MoS2核壳球上氧掺杂的动力学调制及其电化学分解水效应
Dynamical modulation and electrochemical water splitting effect of oxygen doped onto MoS2 core-shell spheres
巩飞龙 1刘静轩 1刘梦梦 1许三魁 2李峰3
作者信息
- 1. 郑州轻工业大学河南省表界面科学重点实验室,郑州 450002
- 2. 河南工业大学材料学院,郑州 450002
- 3. 郑州轻工业大学河南省表界面科学重点实验室,郑州 450002;美洲先进纳米技术有限公司,休斯敦 77459
- 折叠
摘要
在氩气气氛中900℃煅烧前驱物MoS2核壳超级球得到MoS2核壳球.在升温速率为20、10、5、2 ℃·min1时,MoS2核壳球上氧掺杂量分别从前驱物的23.1％降低到17.6％、10.8％、5.5％、6.2％.结果表明较低的升温速率可以导致更低的氧掺杂量.基于前驱物特殊的准分子超晶格结构,提出了原位阴离子交换反应机理,以深入理解MoS2核壳球上氧掺杂的动力学调制机理.电化学性能研究表明通过调制氧掺杂量可以有效改善MoS2核壳球电化学分解水的性能.
Abstract
Monodispersed MoS2 core-shell spheres were produced by annealing precursor MoS2 core-shell super-spheres at 900 ℃ in Ar.Simultaneously,O-doping amount(atomic fraction)can be tuned from 23.1％of precursor to 17.6％,10.8％,5.5％,and 6.2％of as-prepared materials by regulating the heating rate of 20,10,5,and 2 ℃·min-1,respectively.The lower rate results in a lower amount of O doped onto MoS2 core-shell spheres.Based on the special quasi-molecular superlattices of precursors,an in-situ anion exchange reaction mechanism was proposed to under-stand the dynamical modulation of O-doping.The study on the electrochemical properties of the materials demon-strates that their electrochemical performance in splitting water can be improved by tuning the O-doping amount.
关键词
MoS2/核壳球/氧掺杂/动力学调制/电化学性能/分解水Key words
MoS2/core-shell sphere/O-doped/dynamical modulation/electrochemical property/water splitting引用本文复制引用
基金项目
郑州轻工业大学博士基金(2018BSJJ027)
国家自然科学基金(21771166)
国家自然科学基金(1704157)
出版年
2024
NETL
NSTL
万方数据