High-Entropy Metal Sulfide Nanoparticles Promise High-Performance Oxygen Evolution Reaction

Cui, Mingjin; Yang, Chunpeng; Li, Boyang; Dong, Qi; Wu, Meiling; Hwang, Sooyeon; Xie, Hua; Wang, Xizheng; Wang, Guofeng; Hu, Liangbing

doi:10.1002/aenm.202002887

DOE OSTI · 1760637

High-Entropy Metal Sulfide Nanoparticles Promise High-Performance Oxygen Evolution Reaction

Cui, Mingjin·Yang, Chunpeng·Li, Boyang·Dong, Qi·Wu, Meiling·Hwang, Sooyeon·Xie, Hua·Wang, Xizheng·Wang, Guofeng·Hu, Liangbing

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Abstract

Transition metal sulfide with a multi-elemental nature represents a class of promising catalysts for oxygen evolution reaction (OER) owing to its good catalytic activity. However, its synthesis remains a grand challenge due to the thermodynamic immiscibility of the constituent multimetallic elements in a sulfide structure. Herein, we for the first time report a high-entropy metal sulfide (HEMS, i.e., (CrMnFeCoNi)Sx) solid solution nanoparticles. Computational and X-ray photoelectron spectroscopy analysis suggest that the (CrMnFeCoNi)S x exhibits a synergistic effect among metal atoms that leads to desired electronic states to enhance OER activity. The (CrMnFeCoNi)Sx nanoparticles showed one of the best activities (low overpotential 295 mV at 100 mA cm -2 in 1 M KOH solution) and good durability (only slight polarization after 10 hours by chronopotentiometry) compared with the unary, binary, ternary, and quaternary sulfide counterparts. This work opens up a new synthesis paradigm for high-entropy compound nanoparticles for highly efficient electrocatalysis applications.

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25 ENERGY STORAGE Catalytic stability High-entropy Oxygen evolution reaction Synergistic effect Transition metal sulfides nanoparticles

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Cui, Mingjin, Yang, Chunpeng, Li, Boyang, Dong, Qi, Wu, Meiling, Hwang, Sooyeon, Xie, Hua, Wang, Xizheng, Wang, Guofeng, Hu, Liangbing. 2020-11-30. High-Entropy Metal Sulfide Nanoparticles Promise High-Performance Oxygen Evolution Reaction. https://doi.org/10.1002/aenm.202002887

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