Preparation and Characterization of Fe₃O₄-Pt/C Electro-Catalysts for Zinc-Air Battery Cathodes

Abstract:

Fe₃O₄ modified Pt/C electro-catalyst was synthesized and studied. Fe₃O₄ and Fe₃O₄ with carbon coating (designated as Fe₃O₄/C) were prepared by co-precipitation method and ethyl acetate pretreatment. Fe₃O₄ and Fe₃O₄/C were sprayed onto the Pt/C cathode surface. X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) results show that Fe₃O₄ and Fe₃O₄ with carbon coating nano-particles (Fe₃O₄/C) are distributed evenly and c.a. 11.2 nm and 14.3 nm, respectively. TEM images show that electrode surfaces with Fe₃O4 and Fe₃O₄/C are of little difference from that with Pt/C only; Fe₃O₄/C is much more evenly distributed on the electrode surface than Fe₃O₄ because of the adaptability of carbon coating. Cathodic curves of Rotating Disk Electrode (RDE) tests shows that the adding of Fe₃O₄ (7 wt %) improves oxygen reduction reaction (ORR) activity about 30 mV in both cases. The adding of Fe₃O₄/C (Fe₃O₄: 7 wt %) to the Pt/C catalysts demonstrates the highest peak current of about 13.8 mA•cm^-2 in all cases. The promotion of Fe₃O₄ in O₂ enrichment and dispersion of Pt particles are confirmed in the study. The paramagnetism of Fe₃O₄ and its promotion in 4-electron oxygen reduction reaction (ORR) are the possible reasons for the promotion.his template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 1184-1189
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.1184
• Online since: May 2011
• Authors: Hong Zhao, Hai Li Wang, Li Jun Liang, Hong Feng Xu, Jie Fu
• Keywords: Carbon-Coating, Fe₃O₄, Oxygen Reduction Reaction, Zinc-Air Battery

References

[1] Olivier Anto; Yann Bultel: J. J Electronal Chem, 499(1), (2001) pp.85-94

[2] S.Z. Wang, X. Liu, Acta Phys. -Chim. Sin, 20(5), (2004) pp.472-477

[3] Y.Mao [Master Dissertation]. ChangSha: Zhongnan Univ, 2008.4:2

[4] Q.H. Huang, W.Wang and B.Han: Power Supply Technology, 28(7), (2004) pp.408-410

[5] S.H. Deng, H. Li, J.Li, Y.Q. Liu and L.Sun: J. Function Polymers, 21（4）, (2008) pp.437-442

[6] J. Ponce, J.H. Rehspringer and G.J. Poillerat: Electrochim. Acta, 47(22), (2001) pp.3373-3380.

[7] Z D Wei, W Zh Huang and Sh T.Zhang: J. Power Sources, 30, (2000) pp.1133-1136

[8] Information on http://www.mahalo.com/iron-ii-iii-oxide

[9] Greenwood, Norman N and A.Earnshaw, (1997), Chemistry of the Elements (2nd ed.), Oxford: Butterworth-Heinemann, ISBN 0-7506-3365-4

DOI: 10.1002/(sici)1099-0739(199812)12:12<880::aid-aoc755>3.0.co;2-c

[10] V Yeager, A K Lin and H.Dao: J New Mater. Electrochem. Syst. 1(1), (1998) pp.17-20

[11] WG Yu, TL Zhang, JG Zhang, JY Guo and RF Wu: Progress In Chem. 19(6), (2007) pp.884-892

[12] A Strzelewicz and J.Zbigniew Grzywna: J. Membr. Sci. 294(1-2), (2007) p.60–67

[13] J Perez, E R Gozalez and E A Ticianelli: J. Electrochim. Acta, 44(8-9), (1998) pp.1329-1339.