Electrochemical actuation behaviors and mechanisms of bulk nanoporous Ni-Pd alloy

Metallic actuators have recently aroused great interests, and alloying of noble element with earth-abundant metal is essential to lower the cost of actuation materials while keeping a significant strain response. Here, we report the design/fabrication of bulk nanoporous nickel-palladium alloy by dea...

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Bibliographic Details
Published inScripta materialia Vol. 137; pp. 73 - 77
Main Authors Zhang, Jie, Lv, Lanfen, Gao, Hui, Bai, Qingguo, Zhang, Chi, Zhang, Zhonghua
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2017
Subjects
Dealloying
Electrochemical actuation
Hydrogen adsorption/absorption-desorption
Nanoporous alloy
Electrochemical actuation
Dealloying
Nanoporous alloy
Hydrogen adsorption/absorption-desorption
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Summary:Metallic actuators have recently aroused great interests, and alloying of noble element with earth-abundant metal is essential to lower the cost of actuation materials while keeping a significant strain response. Here, we report the design/fabrication of bulk nanoporous nickel-palladium alloy by dealloying. The alloy with a hierarchically porous structure shows different actuation behaviors in different electrolytes, which are correlated with the adsorption/desorption of hydrogen/hydroxyl and the nature (clean or oxide-cover) of ligament surface. The maximum reversible strain of the nickel-palladium actuator could reach 0.47% in potassium hydroxide solution, which is more competitive compared with other metallic actuation materials. The np-Ni80Pd20 with a hierarchically porous structure could trigger reversible strain of 0.47% in 1.0M KOH solution. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2017.05.010