One-pot synthesis nickel sulfide/amorphous molybdenum sulfide nanosheets array on nickel foam as a robust oxygen evolution reaction electrocatalyst

Journal Article · Fri Dec 15 04:00:00 EST 2017 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2017.08.014· OSTI ID:22742072

Xu, Yuan-Zi ^[1]; Yuan, Cheng-Zong ^[2]; Chen, Xue-Ping ^[1]

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1. Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026 (China)
2. Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026 (China)

To design highly efficient and low-cost electrocatalysts for oxygen evolution reaction (OER) is a great challenge for electrochemical water splitting. Here we introduce a simple and cost-effective strategy for one-step synthesis of a three-dimensional Ni{sub 3}S{sub 2}/MoS{sub X} (x is close to 3) nanosheets on Ni foam (NF) via a sovelthermal reaction. The electrochemical performance of the Ni{sub 3}S{sub 2}/MoS{sub X} nanosheets on NF has been investigated and exhibits superior OER electrocatalytic activity as well as excellent electrochemical durability. As a novel non-noble-metal OER catalyst operating in basic electrolytes, this 3D cathode exhibits an onset overpotential of as low as 165 mV, a Tafel slope of 67.5 mV dec{sup −1} and remarkable long-term stability. This catalyst maintains its catalytic activity for at least 14 h and only affords 50, 100, and 150 mA cm{sup −2} OER current densities at overpotentials of 215 mV, 265 mV and 305 mV respectively. - Highlights: • The Ni{sub 3}S{sub 2}/MoS{sub X} nanosheets/NF electrode synthesized via a simple and cost-effective sovelthermal reaction. • The Ni{sub 3}S{sub 2}/MoS{sub X} nanosheets were directly grown on the conductive Ni foam with a high surface area, superior electrical conductivity and excellent. mechanical flexibility as an electrode material for oxygen evolution reaction in basic media. • The Ni{sub 3}S{sub 2}/MoS{sub X} nanosheets/NF exhibits superior OER electrocatalytic activity as well as excellent electrochemical durability. - Graphical abstract: The Ni{sub 3}S{sub 2}/MoS{sub X} nanosheets were directly grown on the conductive Ni foam via a one-step sovelthermal reaction, such structure with a high surface area (high density of oxygen-evolution catalytic sites), facilitating conductivity, electron transfer as a high performance and extraordinary duration electrode material for oxygen evolution reaction in basic media. Display Omitted.

• OSTI ID: 22742072
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 256; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CATHODES
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTROCATALYSTS
ELECTROCHEMISTRY
ELECTRON TRANSFER
FOAMS
MOLYBDENUM SULFIDES
NANOSTRUCTURES
NICKEL SULFIDES
OXYGEN ENHANCEMENT RATIO
SERVICE LIFE
SHEETS
SURFACE AREA
SYNTHESIS
WEAR RESISTANCE
ZINC