Electrocatalytic Activities of Trirutiles Based on MTaO6 (M=Co, Ni, Mg) for Oxygen Reduction Reaction

Takayuki Konishi; Hideki Kawai; Morihiro Saito; Jun Kuwano; Hidenobu Shiroishi

doi:10.4028/www.scientific.net/KEM.421-422.459

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Electrocatalytic Activities of Trirutiles Based on MTaO₆ (M=Co, Ni, Mg) for Oxygen Reduction Reaction

Abstract:

The trirutile oxides MTa2O6 (M=Co,Ni,Mg) [MTs] and the substitution products M1-xNxTa2-yLyO6 (N=Mn, L=Sn,Ti,Zr) [M1-xNxTa2-yLy] were prepared by a conventional solid-state reaction. The oxygen reduction reaction (ORR) activities were evaluated with the onset potentials (Eon) of the ORR currents, the disk current densities (iD) and the efficiencies (Eff4) of 4-electron reduction, measured by a rotating ring-disk electrode (RRDE) technique. All the samples showed ORR activities and the Eon values were around +0.8 V vs. RHE in 0.1 M KOH. The CoTa2O6 electrocatalyst showed the best ORR property of the MTs samples: its Eff4 value was as high as ~80%. With substitution of Ti or Sn, the ORR activities of MgTa1.9T0.1O6, CoTa1.8Sn0.2O6 and NiTa1.9Ti0.1O6 were improved in alkaline solution, compared with those of MTa2O6. In acid solution, the same substitution of Ti and Sn resulted in improvement of Eff4, but no significant improvements of Eon and iD.

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Periodical:

Key Engineering Materials (Volumes 421-422)

Pages:

459-462

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.421-422.459

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Online since:

December 2009

Authors:

Takayuki Konishi, Hideki Kawai, Morihiro Saito, Jun Kuwano, Hidenobu Shiroishi

Keywords:

Electrocatalyst, MTa₂O₆, ORR, Oxygen, RRDE, Trirutile

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References

[1] W. Vielstich, A. Lamm H. Gasteiger (Eds. ), Handbook of Fuel Cells: Fundamentals Technology and Applications, Vols. 1-4, (John Wiley & Sons, Chichester, 2003).

Google Scholar

[2] P. J. Gelling and H. J. M. Bouwmeester (Eds. ), The Handbook of Solid State Electrochemistry, (CRC Press, Baca Raton, Florida, 1997), pp.329-407.

Google Scholar

[3] M. D. Koninck, S-C. Poirier and B. Marsan, J. Electrochem. Soc., 154 (2007), p. A381.

Google Scholar

[4] K. Matsuoka Y. Iriyama, T. Abe, M. Matsuoka and Z. Ogumi, J. Power Sources, 150 (2005), p.27.

DOI: 10.1016/j.jpowsour.2005.02.020

Google Scholar

[5] K. Miyazaki, N. Sugimura, K. Matsuoka, Y. Iriyama, T. Abe, M. Matsuoka and Z. Ogumi, J. Power Sources, 178 (2008), p.683.

DOI: 10.1016/j.jpowsour.2007.08.007

Google Scholar

[6] J. -M. Zen, R. Manoharan, and J. B. Goodenough, J. Appl. Electrochem., 22 (1992), p.140.

Google Scholar

[7] K. Yoshihara, Y. Saito, M. Saito, J. Kuwano and H. Shiroishi, Key Eng. Mater., 350 (2007), p.171.

Google Scholar

[8] Y. Saito, K. Yokota, K. Yoshihara, M. Saito, J. Kuwano and H. Shiroishi, Key Eng. Mater., 350 (2007), p.167.

Google Scholar

[9] J. Ye, A. Matsushita and Z. Zou, Int. J. Hydrogen Energy, 28 (2003), p.651.

Google Scholar

[10] E. Ohshima, K. Kusuda, S. Onodera and M. Kikuchi, J. Phys. Chem. Solids, 63 (2001).

Google Scholar