Nanoporous metals by dealloying multicomponent metallic glasses

被引：280

作者：

Yu, Jinshan ^{[1
]}

Ding, Yi ^{[2
]}

Xu, Caixia ^{[2
]}

Inoue, Akihisa ^{[1
]}

Sakurai, Toshio ^{[1
]}

Chen, Mingwei ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 14期

关键词：

D O I：

10.1021/cm8009644

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The synthesis of nanoporous palladium by electrochemically dealloying multicomponent Pd30Ni50P20 ribbons were produced by single-roller melt-spinning in vacuum which was introduced in detail elsewhere. X-ray diffraction (XRD) and transmission electron microscopy (TEM) demonstrated that the as-obtained ribbons are fully amorphous with a uniform structure and composition down to subnanoscale. The electrochemical dealloying process of the Pd30Ni50P20 metallic glass was monitored by the cross-sectional SEM micrographs. Nanoporous palladium with a rather uniform structure was obtained. It was observed that nanoporosity formation is mainly controlled by the dissolution process of the less noble Ni and P in the metallic glass system rather than by the surface diffusion of Pd in the acid during electrochemical dealloying.

引用

页码：4548 / 4550

页数：3

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