蘭亞乾教授課題組在NANOSCALE發(fā)表研究論文
Polyoxometalate precursors for precisely controlled synthesis of bimetallic sulfide heterostructure through nucleation-doping competition
Tang, YJ (Tang, Yu-Jia)[ 1 ] ; Zhang, AM (Zhang, A-Man)[ 1 ] ; Zhu, HJ (Zhu, Hong-Jing)[ 1 ] ; Dong, LZ (Dong, Long-Zhang)[ 1 ] ; Wang, XL (Wang, Xiao-Li)[ 1 ] ; Li, SL (Li, Shun-Li)[ 1 ] ; Han, M (Han, Min)[ 1 ] ; Xu, XX (Xu, Xiang-Xin)[ 1 ] ; Lan, YQ (Lan, Ya-Qian)[ 1 ]*（蘭亞乾）
[ 1 ] Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China
NANOSCALE,201805,10(18),8404-8412
Molybdenum disulfide (MoS2)-based bimetallic sulfides have drawn increasing research attention because of their unique structures and properties. Herein, a one-pot hydrothermal synthesis method is proposed to grow a series of bimetallic sulfides on carbon cloth (M-Mo-S/CC, M = Co, Ni, Fe) using Anderson-type polyoxometalates (POMs) as bimetallic sources for the first time. An ideal model of M-Mo-S/CC was used to study the growth process through the nucleation- doping competition mechanism. It is proved for the first time that M-Mo-S/CC possess certain compositions of bimetallic sulfides rather than metal doped MoS2 structures because the nucleation reaction is predominant in the nucleation-doping competition. Moreover, the nucleation rates of different metals can be compared to study the different morphologies of M-Mo-S/CC because Anderson-type POMs have fixed bimetal proportions and precise structures. Co-Mo-S and Ni-Mo-S show spherical heterostructures with CoS2 or NiS mainly inside and interconnected MoS2 nanosheets outside, while Fe-Mo-S exhibits uniform nanosheet morphology without stacking. As electrodes for alkaline water electrolysis, M-Mo-S/CC with different compositions and morphologies exhibit a variety of activities. Particularly, among the M-Mo-S/CC samples, Co-Mo-S/CC achieves the best performance for hydrogen evolution reaction, oxygen evolution reaction and overall water splitting. This study presents a facile strategy of using POMs as bimetallic precursors for studying the growth mechanism as well as the water electrolysis performances of MoS2-based bimetallic sulfides.
文章鏈接：
http://pubs.rsc.org/en/Content/ArticleLanding/2018/NR/C8NR00925B#!divAbstract
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