High-Entropy Sulfides as Highly Effective Catalysts for the Oxygen Evolution Reaction

Ling Lin; Ziming Ding; Guruprakash Karkera; Thomas Diemant; Mohana V. Kante; Daisy Agrawal; Horst Hahn; Jasmin Aghassi-Hagmann; Maximilian Fichtner; Ben Breitung; Simon Schweidler

doi:10.1002/sstr.202300012

High-Entropy Sulfides as Highly Effective Catalysts for the Oxygen Evolution Reaction

Ling Lin
, Ziming Ding
, Guruprakash Karkera
, Thomas Diemant
, Mohana V. Kante
, Daisy Agrawal
, Horst Hahn
, Jasmin Aghassi-Hagmann
, Maximilian Fichtner
, Ben Breitung
, Simon Schweidler

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

With respect to efficient use of diminishing or harder to reach energy resources, the catalysis of processes that will otherwise require high overpotentials is a very important application in today's world. As a newly developed class of materials, high-entropy sulfides (HESs) are promising electrocatalysts for a variety of different reactions. In this report, HESs containing five or six transition metals are synthesized in a one-step mechanochemical process. Seven HESs of Pnma (M:S≈1:1) and three Pa-3 (M:S = 1:2) structures are investigated as electrocatalysts for the oxygen evolution reaction (OER). The performances and properties of the HESs with different compositions and structures are compared with each other and with commercial IrO₂ as reference material, in terms of OER overpotential, Tafel slope, electrochemically active surface area, ionic conductivity, and durability. The structural and chemical properties of these HESs are determined by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive X-ray spectroscopy. Most of the HESs show excellent and promising performance as OER electrocatalysts under alkaline conditions, and outperform the reference OER catalyst IrO₂.

Original language	English
Article number	2300012
Journal	Small Structures
Volume	4
Issue number	9
DOIs	https://doi.org/10.1002/sstr.202300012
State	Published - Sep 2023
Externally published	Yes

Funding

L.L. acknowledges financial support from the China Scholarship Council (CSC). S.S. and B.B. acknowledge the support from EPISTORE and EnABLES, projects funded by the European Union's Horizon 2020 research and innovation program under grant agreement nos. 101017709 and 730957, respectively. Z.D. acknowledge the Karlsruhe Nano Micro Facility at Karlsruhe Institute of Technology for providing TEM access. G.K. and M.F. gratefully acknowledge financial support by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy, EXC 2154, project number 390874152. Financial support by Deutsche Forschungsgemeinschaft is acknowledged by HH (HA 1344/45‐1) and (HA 1344/43‐2). L.L. acknowledges financial support from the China Scholarship Council (CSC). S.S. and B.B. acknowledge the support from EPISTORE and EnABLES, projects funded by the European Union's Horizon 2020 research and innovation program under grant agreement nos. 101017709 and 730957, respectively. Z.D. acknowledge the Karlsruhe Nano Micro Facility at Karlsruhe Institute of Technology for providing TEM access. G.K. and M.F. gratefully acknowledge financial support by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy, EXC 2154, project number 390874152. Financial support by Deutsche Forschungsgemeinschaft is acknowledged by HH (HA 1344/45-1) and (HA 1344/43-2). Open Access funding enabled and organized by Projekt DEAL.

Keywords

catalysts
high-entropy materials
high-entropy sulfides
oxygen evolution reaction

Access to Document

10.1002/sstr.202300012

Cite this

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title = "High-Entropy Sulfides as Highly Effective Catalysts for the Oxygen Evolution Reaction",

abstract = "With respect to efficient use of diminishing or harder to reach energy resources, the catalysis of processes that will otherwise require high overpotentials is a very important application in today's world. As a newly developed class of materials, high-entropy sulfides (HESs) are promising electrocatalysts for a variety of different reactions. In this report, HESs containing five or six transition metals are synthesized in a one-step mechanochemical process. Seven HESs of Pnma (M:S≈1:1) and three Pa-3 (M:S = 1:2) structures are investigated as electrocatalysts for the oxygen evolution reaction (OER). The performances and properties of the HESs with different compositions and structures are compared with each other and with commercial IrO2 as reference material, in terms of OER overpotential, Tafel slope, electrochemically active surface area, ionic conductivity, and durability. The structural and chemical properties of these HESs are determined by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive X-ray spectroscopy. Most of the HESs show excellent and promising performance as OER electrocatalysts under alkaline conditions, and outperform the reference OER catalyst IrO2.",

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author = "Ling Lin and Ziming Ding and Guruprakash Karkera and Thomas Diemant and Kante, \{Mohana V.\} and Daisy Agrawal and Horst Hahn and Jasmin Aghassi-Hagmann and Maximilian Fichtner and Ben Breitung and Simon Schweidler",

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AU - Lin, Ling

AU - Ding, Ziming

AU - Karkera, Guruprakash

AU - Diemant, Thomas

AU - Kante, Mohana V.

AU - Agrawal, Daisy

AU - Hahn, Horst

AU - Aghassi-Hagmann, Jasmin

AU - Fichtner, Maximilian

AU - Breitung, Ben

AU - Schweidler, Simon

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AB - With respect to efficient use of diminishing or harder to reach energy resources, the catalysis of processes that will otherwise require high overpotentials is a very important application in today's world. As a newly developed class of materials, high-entropy sulfides (HESs) are promising electrocatalysts for a variety of different reactions. In this report, HESs containing five or six transition metals are synthesized in a one-step mechanochemical process. Seven HESs of Pnma (M:S≈1:1) and three Pa-3 (M:S = 1:2) structures are investigated as electrocatalysts for the oxygen evolution reaction (OER). The performances and properties of the HESs with different compositions and structures are compared with each other and with commercial IrO2 as reference material, in terms of OER overpotential, Tafel slope, electrochemically active surface area, ionic conductivity, and durability. The structural and chemical properties of these HESs are determined by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive X-ray spectroscopy. Most of the HESs show excellent and promising performance as OER electrocatalysts under alkaline conditions, and outperform the reference OER catalyst IrO2.

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KW - high-entropy sulfides

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High-Entropy Sulfides as Highly Effective Catalysts for the Oxygen Evolution Reaction

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