Electrodeposited CoFeCuMoW multi-element coatings on 3D copper foam: Influence of deposition current density on HER and OER activity
International Journal of Hydrogen Energy, cilt.283, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 283
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ijhydene.2026.158041
- Dergi Adı: International Journal of Hydrogen Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Chemical Abstracts Core, Chimica, Compendex, Environment Index, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Copper foam, Deposition current density, Electrochemical water splitting, Electrodeposition, Hydrogen and oxygen evolution reactions, Multi-element coating
- Atatürk Üniversitesi Adresli: Evet
Özet
Electrocatalytic materials are being investigated to reduce activation barriers for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), improving water-splitting efficiency. Electrodeposited multi-element coatings are promising, cost-effective alternatives to noble-metal electrocatalysts. In this work, CoFeCuMoW coatings were synthesized via electrodeposition on copper foam and characterized by SEM/EDS, XRD, Raman, and XPS. Increasing the current density from 70 to 170 mA/cm2 produced a fine-grained coating. It also changed the composition: the Cu content decreased, the Fe, Mo, and W contents progressively increased, and the Co content peaked at 100 mA/cm2. The coated sample prepared at 140 mA/cm2 exhibited the best performance, with overpotentials of 89 and 264 mV at 10 mA/cm2 and Tafel slopes of 50 and 53 mV/dec for HER and OER, respectively. Long-term tests confirmed durability, and overall water splitting required only 1.59 V to reach 10 mA/cm2, underscoring its potential for scalable green hydrogen production.