One-pot hydrothermal synthesis of Zinc ferrite/reduced graphene oxide as an efficient electrocatalyst for oxygen reduction reaction.
Fabrication of low-cost and efficient electrocatalyst for oxygen reduction reaction (ORR) is highly desirable. Herein, Zinc ferrite/reduced graphene oxide (ZnFe2O4/rGO) is prepared by a quite simple and environmentally benign approach and applied as a high performance ORR electrocatalyst for the first time. The surface morphology and chemical composition of ZnFe2O4/rGO are characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis and Fourier transform infrared spectroscopy. Cyclic voltammetry, linear sweep voltammetry and chronoamperometry are used to evaluate the electrochemical activities and stabilities of ZnFe2O4/rGO catalysts in alkaline media. Among ZnFe2O4/rGO with different mass ratios, the catalyst with 69.8wt% ZnFe2O4(called ZnFe2O4/rGO (3)) has the best catalytic activities and it shows much superior methanol tolerance and better durability than the commercial Pt/C catalyst. Due to the synergistic effect, the ZnFe2O4/rGO (3) nanohybrid exhibits high ORR catalytic performance and durability, which follows a desirable four electron transfer mechanism in alkaline media. Therefore, it may be a highly competitive catalyst for fuel cells and metal-air batteries.
School of Science, Tianjin University, Tianjin 300072, PR China.
Wei
W
Hong
School of Science, Tianjin University, Tianjin 300072, PR China.
Lingzhi
L
Li
School of Science, Tianjin University, Tianjin 300072, PR China.
Ruinan
R
Xue
School of Science, Tianjin University, Tianjin 300072, PR China.
Xiaoyang
X
Xu
School of Science, Tianjin University, Tianjin 300072, PR China.
Huan
H
Wang
School of Science, Tianjin University, Tianjin 300072, PR China.
Jingkuo
J
Zhou
School of Science, Tianjin University, Tianjin 300072, PR China.
Huilin
H
Zhao
School of Science, Tianjin University, Tianjin 300072, PR China.
Yahui
Y
Song
School of Science, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 30072, PR China.
Yu
Y
Liu
School of Science, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 30072, PR China. Electronic address: jianpinggaols@126.com.
Jianping
J
Gao
Eletrocatalyst; Fuel cells; Nanohybrid; Oxygen reduction reaction; Reduced graphene oxide; ZnFe(2)O(4)