One-pot hydrothermal synthesis of Zinc ferrite/reduced graphene oxide as an efficient electrocatalyst for oxygen reduction reaction

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• 作者：Wei Hong^a ; Lingzhi Li^a ; Ruinan Xue^a ; Xiaoyang Xu^a ; Huan Wang^a ; Jingkuo Zhou^a ; Huilin Zhao^a ; Yahui Song^a ; Yu Liu^a ; ^b ; Jianping Gao^a ; ^b ; ^{jianpinggaols@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：ZnFe2O4 ; Reduced graphene oxide ; Eletrocatalyst ; Oxygen reduction reaction ; Nanohybrid ; Fuel cells
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：485
• 期：Complete
• 页码：175-182
• 全文大小：2151 K

文摘

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 69.8 wt% 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.