Electrochemical actuation behaviors and mechanisms of bulk nanoporous Ni-Pd alloy
Electrochemical actuation behaviors and mechanisms of bulk nanoporous Ni-Pd alloy
复制标题
块状纳米多孔Ni-Pd合金的电化学驱动行为和机制
DOI：
10.1016/j.scriptamat.2017.05.010
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发表时间：
2017
影响因子：
6
通讯作者：
Zhang Zhonghua
中科院分区：
文献类型：
--
作者：
Zhang Jie;Lv Lanfen;Gao Hui;Bai Qingguo;Zhang Chi;Zhang Zhonghua
金属驱动器最近引起了人们的极大兴趣，而贵金属与富含稀土的金属的合金化是在保持显著应变响应的同时降低驱动器材料成本的关键。在这里，我们报道了用脱合金法制备块体纳米孔镍-钯合金的设计和制备。具有层次化多孔结构的合金在不同的电解液中表现出不同的驱动行为，这与氢/羟基的吸附/脱附以及韧带表面的性质(清洁或氧化物覆盖)有关。在氢氧化钾溶液中，镍-钯致动器的最大可逆应变可达0.47%，与其他金属致动器材料相比更具竞争力。
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.