Szczegóły publikacji
Opis bibliograficzny
Cobalt and nickel derivatives decorated on nitrogen-doped carbon from spent coffee grounds as an efficient catalyst for water splitting / Patrycja Grabowska, Mariusz Szkoda, Marta GAJEWSKA, Anna Ilnicka // International Journal of Hydrogen Energy ; ISSN 0360-3199. — 2025 — vol. 140, s. 175–186. — Bibliogr. s. 185–186, Abstr. — Publikacja dostępna online od: 2025-05-30
Autorzy (4)
- Grabowska Patrycja
- Szkoda Mariusz
- AGHGajewska Marta
- Ilnicka Anna
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 160741 |
|---|---|
| Data dodania do BaDAP | 2025-07-04 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.ijhydene.2025.05.340 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | International Journal of Hydrogen Energy |
Abstract
The development of non-precious metal catalysts for green H2 production remains a significant challenge. In this study, cobalt and nickel particles were incorporated into nitrogen-doped carbon derived from waste coffee grounds using a heating process under a nitrogen atmosphere. Electrochemical tests demonstrated improved bifunctional electrocatalytic efficiency and stability in alkaline media for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The best-performing catalysts, AC-SCG/Co and AC-SCG/Ni, exhibited the lowest overpotentials for HER, 327 mV and 248 mV, respectively, while AC-SCG/Co demonstrated superior OER performance with an overpotential of 560 mV, comparable to RuO2. Tafel slope analysis revealed excellent catalytic kinetics. The ECSA was calculated using a specific capacitance value of 0.04 mF cm−2, yielding the following results 0.155 cm2 for C-SCG, 0.853 cm2 for AC-SCG, 0.145 cm2 for C-SCG/Co, 1.32 cm2 for AC-SCG/Co, 0.17 cm2 for C-SCG/Ni, and 1.35 cm2 for AC-SCG/Ni. Activated carbon-based catalysts exhibited significantly higher ECSA values, which correlated well with BET-specific surface area measurements. These findings underline the importance of carbon activation and metal incorporation in optimizing electrocatalytic performance, marking a novel approach to efficient hydrogen production.
