Nanosize-Induced Drastic Drop in Equilibrium Hydrogen Pressure for Hydride Formation and Structural Stabilization in Pd鈥揜h Solid-Solution Alloys
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- 作者：Hirokazu Kobayashi ; Hitoshi Morita ; Miho Yamauchi ; Ryuichi Ikeda ; Hiroshi Kitagawa ; Yoshiki Kubota ; Kenichi Kato ; Masaki Takata ; Shoichi Toh ; Syo Matsumura
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：August 1, 2012
- 年：2012
- 卷：134
- 期：30
- 页码：12390-12393
- 全文大小：291K
- 年卷期：v.134,no.30(August 1, 2012)
- ISSN：1520-5126
文摘
We have synthesized and characterized homogeneous solid-solution alloy nanoparticles of Pd and Rh, which are immiscible with each other in the equilibrium bulk state at around room temperature. The Pd鈥揜h alloy nanoparticles can absorb hydrogen at ambient pressure and the hydrogen pressure of Pd鈥揜h alloys for hydrogen storage is dramatically decreased by more than 4 orders of magnitude from the corresponding pressure in the metastable bulk state. The solid-solution state is still maintained in the nanoparticles even after hydrogen absorption/desorption, in contrast to the metastable bulks which are separated into Pd and Rh during the process.