Atomic-Level Pd-Pt Alloying and Largely Enhanced Hydrogen-Storage Capacity in Bimetallic Nanoparticles Reconstructed from Core/Shell Structure by a Process of Hydrogen Absorption/Desorption

被引：144

作者：

Kobayashi, Hirokazu ^{[1
]}

Yamauchi, Miho ^{[1
,2
]}

Kitagawa, Hiroshi ^{[1
,3
,4
]}

Kubota, Yoshiki ^{[5
]}

Kato, Kenichi ^{[6
,7
]}

Takata, Masaki ^{[6
,7
]}

机构：

[1] Kyushu Univ, Fac Sci, Dept Chem, Fukuoka 8128581, Japan

[2] PRESTO, JST, Chiyoda Ku, Tokyo 1020075, Japan

[3] CREST, JST, Chiyoda Ku, Tokyo 1020075, Japan

[4] Kyoto Univ, Frontier Res Ctr, INAMORI, Nishi Ku, Fukuoka 8193095, Japan

[5] Osaka Prefecture Univ, Grad Sch Sci, Dept Phys Sci, Osaka 5998531, Japan

[6] RIKEN, SPring Ctr 8, Sayo, Hyogo 6795148, Japan

[7] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 16期

关键词：

PALLADIUM; ABSORPTION;

D O I：

10.1021/ja1013163

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have achieved the creation of a solid-solution alloy where Pd and Pt are homogeneously mixed at the atomic level, by a process of hydrogen absorption/desorption as a trigger for core (Pd)/shell (Pt) nanoparticles. The structural change from core/shell to solid solution has been confirmed by in situ powder X-ray diffraction, energy dispersive spectra, solid-state H-2 NMR measurement, and hydrogen pressure-composition isotherms. The successfully obtained Pd-Pt solid-solution nanoparticles with a Pt content of 8-21 atom % had a higher hydrogen-storage capacity than Pd nanoparticles. Moreover, the hydrogen-storage capacity of Pd-Pt solid-solution nanoparticles can be tuned by changing the composition of Pd and Pt.

引用

页码：5576 / +

页数：4

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