MoS2-modified porous gas diffusion layer with air-solid-liquid interface for efficient electrocatalytic water splitting

Sui，Chenxi1; Chen，Kai2; Zhao，Liming3; Zhou，Li1; Wang，Qu Quan1,2

2018-08-28

10.1039/c8nr04082f

Nanoscale   影响因子和分区

2040-3364

2040-3372

The formation and adsorption of bubbles on electrodes weaken the efficiency of gas evolution reactions such as the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by hindering proton transfer and consuming nucleation energy. Herein, a triphase electrode was fabricated to address this limitation by immobilizing MoS nanosheets on a porous gas diffusion layer (GDL). This electrode shows a superior HER and OER ratio, high current density and stable working state in electrocatalytic water splitting. Moreover, by lowering the pressure behind the GDL, we further improved the water-splitting rate (the current density was three times higher than that of a bare MoS diphase electrode at -0.37 V for HER and 1.62 V for OER) and stability by eliminating the appearance of bubbles, even under a current density as high as 100 mA cm. Our work manifests the significance of constructing a triphase system for water splitting, and the system is also available for other gas evolution reactions.

SCI ; EI

英语

其他

[2017YFA0303402] ; Natural Science Foundation of Hubei Province[2018CFB572] ; Shandong University[] ; National Natural Science Foundation of China[11674254] ; National Natural Science Foundation of China[91750113] ; Wuhan University[]

WOS:000442614000015

Royal Society of Chemistry

20183505740473

Current density ; Diffusion in gases ; Electrodes ; Layered semiconductors ; Molybdenum compounds

Electricity: Basic Concepts and Phenomena:701.1 ; Physical Chemistry:801.4

2-s2.0-85051950025

Scopus

1.Key Laboratory of Artificial Micro- and Nano-structures, Ministry of Education, School of Physics and Technology, Wuhan University, ,Wuhan,430072,China
2.Institute for Advanced Studies (IAS), Wuhan University, ,Wuhan,430072,China
3.Department of Materials Science and Engineering, Southern University of Science and Technology, ,Shenzhen,518055,China

Sui，Chenxi,Chen，Kai,Zhao，Liming,et al. MoS2-modified porous gas diffusion layer with air-solid-liquid interface for efficient electrocatalytic water splitting[J]. Nanoscale,2018,10(32):15324-15331.

Sui，Chenxi,Chen，Kai,Zhao，Liming,Zhou，Li,&Wang，Qu Quan.(2018).MoS2-modified porous gas diffusion layer with air-solid-liquid interface for efficient electrocatalytic water splitting.Nanoscale,10(32),15324-15331.

Sui，Chenxi,et al."MoS2-modified porous gas diffusion layer with air-solid-liquid interface for efficient electrocatalytic water splitting".Nanoscale 10.32(2018):15324-15331.