Durable oxygen evolution reaction of one dimensional spinel CoFe2O4 nanofibers fabricated by electrospinning

• Published in: RSC advances Vol. 8; no. 1; pp. 5338 - 5343
• Main Authors: Zhang, Zhengmei, Zhang, Jingyan, Wang, Tao, Li, Zhiwei, Yang, Guijin, Bian, Haiqin, Li, Jinyun, Gao, Daqiang
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 01.01.2018; The Royal Society of Chemistry
• Subjects: Catalysis; Chemistry; Cobalt ferrites; Electrocatalysts; Electrospinning; Nanofibers; Oxygen evolution reactions; Roasting; Spinel
• ISSN: 2046-2069
• DOI: 10.1039/c7ra11330g

One dimensional spinel CoFe 2 O 4 nanofibers were synthesized via the electrospinning technique. The nanofibers were calcined at different temperatures. All CoFe 2 O 4 nanofibers show excellent oxygen evolution reaction (OER) performance. The nanofibers calcined at 750 °C have a multi-particle nanochain structure. The nanochain exhibits excellent catalytic performance for OER in 1 M KOH (pH = 14) producing a current density of 10 mA cm −2 at an overpotential of 0.34 V, and the small onset potential of 1.32 V versus RHE, better than that of the commercial Ir/C (20%) catalyst. Furthermore, the stability of CoFe 2 O 4 multi-particle nanochains toward the OER decreases by only 0.78% even after a long period of 80 000 s. Our finding suggests that CoFe 2 O 4 nanofibers with a multi-particle nanochain structure could serve as a new group of OER electrocatalysts with excellent performance. One dimensional spinel CoFe 2 O 4 nanofibers were synthesized via the electrospinning technique.