An ultrafast oxygen evolution reaction catalyzed by an amorphous Nickel–Dysprosium-based electrocatalyst with extraordinary spatial morphology

• Published in: Journal of sol-gel science and technology Vol. 106; no. 1; pp. 226 - 235
• Main Authors: Aman, Salma, Alanazi, Meznah M., Abdelmohsen, Shaimaa A. M., Abid, Abdul Ghafoor, Khosa, Rabia Yasmin, Manzoor, Sumaira, Nisa, Mehar Un, Al-Sehemi, Abdullah G., Farid, Hafiz Muhammad Tahir
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2023; Springer Nature B.V
• Subjects: Cations; Ceramics; Chemistry and Materials Science; Composites; Durability; Dysprosium; Electrocatalysts; Electrodes; Evolution; Flexible structures; Glass; Inorganic Chemistry; Materials Science; Morphology; Nanotechnology; Natural Materials; Nickel; Optical and Electronic Materials; Original Paper: Sol-gel and hybrid materials with surface modification for applications; Oxides; Oxygen evolution reactions; Perovskites; Phase transitions; Physics; Science; Valence; Water splitting; Perovskite; DyNiO; Electrocatalyst; Water splitting; Co-precipitation
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-023-06058-1

Oxygen evolution reaction (OER) during water splitting majorly based on the structure and nature of the electrocatalyst. Perovskite oxides (ABO 3 ) have a flexible structure and range of physicochemical features that make them interesting for the present study. Therefore, scientists are interested in using electrocatalyst Perovskite oxides (ABO 3 ) for OER. Nanostructures and amorphous patterns can appear when cations from the perovskite matrix are leached away from the A site. One of the most challenging problems is gaining enormous active amorphous subjects from cations in the B site rather than simply dissolving cations in the A site. In the present study, the crystalline perovskite (DyNiO 3 ) has been fabricated, which is converted into an amorphous nanostructured comparative to NiO, and characterized via numerous analytical characterization methods to investigate the structural, morphological, and textural characteristics. The designed substance is then investigated for electrochemical characterizations to evaluate the overpotential, Tafel slope, and durability. Among all, DyNiO 3 responses have a slight overpotential (η) of 265 mV and a low Tafel slope of 78 mV/dec with greater durability of 49 h. The efficient outcomes of the DyNiO 3 are because of the grater valence state of Ni 3+ containing edge splitting octahedral-frameworks, which are bordering by interstitial deformed octahedral Dy 3+ ion. This research improves perovskite oxides function as catalysts and can be applied to developing enhanced OER electrocatalysts and other energy applications in the near future. Graphical Abstract DyNiO3 was prepared and then deposited on the substrate such as nickel foam. The deposited nickel foam was then employed for the electrochemical measurements such water splitting applications. The chronoamperometric text was performed to conform the stability of the material. The material remained stable upto 84 h. Highlights The DyNiO 3 was fabricated via simple hydrothermal method. The fabricated material is characterized via numerous analytical characterization. The designed substance is then investigated for electrochemical characterizations to evaluate the overpotential, Tafel slope and durability. The DyNiO 3 responses a low overpotential of 265 mV and a low Tafel slope of 78 mV/dec with greater durability of 49 h.