Rapid mass production of iron nickel oxalate nanorods for efficient oxygen evolution reaction catalysis

The NiFe layered-double-hydroxide (NiFe-LDH) and the NiFe metal-organic framework (NiFe-MOF) demonstrate the best catalytic activity among NiFe-based materials for the oxygen evolution reaction (OER), which is important for efficient hydrogen production. However, the preparation processes of these m...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:New journal of chemistry 2021-12, Vol.46 (1), p.328-333
Hauptverfasser: Hu, Huixia, Lei, Xiang, Li, Shumei, Peng, Ruzhen, Wang, Jinliang
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The NiFe layered-double-hydroxide (NiFe-LDH) and the NiFe metal-organic framework (NiFe-MOF) demonstrate the best catalytic activity among NiFe-based materials for the oxygen evolution reaction (OER), which is important for efficient hydrogen production. However, the preparation processes of these materials are usually cumbersome and have a low yield, which eliminates their most critical advantage of being low cost. We propose a method for rapidly and efficiently preparing porous (Ni 0.5 Fe 0.5 )C 2 O 4 nanorods with an excellent OER catalytic performance. The overpotential of (Ni 0.5 Fe 0.5 )C 2 O 4 is 266 mV at 20 mA cm −2 under alkaline conditions, and the Tafel slope is 54.39 mV dec −1 . Furthermore, analysis of the changes in the surface properties of the material before and after catalysis determined that the real active material is (Ni 0.5 Fe 0.5 )(OH) x (C 2 O 4 ) 1− x . Using a simple scaled-up experiment, (Ni 0.5 Fe 0.5 )C 2 O 4 is mass-produced (40 g) via direct synthesis in 5 min. The composition and performance of the mass-produced sample are analysed under the same conditions, and (Ni 0.5 Fe 0.5 )C 2 O 4 still has a good catalytic performance and its composition has not changed. The efficient synthesis of (Ni 0.5 Fe 0.5 )C 2 O 4 nanorods with a porous structure provides a new option for the development of commercial catalysts using non-precious metals. Using a coprecipitation method we synthesized an oxalate, which has a good catalytic performance for oxygen evolution in an alkaline electrolyte. This method can efficiently synthesize a large number of electrocatalysts in a short time.
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj04668c