20.500.12556/DiRROS-21245 Advancing oxygen evolution catalysis with dual-phase nickel sulfide nanostructures The production, conversion and storage of energy based on electrocatalysis, mainly assisted by oxygen evolution reaction (OER), plays a crucial role in alkaline water electrolyzers (AWEs) and fuel cells. Nevertheless, the insufficient availability of highly efficient catalyst materials at a reasonable cost that overcome the sluggish electrochemical kinetics of the OER is one of the significant obstacles. Herein, we report a fast and facile synthesis of vapor phase deposition of dual-phase nickel sulfide (Ni-sulfide) using low-temperature annealing in the presence of H2S and demonstrated as an efficient catalyst for OER to address the issues with sluggish electrochemical kinetics. The dual-phase Ni-sulfide structures consist of densely packed 10–50 μm microcrystals with 40–50 individual dual-phase layers, such as NiS and Ni7S6. As an electrocatalyst, the dual-phase Ni-sulfide exhibits excellent OER activity by achieving a current density of 10 mA/cm2 at an overpotential (η10) of 0.29 V and excellent electrochemical stability over 50 h. Besides, the Ni-sulfide displays considerable electrochemical robustness in alkaline conditions and forms OER-active Ni-oxide/hydroxide species during the process. Using an energy-efficient synthesis method, the fabricated unique crystalline nanodesign of dual-phase Ni-sulfide could open new pathways for the controlled synthesis of a high-efficiency group of electrocatalysts for a long-time stable electrochemical catalytic activity. electrocatalysts elektrokatalizatorji true false true ACS Publications ZDA Angleški jezik Slovenski jezik © 2025 The Authors. Neznano 2025-01-17 14:10:26 2025-01-17 14:10:27 2025-04-15 14:03:32 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Soavtorji: Suraj Gupta, Vasyl Shvalya, Martin Košiček, Janez Zavašnik, Uroš Cvelbar; Opis vira z dne 9. 1. 2025; str. A-I Vol. [in press] 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-10-28 2024-12-18 2025-01-02 544.5/.6 1520-5029 10.1021/acs.energyfuels.4c05182 221574659 https://pubs.acs.org/doi/10.1021/acs.energyfuels.4c05182 1 6c5d79bb-d4d4-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=30153 RAZ_Santhosh_Neelakandan_Marath_2024.pdf RAZ_Santhosh_Neelakandan_Marath_2024.pdf 1 E117039307379C9774A8FC5C4AB58DAE 41261b1c33cef56815782d6e933009dcd90df099fc9fcc926b2a4de348c2a83b e32873dc-d4d5-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=30156 Institut Jožef Stefan 0 0 0