Fabrication of a Hydrogen Sensor using Palladium-coated Silver Dendrites Formed Electrochemically

被引：11

作者：

Lee, Shin-Bok ^{[1
]}

Lee, Ho-Young ^{[1
]}

Lee, Eunsongyi ^{[2
]}

Lee, Wooyoung ^{[2
]}

Joo, Young-Chang ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2010年 / 16卷 / 05期

关键词：

nanostructured materials; hydrogen absorbing materials; coating; electro chemistry; electrical conductivity/resistivity; FILAMENT FORMATION; THIN-FILM; ALLOYS; DIFFUSION;

D O I：

10.1007/s12540-010-1015-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Here, we report a cost-effective method for making palladium-coated silver (Ag) dendrites for hydrogen sensing. Ag dendrites, 50-150 nm in diameter, are made through electrochemical migration in a micro-electrochemical cell. They are then coated with a 200-nm-thick palladium (Pd) thin film. The hydrogen sensor made of palladium-coated Ag dendrites showed better hydrogen sensing characteristics than ones made of a pure Pd film. This is due to the large surface area of the Ag dendrites. Heat-treatment made the hydrogen sensing curve more stable, which is attributable to an alloying effect between Pd and Ag.

引用

页码：789 / 792

页数：4

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