Catalytic Properties of Ni-Al Intermetallic Nanoparticles Fabricated by Thermal Plasma Process

Abstract:

The catalytic activity of Ni-Al (Ni25Al) nanoparticles fabricated by thermal plasma evaporation was examined for methanol decomposition and CO oxidation. The nanoparticles exhibited high activity for both reactions. Characterization of the nanoparticles revealed that the fabricated nanoparticles were mainly comprised of Ni and Ni₃Al phases. During CO oxidation, the Ni phase was oxidized to NiO, while the Ni₃Al phase remained unchanged. The NiO phase is supposed to serve as the active sites for CO oxidation. In contrast, during methanol decomposition, no obvious oxidation was observed for both Ni and Ni₃Al phases. The Ni and Ni₃Al phases are supposed to contribute to the high activity for methanol decomposition.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 2040-2045
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.2040
• Online since: May 2014
• Authors: Y. Xu*, Jun You Yang, Masahiko Demura, Toshiyuki Hirano, Yoshitaka Matsushita, Masahiko Tanaka, Yoshio Katsuya
• Keywords: Catalyst, CO Oxidation, Methanol Decomposition, Ni-Al Nanoparticles, Thermal Plasma Process

References

[1] M. Sankar, N. Dimitratos, P.J. Miedziak, P.P. Wells, C.J. Kiely, G.J. Hutchings, Chem. Soc. Rev. 41 (2012) 8099-8139.

DOI: 10.1039/c2cs35296f

[2] B.D. Chandler, C.G. Long, J.D. Gilbertson, C.J. Pursell, G. Vijayaraghavan, K.J. Stevenson, J. Phys. Chem. C 114 (2010) 11498-11508.

DOI: 10.1021/jp101845d

[3] J. Arana, P.R. de la Piscina, J. Llorca, J. Sales, N. Homs, J.L.G. Fierro, Chem. Mater. 10 (1998) 1333-1342.

[4] W.M.H. Sachtler, Ensemble and Ligand Effects in Metal Catalysis, in: G. Ertl, H. Knozinger, F. Schuth, J. Weitkamp (Eds. ), Handbook of Heterogeneous Catal., WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2008, pp.1585-1593.

[5] N. Wada, Jpn. J. Appl. Phys. 6 (1967) 553-556.

[6] M. Uda, Nanostructured Mater. 1 (1992) 101-106.

[7] T. Minami, S. Ida, T. Miyata, Thin Solid Films 416 (2002) 92-96.

[8] Z. Wei, P. Yan, W. Feng, J. Dai, Q. Wang, T. Xia, Materials Characterization 57 (2006) 176-181.

[9] X.K. Duan, J.Y. Yang, W. Zhong, W. Zhu, S.Q. Bao, X.A. Fan, Powder Technology 172 (2007) 63-66.

[10] D.P. Pope, S.S. Ezz, Int. Mater. Rev. 29 (1984) 136-167.

[11] M. Yamaguchi, Y. Umakoshi, Progress in Mater. Sci. 34 (1990) 1-148.

[12] Y. Xu, S. Kameoka, K. Kishida, M. Demura, A.P. Tsai, T. Hirano, Intermetallics 13 (2005) 151-155.

DOI: 10.1016/j.intermet.2004.07.039

[13] Y. Ma, Y. Xu, M. Demura, D.H. Chun, G. Xie, T. Hirano, Catal. Lett. 112 (2006) 31-36.

[14] Y. Xu, M. Demura, T. Hirano, Appl. Surf. Sci. 254 (2008) 5413-5420.

[15] Y. Ma, Y. Xu, M. Demura, T. Hirano, Appl. Catal. B: Enviromental 80 (2008) 15-23.

[16] Y. Xu, J.Y. Yang, M. Demura, T. Hara, T. Hirano, Materials Science Forum 654-656 (2010) 2907-2910.

DOI: 10.4028/www.scientific.net/msf.654-656.2907

[17] M. Tanaka, Y. Katsuya, A. Yamamoto, Rev. Sci. Instruments 79 (2008) 075106-1-6.

[18] G. Saravanan, H. Abe, Y. Xu, N. Sekido, H. Hirata, S. Matsumoto, H. Yoshikawa, Y. Yomabe-Mitarai, Langmuir 26 (2010) 11446-11451.

DOI: 10.1021/la100942h

[19] G.W. Huber, J.W. Shabaker, J.A. Dumesic, Science 300 (2003) 2075-(2077).