N-doped bamboo-like CNTs combined with CoFe–CoFe2O4 as a highly efficient electrocatalyst towards oxygen evolution. (28th February 2020)

• Record Type: Journal Article
• Authors: Xu, Deyao; Liu, Beibei; Liu, Guiyu; Su, Kanda; Yang, Chunming; Tong, Haixia; Qian, Dong; Li, Junhua
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 11(2020)
• Page Start: 6629
• Page End: 6635
• Publication Date: 2020-02-28
• Subjects: CoFe–CoFe2O4/N-CNTs -- Electrocatalyst -- Oxygen evolution reaction -- Synergistic effect -- Electrochemical surface area; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.12.180
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, we developed a novel hybrid with N-doped bamboo-like carbon nanotubes combined with the CoFe alloy and its oxide (denoted as CoFe–CoFe2 O4 /N-CNTs) via an extremely facile one-step pyrolysis method. When applied as an electrocatalyst towards OER in 1.0 M KOH solution, CoFe–CoFe2 O4 /N-CNTs exhibits a small overpotential of 334 mV to afford a current density of 10 mA cm −2 associated with a low Tafel slope of 80 mV dec −1 and long-term stability. The remarkable OER electrocatalytic performance of CoFe–CoFe2 O4 /N-CNTs is mainly attributed to the synergistic effect between CoFe and CoFe2 O4 as well as the increased active sites resulting from the introduction of N-CNTs. More impressively, the introduction of Fe can significantly cut down the usage of relatively toxic and expensive Co accompanied with the dramatic enhancement of OER electrocatalytic performance originating from the robust synergistic effect between Co and Fe. Highlights: We demonstrate a facile route to fabricate a novel CoFe–CoFe2 O4 /N-CNTs hybrid. CoFe–CoFe2 O4 /N-CNTs was prepared via a one-step pyrolysis method. CoFe–CoFe2 O4 /N-CNTs shows excellent electrocatalytic performance towards OER. The superb performance of CoFe–CoFe2 O4 /N-CNTs stems from its rational structure.