Kobayashi Hirokazu, Yamauchi Miho, Ikeda Ryuichi, Yamamoto Tomokazu, Matsumura Syo, Kitagawa Hiroshi
Division of Chemistry , Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku , Kyoto , 606-8502 , Japan . Email:
JST , PRESTO, 4-1-8 Honcho, Kawaguchi , Saitama , 332-0012 , Japan.
Chem Sci. 2018 May 24;9(25):5536-5540. doi: 10.1039/c8sc01460d. eCollection 2018 Jul 7.
We report on binary solid-solution nanoparticles (NPs) composed of Pd and Ir, which are not miscible at the equilibrium state of the bulk, for the first time, by means of a process of hydrogen absorption/desorption from core (Pd)/shell (Ir) NPs. Only 20 at% replacement with Ir atoms doubled the hydrogen-storage capability compared to Pd NPs, which are a representative hydrogen-storage material. Furthermore, the systematic control of hydrogen concentrations and the corresponding pressure in Pd and Pd-M NPs (M = Ir, Pt, Au) have been achieved based on the band filling control of Pd NPs.
我们首次报道了由钯（Pd）和铱（Ir）组成的二元固溶体纳米颗粒（NPs），它们在块体平衡状态下是不互溶的，这是通过核（Pd）/壳（Ir）纳米颗粒的吸氢/脱氢过程实现的。与作为代表性储氢材料的钯纳米颗粒相比，仅用铱原子替换20原子百分比就能使储氢能力翻倍。此外，基于钯纳米颗粒的能带填充控制，实现了对钯和钯 - M纳米颗粒（M = Ir、Pt、Au）中氢浓度和相应压力的系统控制。
