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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.53  No.3 (2012)  >  pp.524-530

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Preparation of Nanoporous Ruthenium Catalyst and Its CO Oxidation Characteristics

Masataka Hakamada1), Junichi Motomura1), Fumi Hirashima1) and Mamoru Mabuchi1)
1) Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University

Anodic polarization measurements for various ruthenium (Ru) alloys revealed that hexagonal close-packed nanoporous Ru (np-Ru) can be fabricated by dealloying or selective dissolution of manganese (Mn) from Ru–Mn alloy. The pore size and specific surface area of fabricated np-Ru were 3 nm and 51.5 m2 g−1, respectively. An electron diffraction pattern suggested a polycrystalline nature of the fabricated np-Ru, which is perhaps due to the change in the crystal structure during dealloying. The oxidation of carbon monoxide (CO) was efficiently catalyzed by the np-Ru. The activation energy was 82 kJ mol−1 which is comparable to that of the polycrystalline RuO2/Ru catalyst. The present np-Ru is a novel candidate as a recoverable Ru catalyst.

ruthenium, catalyst, porous materials, dealloying, CO oxidation

Received: October 24, 2011
Accepted: December 16, 2011 , Published online: February 25, 2012
Copyright (c) 2012 The Japan Institute of Metals



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