Ni3B–CoS2 nanocomposite-coated corrosion-resistant Ti substrate for enhanced oxygen evolution reaction
Ionics, cilt.32, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 32
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s11581-025-06882-1
- Dergi Adı: Ionics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
- Anahtar Kelimeler: Nickel boride, Cobalt sulfide, HER, OER, Electrocatalyst
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
The pursuit of highly active, durable, and earth-abundant electrocatalysts for the oxygen evolution reaction (OER) is essential for the advancement of next-generation energy conversion technologies. However, achieving a balance between high catalytic activity, long-term stability, and the use of cost-effective, earth-abundant materials remains a significant challenge in the development of efficient OER electrocatalysts. The dual-phase systems exhibit remarkable electrochemical stability, a dramatically reduced charge transfer resistance, robustness and efficiency under long-term operating conditions. In this study, we report the fabrication of a novel dual-phase Ni3B-CoS2 electrocatalyst through a sequential approach involving chemical reduction followed by hydrothermal synthesis. This composite integrates the advantageous properties of transition metal borides and chalcogenides, creating a rich network of hetero interfaces that serve as highly active sites for OER. The OER activity of resulting Ni3B-CoS2 electrocatalyst demonstrates a low overpotential of 120 mV at a current density of 20 mA cm-2 and Tafel slope of 214 mV dec-1 in 1.0 M KOH. This dual Ni boride-Co sulfide system tailored specifically for OER, represent a significant advancement in the field of non-noble metal-based electrocatalysts, offering promising prospects for practical applications in sustainable energy technologies.