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Preparation of Nano-Composited Catalyst from the Bulk Intermetallic Compound AuZr3 with Hydrogen Absorption

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Abstract

Calcination-induced catalytic activity of CO oxidation reaction (CO + 1/2O2 → CO2) for an intermetallic, AuZr3 and a hydride, AuZr3H x (x = 4.8) has been studied. The catalytic activities for both samples were originated from the formation of nano-gold particles and nano-crystalline ZrO2, result by oxidation upon calcination. Oxidation of the AuZr3H x occurred at lower temperature than the AuZr3, gave rise to the formation of more homogenous distribution and smaller sizes of nano-gold particles (~5 nm) on ZrO2, which were responsible for relatively high catalytic performance. This study provides the possibility of hydrogen absorption treatment being a beneficial process for obtaining nano-composite from intermetallic compounds for catalysts.

Graphical Abstract

Oxidation of the hydrogen absorbed AuZr3H x (x = 4.8) occurred at much lower temperature than that of the AuZr3. The calcined AuZr3H x exhibited more homogenous distribution of nano-gold particles with smaller sizes (~5 nm) on the ZrO2, which were responsible for relatively high performance of CO oxidation.

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Acknowledgements

We are grateful to Mr. H. Tanaka and Dr. S. Ito at University of Tsukuba and Prof. K. Tomishige at Tohoku University for help in performing the TPO measurement. This work was supported by Global COE Program “Materials Integration International Center of Education and Research, Tohoku University,” Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.

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Authors and Affiliations

  1. Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai, 980-8579, Japan

    Naruki Endo

  2. Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan

    Satoshi Kameoka & An Pang Tsai

  3. National Institute for Materials Science (NIMS), Tsukuba, 305-0003, Japan

    An Pang Tsai, Toshiya Hirata & Chikashi Nishimura

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  1. Naruki Endo
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  2. Satoshi Kameoka
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  3. An Pang Tsai
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  4. Toshiya Hirata
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  5. Chikashi Nishimura
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Correspondence to Naruki Endo.

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Endo, N., Kameoka, S., Tsai, A.P. et al. Preparation of Nano-Composited Catalyst from the Bulk Intermetallic Compound AuZr3 with Hydrogen Absorption. Catal Lett 139, 67–71 (2010). https://doi.org/10.1007/s10562-010-0397-x

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  • DOI: https://doi.org/10.1007/s10562-010-0397-x

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