Co-doped 1T′/T phase dominated MoS1+XSe1+Y alloy nanosheets as bifunctional electrocatalyst for overall water splitting

Zhou, Qiulan1; Luo, Xiaohu1; Liu, Zhen1; Li, Shuyi1; Nan, Yanxia1; Deng, Haoyun1; Ma, Yaping2; Xu, Weijian1

2020

10.1016/j.apsusc.2020.145828

APPLIED SURFACE SCIENCE   影响因子和分区

0169-4332

1873-5584

The electrocatalytic overall water splitting is currently regarded as an efficient method for reservation and conversion of sustainable energy sources. The earth-abundant transition-metal chalcogenides (TMCs) possess unique properties to realize hydrogen evolution reaction (HER), but the semiconductor 2H phase behaves a medial activity for HER and even worse performance for oxygen evolution reaction (OER). To date, developing the efficient and bifunctional TMCs electrocatalyst is an attractive but difficult task. Herein, Co-doped 1T′/T phase dominated MoS1+XSe1+Y alloy (Co-MoS1+XSe1+Y) nanosheets electrocatalysts were synthesized by a one-step facial hydrothermal method. Meanwhile, the crystal structures and element composition of the Co-MoS1+XSe1+Y were determined by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Importantly, the as-prepared catalysts Co-MoS1+XSe1+Y with the atomic ratio of Co: Mo = 1: 5 (Co-MoS1+XSe1+Y1-5) shows superior electrochemical activity, achieving current density (j) of 10 mA cm⁻² at small overpotentials of 119 mV and 280 mV for HER and OER in 1.0 M KOH, respectively. Moreover, applying the bifunctional electrode in an alkaline water electrolytic cell allows a high-efficiency electrocatalyst with only 1.60 V at j = 10 mA cm⁻², which could be practical in electrocatalytic overall water splitting reaction devices.
© 2020

Co-doped MoS1+xSe1+Y alloy Electrocatalyst Overall water splitting Hydrogen evolution reaction Oxygen evolution reaction

EI ; SCI

英语

通讯

China National Petroleum Corporation[219012-3] ; [[2018]35] ; Hunan University[] ; State Key Laboratory of Chemo/Biosensing and Chemometrics[]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter

WOS:000523184600015

Elsevier B.V.

20200808207429

Electrocatalysts ; High resolution transmission electron microscopy ; Inorganic compounds ; Nanosheets ; Oxygen evolution reaction ; Potassium hydroxide ; Transition metals ; X ray photoelectron spectroscopy

Metallurgy and Metallography:531 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2 ; Solid State Physics:933

MATERIALS SCIENCE

EV Compendex

1.College of Chemistry and Chemical Engineering, Hunan University, Changsha; 410082, China
2.Department of Physics, Southern University of Science and Technology, Shenzhen; 518055, China

Zhou, Qiulan,Luo, Xiaohu,Liu, Zhen,et al. Co-doped 1T′/T phase dominated MoS1+XSe1+Y alloy nanosheets as bifunctional electrocatalyst for overall water splitting[J]. APPLIED SURFACE SCIENCE,2020,513.

Zhou, Qiulan.,Luo, Xiaohu.,Liu, Zhen.,Li, Shuyi.,Nan, Yanxia.,...&Xu, Weijian.(2020).Co-doped 1T′/T phase dominated MoS1+XSe1+Y alloy nanosheets as bifunctional electrocatalyst for overall water splitting.APPLIED SURFACE SCIENCE,513.

Zhou, Qiulan,et al."Co-doped 1T′/T phase dominated MoS1+XSe1+Y alloy nanosheets as bifunctional electrocatalyst for overall water splitting".APPLIED SURFACE SCIENCE 513(2020).