[1C01-03] Functional materials 1

[1C01] Development of TiO₂ supported immiscible RhCu bimetallic alloy catalyst for efficient hydrogen production from ammonia borane

○Kazuki Shun¹, Shinya Masuda¹, Kohsuke Mori^1,2, Yasutaka Kuwahara^1,2,3, Hiromi Yamashita^1,2 (1. Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2. ESICB, Kyoto University, 3. JST PRESTO)

Alloying of metal is one of the useful pathway to improve the performance of metal loaded heterogeneous catalysts. However, it is thermodynamically difficult to form alloy depending on the metal species which are immiscible in bulk state. Thus, characteristic elucidation of such immiscible alloy is desired. Herein, we found that Rh and Cu, one of immiscible metal combinations, form solid solution alloy promoted by hydrogen spillover on a TiO₂. Moreover, TiO₂-supported RhCu alloy catalyst (RhCu/TiO₂) showed 2.4 times higher activity than monometallic Rh/TiO₂ in the hydrogen production via the hydrogen production from ammonia borane.