of water. • The unique nanotube arrays NCS@CFM 0.075 -LDH/NF catalyst has been prepared. • NCS@CFM 0.075 -LDH/NF presents good catalytic performance in alkaline media. • The dual electronic regulation effect greatly enhances the OER activity. • The 3D heterostructure provides superhydrophilic and superaerophobic surfaces. • DFT calculations show that the doping of Mo changes the RDS of the OER reaction.
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