Facile Synthesis of Medium‐Entropy Metal Sulfides as High‐Efficiency Electrocatalysts toward Oxygen Evolution Reaction

Developing highly efficient and durable electrocatalysts toward oxygen evolution reaction (OER) is an urgent demand to produce clean hydrogen energy. In this study, a series of medium‐entropy metal sulfides (MEMS) of (NiFeCoX)3S4 (where X = Mn, Cr, Zn) are synthesized by a facile one‐pot solvotherma...

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Published in:Advanced functional materials 2023-01, Vol.33 (3), p.n/a
Main Authors: Wu, Lei, Shen, Xiaoping, Ji, Zhenyuan, Yuan, Jiaren, Yang, Shaokang, Zhu, Guoxing, Chen, Lizhi, Kong, Lirong, Zhou, Hongbo
Format: Article
Language:English
Subjects:
Chromium
Clean energy
Electrocatalysts
Entropy
Hydrogen-based energy
Iron compounds
Materials science
medium‐entropy metal sulfides
Metal sulfides
molecular precursor
Nickel compounds
Oxygen evolution reactions
Synergistic effect
synergistic effects
Zinc
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Summary:Developing highly efficient and durable electrocatalysts toward oxygen evolution reaction (OER) is an urgent demand to produce clean hydrogen energy. In this study, a series of medium‐entropy metal sulfides (MEMS) of (NiFeCoX)3S4 (where X = Mn, Cr, Zn) are synthesized by a facile one‐pot solvothermal strategy using molecular precursors. Benefiting from the multiple‐metal synergistic effect and the low crystallinity, these MEMS show significantly enhanced electrocatalytic OER activity compared with the binary‐metal (NiFe)3S4 and ternary‐metal (NiFeCo)3S4 counterparts. Especially, (NiFeCoMn)3S4 delivers a low overpotential of 289 mV at 10 mA cm−2, a decent Tafel slope of 75.6 mV dec−1 and robust catalytic stability in alkaline medium, outperforming the costly IrO2 benchmark electrocatalyst and the majority of the reported metal sulfide‐based electrocatalysts until now. These MEMS with facile synthesis and excellent electrocatalytic performance bring a great opportunity to design desirable electrocatalysts for practical application. Medium‐entropy metal sulfides (MEMS) of (NiFeCoX)3S4 (where X = Mn, Cr, Zn) are synthesized via a facile one‐pot solvothermal method using diethyldithiocarbamate complexes as molecular precursors. Benefiting from multiple‐metal synergistic effect and low crystallinity, these MEMS display remarkably enhanced electrocatalytic oxygen evolution reaction performance as compared to the corresponding ternary‐NiFeCo and binary‐NiFe sulfides, and even outperform the costly IrO2 benchmark electrocatalyst.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202208170