Graphene/MoS2/FeCoNi(OH)x and Graphene/MoS2/FeCoNiPx multilayer-stacked vertical nanosheets on carbon fibers for highly efficient overall water splitting

被引：389

作者：

Ji, Xixi ^{[1
]}

Lin, Yanhong ^{[1
]}

Zeng, Jie ^{[1
]}

Ren, Zhonghua ^{[1
]}

Lin, Zijia ^{[1
]}

Mu, Yongbiao ^{[1
]}

Qiu, Yejun ^{[1
]}

Yu, Jie ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen Key Lab Adv Mat, Shenzhen Engn Lab Supercapacitor Mat, Shenzhen, Peoples R China

来源：

NATURE COMMUNICATIONS | 2021年 / 12卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1038/s41467-021-21742-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Development of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH)(x)) are successively grown on carbon fibers (CF/VGSs/MoS2/FeCoNi(OH)(x)). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241mV to attain 500 and 1000mAcm(-2) and small Tafel slope of 29.2mV dec(-1). Theoretical calculation indicates that compositing of FeCoNi(OH)(x) with MoS2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS2/FeCoNi(OH)(x) anode for overall water splitting, which generates a current density of 100mAcm(-2) at 1.59V with excellent stability over 100h. Our highly efficient catalysts have great prospect for water electrolysis. While water-splitting electrocatalysis offers a renewable means for carbon-neutral energy production, it is a challenge to design efficient, active, and stable catalysts. Here, authors prepare multilayer composite nanosheet materials as bifunctional water-splitting electrocatalysts.

引用

页数：13

共 65 条

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