Role of amorphous engineering and cerium doping in NiFe oxyhydroxide for electrocatalytic water oxidation

被引:29
作者
Bai, Jirong [1 ,2 ]
Chen, Changfan [1 ]
Lian, Yuebin [1 ]
Deng, Yaoyao [1 ]
Xiang, Mei [1 ]
Zhou, Quanfa [1 ]
Tang, Yawen [2 ]
Su, Yaqiong [3 ]
机构
[1] Changzhou Inst Technol, Res Ctr Secondary Resources & Environm, Sch Chem Engn & Mat, Changzhou 213022, Peoples R China
[2] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Peoples R China
[3] Xi An Jiao Tong Univ, Univ Shaanxi Prov,Sch Chem, Engn Res Ctr Energy Storage Mat & Devices, Minist Educ,Natl Innovat Platform Ctr Ind Educ Int, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
Ce doping; Amorphous engineering; NiFe oxyhydroxide; Oxygen evolution reaction; OXYGEN EVOLUTION REACTION; NANOSHEETS; STABILITY; EFFICIENT;
D O I
10.1016/j.jcis.2024.02.093
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
Amorphous engineering and atomistic doping provide an effective way to improve the catalytic activity in the oxygen evolution reaction (OER) of transition metal layered double hydroxides. Herein, Cerium (Ce) was introduced into NiFe-based oxyhydroxide using a modified aqueous sol-gel procedure. Ce as an electron acceptor promoted the coupling oxidation of Ni2+/3+ in NiFe oxyhydroxide, and the activated oxyhydroxide showed excellent catalytic activity in OER. The amorphous NiFeCe oxyhydroxide electrocatalyst demonstrated great modified OER catalytic activity under alkaline conditions and excellent cyclic stability, with an overpotential of only 284 mV at 50 mA cm -2, which was significantly better than amorphous NiFe oxyhydroxide and crystalline NiFeCe oxyhydroxide. Theoretical investigations further indicated that the overpotential of the rate -determining step (*OOH deprotonation) decreased from 0.66 to 0.41 V after Ce doping and strong electron interaction, effectively reducing the dependence of proton activity in the solution of OER, and optimizing the adsorption/ desorption process of related oxygen -containing species in the reaction. This work also provides a good reference for optimizing OER activity by using rare -earth -metal induced electronic regulation strategies.
引用
收藏
页码:280 / 286
页数:7
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