This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessFeature PaperArticle Facile Aqueous Synthesis of High-Entropy Metal Sulfides for Sulfion Oxidation-Assisted Energy-Saving Hydrogen Production by Linwei Jiang Linwei Jiang Scilit Preprints.org Google Scholar 1, Poh Lin Lau Poh Lin Lau Scilit Preprints.org Google Scholar 1, Huaiyuan Kang Huaiyuan Kang Scilit Preprints.org Google Scholar 1, Bosong Duan Bosong Duan Scilit Preprints.org Google Scholar 1, Aixiang Wang Aixiang Wang Scilit Preprints.org Google Scholar 2,*, Hsien-Yi Hsu Hsien-Yi Hsu Scilit Preprints.org Google Scholar 3,*, Zongyou Yin Zongyou Yin Scilit Preprints.org Google Scholar 4 Guohua Jia Guohua Jia Scilit Preprints.org Google Scholar 1,* 1 School of Molecular and Life Sciences, Curtin University, Perth, WA 6102, Australia 2 School of Chemistry and Chemical Engineering, Linyi University, Linyi 276005, China 3 School of Energy and Environment & Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 999077, China 4 Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia * Authors to whom correspondence should be addressed. Catalysts 2026, 16(6), 525; https://doi.org/10.3390/catal16060525 (registering DOI) Submission received: 12 March 2026 / Revised: 2 April 2026 / Accepted: 2 June 2026 / Published: 6 June 2026 The high energy consumption of water electrolysis is primarily limited by the sluggish oxygen evolution reaction (OER). Replacing the OER with thermodynamically favorable anodic reactions provides an effective strategy to improve energy efficiency. Among these reactions, the sulfide oxidation reaction (SOR) offers both low thermodynamic potential and environmental relevance. In this work, we develop a high-entropy metal sulfide catalyst, CuNiCoFeMnS, via a facile aqueous synthesis route, achieving homogeneous elemental dispersion and a highly disordered structure. The catalyst exhibits excellent SOR activity, delivering a low potential of 0.396 V to achieve a current density of 10 mA cm −2. In addition, it enables a significant reduction of 1.05 V in cell voltage at 50 mA cm −2 compared with conventional water electrolysis. Furthermore, by integrating solar energy, the system enables simultaneous upgrading of sulfide-containing wastewater and energy-efficient hydrogen production. These results demonstrate a promising pathway toward coupling waste remediation with sustainable hydrogen generation. Keywords: Share and Cite MDPI and ACS Style Jiang, L.; Lau, P.L.; Kang, H.; Duan, B.; Wang, A.; Hsu, H.-Y.; Yin, Z.; Jia, G. Facile Aqueous Synthesis of High-Entropy Metal Sulfides for Sulfion Oxidation-Assisted Energy-Saving Hydrogen Production. Catalysts 2026, 16, 525. https://doi.org/10.3390/catal16060525 AMA Style Jiang L, Lau PL, Kang H, Duan B, Wang A, Hsu H-Y, Yin Z, Jia G. Facile Aqueous Synthesis of High-Entropy Metal Sulfides for Sulfion Oxidation-Assisted Energy-Saving Hydrogen Production. Catalysts. 2026; 16(6):525. https://doi.org/10.3390/catal16060525 Chicago/Turabian Style Jiang, Linwei, Poh Lin Lau, Huaiyuan Kang, Bosong Duan, Aixiang Wang, Hsien-Yi Hsu, Zongyou Yin, and Guohua Jia. 2026. "Facile Aqueous Synthesis of High-Entropy Metal Sulfides for Sulfion Oxidation-Assisted Energy-Saving Hydrogen Production" Catalysts 16, no. 6: 525. https://doi.org/10.3390/catal16060525 APA Style Jiang, L., Lau, P. L., Kang, H., Duan, B., Wang, A., Hsu, H.-Y., Yin, Z., & Jia, G. (2026). Facile Aqueous Synthesis of High-Entropy Metal Sulfides for Sulfion Oxidation-Assisted Energy-Saving Hydrogen Production. Catalysts, 16(6), 525. https://doi.org/10.3390/catal16060525 Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here. Article Metrics Article metric data becomes available approximately 24 hours after publication online.
