Galvanostatic Deposition of Palladium-Gold Alloys in a Lewis Basic EMI Cl BF 4 Ionic Liquid
Galvanostatic Deposition of Palladium-Gold Alloys in a Lewis Basic EMI Cl BF 4 Ionic Liquid
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路易斯碱性 EMI Cl BF 4 离子液体中钯金合金的恒电流沉积
DOI：
10.1149/1.1819835
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发表时间：
2004
影响因子：
3.9
通讯作者：
I. Sun
中科院分区：
文献类型：
--
作者：
F. Su;Jing;I. Sun
研究了在室温离子液体电解质1-乙基-3-甲基咪唑氯化物四氟硼酸盐体系（EMI-Cl-BF 4）中钯（II）和金（I）的电沉积。采用恒电流电解法获得了致密的合金镀层。沉积的Pd-Au合金中的Pd含量随着电流密度和镀液中Pd摩尔分数的增加而增加。对于在质量传输限制电流下获得的沉积物，沉积合金中的Pd含量接近镀浴中的Pd摩尔分数。沉积温度影响沉积的Pd-Au固溶体的均匀性。从X射线粉末衍射实验收集的数据表明，在高于80°C的温度下沉积的Pd-Au合金是均匀的Pd-Au固溶体。沉积物的扫描电子显微镜照片显示结节状颗粒。随着沉积电流的增加，颗粒尺寸减小。
The electrodeposition of palladium-gold alloy was investigated in an ambient temperature ionic liquid electrolyte, 1-ethyl-3-methylimidazolium chloride tetrafluoroborate system (EMI-Cl-BF 4 ), containing palladium(II) and gold(I). Compact alloy deposits were obtained with galvanostatic electrolysis. The Pd content in the deposited Pd-Au alloy increases with increasing current density and the Pd mole fraction in the plating bath. For deposits obtained under mass-transport-limited current, the Pd content in the deposited alloys approximated the Pd mole fraction in the plating bath. The deposition temperature affected the homogeneity of the deposited Pd-Au solid solution. Data collected from X-ray powder diffraction experiments showed that Pd-Au alloys deposited at temperatures higher than 80°C were homogeneous Pd-Au solid solutions. The scanning electron micrographs of the deposits revealed nodular particles. The particle size decreased with increasing deposition current.