4-4-3 アンモニアボラン加水分解用ニッケル触媒に対するL-アルギニンの添加効果(4-4 水素エネルギーシステム1,Session4 新エネルギー,研究発表)

概要

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An amorphous nickel catalyst was synthesized by reduction in an aqueous NaBH_4/NH_3BH_3 solution with or without L-arginine. Both the Ni(II) species with and without L-arginine were reduced to metallic nickel after the reduction in the aqueous NaBH_4/NH_3BH_3 solution. The nickel catalyst with L-arginine maintains relatively high activity for hydrolysis of NH_3BH_3 to generate a stoichiometric amount of hydrogen with the cycle number up to 5, while the reaction rate in the presence of the bare nickel catalyst was relatively low activity through the cycle number up to 5. After five cycles, the nickel catalyst with L-arginine possesses the high dispersion, while the agglomerate of nickel in the bare nickel catalyst is observed. The results indicate that L-arginine maintains the dispersion of nickel nanoparticles, leading to higher activity against cycle tests than the bare nickel catalyst.
2011-08-09