A facile preparation of CoFe2O4 nanoparticles on polyaniline-functionalised carbon nanotubes as enhanced catalysts for the oxygen evolution reaction

作者：Liu, Yang; Li, Jing; Li, Feng; Li, Wenzhu; Yang, Haidong; Zhang, Xueyao; Liu, Yansheng; Ma, Jiantai^*

来源：Journal of Materials Chemistry A, 2016, 4(12): 4472-4478.

DOI：10.1039/c5ta10420c

• ELECTROCATALYTIC ACTIVITY
• REDUCTION REACTION
• EFFICIENT
• FE
• NI
• CO
• NANOCRYSTALS
• MN
• NANOCOMPOSITES
• NANOFIBERS

Designing and preparing highly efficient non-precious metal electrocatalysts for the oxygen evolution reaction (OER) is extremely urgent but still remains a challenge. In this study, a polyaniline-multiwalled carbon nanotube (PANI-MWCNT) supported, high performance CoFe2O4 nanoparticle (NP) loaded electrocatalyst (CoFe2O4/PANI-MWCNTs) is synthesized through a novel and simple in situ process under mild conditions. It is found that the introduction of PANI improves the synergistic effect between the CoFe2O4 NPs and MWCNTs, so as to promote the electrical conductivity and stability of the catalyst. Meanwhile, PANI provides more active sites to attach CoFe2O4 NPs uniformly and tightly. Electrochemical measurement shows that the electrocatalyst displays excellent OER activities at a low overpotential of 314 mV for 10 mA cm(-2) current density and a small Tafel slope of 30.69 mV dec(-1) in 1 M KOH at a scan rate of 5 mV s(-1). Furthermore, this electrocatalyst exhibits remarkably good durability evaluated by continuously cycling for 1000 cycles and stably working at 0.54 V (vs. Ag/AgCl) for at least 40 h. The achieved results confirm that the CoFe2O4/PANI-MWCNT hybrid is an earth-abundant and cheaply fabricated anode material for OER.

• 出版日期2016
• 单位兰州大学