Szczegóły publikacji
Opis bibliograficzny
Synergistic effect of temperature and magnetic field orientation on Ni electrocatalyst activity and morphology for hydrogen evolution reaction / Safya ELSHARKAWY, Mahmoud M. YOUSSIF, Piotr ŻABIŃSKI // Coatings [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2079-6412 . — 2026 — vol. 16 iss. 5 art. no. 585, s. 1–20. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 18–20, Abstr. — Publikacja dostępna online od: 2026-05-12. — S. Elsharkawy, M. M. Youssif - dod. afiliacja: Tanta University, Tanta, Egypt
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 167821 |
|---|---|
| Data dodania do BaDAP | 2026-06-22 |
| Tekst źródłowy | URL |
| DOI | 10.3390/coatings16050585 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Coatings |
Abstract
Hydrogen represents a promising clean and renewable energy source. Therefore, improving the efficiency of electrocatalysts is essential for effective hydrogen production. In this work, Ni electrocatalysts were synthesized via the electrodeposition method from ethaline deep eutectic solvent (DES) at 45 °C, 55 °C, and 65 °C under perpendicular (B⊥) and parallel (B‖) magnetic field directions relative to the electrode surface. Scanning electron microscopy (SEM) was employed to investigate the morphological study, which shows that Ni deposits under B⊥ promote columnar grain growth, while B‖ favors lateral, compact structures. Furthermore, moderate temperature (55 °C) in the case of using B⊥ produced finer grains and smoother surfaces compared to other temperatures in the same direction, enhancing the catalytic performance for HER. Electrochemical techniques, including linear sweep voltammetry (LSV) and chronoamperometry, were employed to evaluate the catalytic performance for HER in 1 M NaOH and the adsorption–desorption process, respectively. The results suggest that efficient HER performance is associated with balanced hydrogen adsorption and desorption behavior. The Ni deposit at 55 °C under (B⊥) exhibited the lowest overpotential (−215 mV) compared to the deposits at 45 °C and 65 °C under the same magnetic field direction, indicating superior overall HER performance. This performance is attributed to balanced hydrogen adsorption–desorption behavior despite the relatively high Tafel slope value (298 mV·dec−1). However, the lowest Tafel slope among the whole samples prepared under both (B⊥) and (B‖) was found to be (219 mV·dec−1), reflecting faster kinetics, which was obtained for the sample deposited at 45 °C under (B‖).
