K₂PtCl₄-induced structural reconstruction of high-entropy sulfide hollow nanospheres for enhanced hydrogen evolution.
6 affiliations
- 1School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku Tokyo 169-8555 Japan [email protected].
- 2Kagami Memorial Research Institute for Materials Science and Technology, Waseda University 2-8-26 Nishiwaseda, Shinjuku Tokyo 169-0051 Japan.
- 3Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China [email protected].
- 4School of Materials Science and Engineering, University of Science and Technology of China Hefei 230026 China.
- 5Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane QLD 4072 Australia [email protected].
- 6Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan.
Abstract
We report the synthesis of K₂PtCl₄-treated high-entropy sulfide (HES) nanospheres via a two-step liquid-phase synthesis involving solvothermal formation of (Co,Ni,Cu,Zn,Mn)₃S₄ hollow spheres and subsequent K₂PtCl₄ solution treatment. The resulting nanospheres exhibit a well-defined hollow morphology. The K₂PtCl₄ solution treatment induces partial structural reconstruction of the HES framework, producing a Pt-containing amorphous region while retaining part of the crystalline spinel domain. The resulting catalyst also demonstrates excellent catalytic activity for the hydrogen evolution reaction (HER), delivering low overpotentials of 50 mV at 10 mA cm⁻² in 1.0 M KOH and 49 mV at 10 mA cm⁻² in 0.5 M H₂SO₄. It also demonstrates good long-term durability, retaining 71% and 98% of its initial current density after 60 h of continuous operation at constant potentials corresponding to an initial current density of 100 mA cm⁻² under alkaline and acidic conditions, respectively, and maintaining almost constant polarization behavior after 5000 CV cycles under both conditions. These findings highlight the potential of K₂PtCl₄-treated HES as efficient and durable electrocatalysts for sustainable hydrogen production across a wide pH range.
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BibTeX
@article{cui2026k₂ptcl₄induced,
title = {{K₂PtCl₄-induced structural reconstruction of high-entropy sulfide hollow nanospheres for enhanced hydrogen evolution.}},
author = {Yinghao Cui and Wenyang Zhang and Yusuke Yamauchi and Yoshiyuki Sugahara},
journal = {Nanoscale advances},
year = {2026},
month = sep,
doi = {10.1039/d6na00484a},
url = {https://europepmc.org/article/MED/42923124},
note = {CC BY},
}
RIS
TY - JOUR
TI - K₂PtCl₄-induced structural reconstruction of high-entropy sulfide hollow nanospheres for enhanced hydrogen evolution.
AU - Yinghao Cui
AU - Wenyang Zhang
AU - Yusuke Yamauchi
AU - Yoshiyuki Sugahara
PY - 2026
DA - 2026/09/17
JO - Nanoscale advances
DO - 10.1039/d6na00484a
UR - https://europepmc.org/article/MED/42923124
AB - We report the synthesis of K₂PtCl₄-treated high-entropy sulfide (HES) nanospheres via a two-step liquid-phase synthesis involving solvothermal formation of (Co,Ni,Cu,Zn,Mn)₃S₄ hollow spheres and subsequent K₂PtCl₄ solution treatment. The resulting nanospheres exhibit a well-defined hollow morphology. The K₂PtCl₄ solution treatment induces partial structural reconstruction of the HES framework, producing a Pt-containing amorphous region while retaining part of the crystalline spinel domain. The resulting catalyst also demonstrates excellent catalytic activity for the hydrogen evolution reaction (HER), delivering low overpotentials of 50 mV at 10 mA cm⁻² in 1.0 M KOH and 49 mV at 10 mA cm⁻² in 0.5 M H₂SO₄. It also demonstrates good long-term durability, retaining 71% and 98% of its initial current density after 60 h of continuous operation at constant potentials corresponding to an initial current density of 100 mA cm⁻² under alkaline and acidic conditions, respectively, and maintaining almost constant polarization behavior after 5000 CV cycles under both conditions. These findings highlight the potential of K₂PtCl₄-treated HES as efficient and durable electrocatalysts for sustainable hydrogen production across a wide pH range.
SN - 2516-0230
ER -