Electrodeposition of metal/hydeoxide nano-composite material

电沉积金属/氢氧化物纳米复合材料

• 批准号: 13650782
• 负责人: HAYASHI Hidetaka
• 金额: $ 1.98万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650782/
• 关键词: electrodeposition; namo-composite; pH control; hydroxide; pH制御; 合金折出; 電気化学プロセス; 表面分析; 合金めっき; 水晶振動子微小秤量法; 電位差滴定; 複合めっき

The anomalous codeposition of Zn-Ni may be due to the preferential precipitation of zinc hydroxide on the cathode and the inhibition of nickel deposition according to the hydrogen production at the cathode and the pH increase. However, the author reports here that when both Zn^<2+> and Ni^<2+> coexist in the solution, the zinc hydroxide does not precipitate while the double hydroxide of both metals does.The formation of the double hydroxide and its electrolytic reduction at the cathode in zinc-nickel alloy deposition were investigated. By using an EQCM method combined with the electrochemical measurement, it was clarified that the hydrogen generation occurs prior to the alloy deposition and the double hydroxide adheres to the electrode surface. It was confirmed that the electrolytic reduction product of the adhered material on the quartz surface, was the zinc/nickel alloy with the Zn:Ni ratio of about 9:1, from the analysis by using SEM/EDX. It is considered that the double hydroxide adsorbed on the cathode surface acts as a precursor of the alloy deposition reaction.

锌镍共沉积的异常可能是由于氢氧化锌在阴极上优先析出，而阴极处产氢和pH升高抑制了镍的沉积。研究了锌镍合金沉积过程中双氢氧化物的形成及其在锌镍合金沉积过程中的阴极还原。通过EQCM方法结合电化学测试，明确了氢的生成发生在合金沉积之前，双氢氧化物附着在电极表面。通过扫描电子显微镜/能谱分析，证实了附着在石英表面的物质的电解还原产物为锌镍比约为9：1的锌镍合金。认为吸附在阴极表面的双氢氧化物是合金沉积反应的前驱物质。

项目成果

林 秀考, 松田征治: "水晶振動子微小秤量法と電位差滴定法による亜鉛-ニッケル合金めっき前駆体の検討"表面技術. 54. 620-621 (2003)

Hidetaka Hayashi、Seiji Matsuda：“使用石英晶体微量法和电位滴定法研究锌镍合金电镀前驱体”表面技术 54. 620-621 (2003)。

Hidetaka Hayashi, Seiji Matsuda, Takuma Katase: "The analysis of the zinc and iron group metal alloy codeposition mechanism using an EQCM"Proceedings Volume, ECS 202nd meeting. 2002-27. 576-586 (2002)

Hidetaka Hayashi、Seiji Matsuda、Takuma Katase：“使用 EQCM 分析锌和铁族金属合金共沉积机制”论文集，ECS 第 202 次会议。