Two-Dimensional Molybdenum Diselenide Tuned by Bimetal Co/Ni Nanoparticles for Oxygen Evolution Reaction

ACS Omega
Anna DymerskaEwa Mijowska

Abstract

Herein, we report fabrication of MoSe2 functionalized with bimetal Co/Ni particles, which shows promising electrochemical performance in oxygen and hydrogen evolution reactions (OER and HER) due to its physicochemical properties such as electronic configuration and great electrochemical stability. We propose functionalization with two transition metals, cobalt and nickel, expecting a synergic effect in electrocatalytic activity in a water splitting reaction. These electrocatalytic reactions are essential for efficient electrochemical energy storage. The thin flakes were obtained by exfoliation of bulk molybdenum diselenide. Next, after deposition of metals, precursors were carbonized. Electrochemical data reveal that the presence of Ni and Co particles boosts electrocatalyst performance, providing a great number of active sites due to their conductivity. Interestingly, the material exhibited great evolution potential and good stability in long-term tests.

References

Jun 5, 2013·Angewandte Chemie·Binod Nepal, Siddhartha Das
May 29, 2014·Physical Chemistry Chemical Physics : PCCP·Charlie TsaiJens K Nørskov
Nov 26, 2015·Scientific Reports·Dahyun NamHyeonsik Cheong
Aug 3, 2016·Scientific Reports·Vighter IberiOlga S Ovchinnikova
Jan 8, 2019·Science Advances·Hyungjin KimAli Javey

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Methods Mentioned

BETA
transmission
X-ray
scanning electron microscopy
AFM
electron microscopy

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