• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Theoretical and experimental studies of the influence of gold ions and DMH on cyanide-free gold electrodeposition
【24h】

Theoretical and experimental studies of the influence of gold ions and DMH on cyanide-free gold electrodeposition

机译：金离子和DMH对无氰金电沉积的影响的理论与实验研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Quantum chemical calculations based on density functional theory (DFT) were employed to determine an appropriate gold source for gold electroplating and to ascertain the stable structures of gold-complexes in cyanide-free electrolyte. Based on the charge distribution of 5,5-dimethylhydantoin (DMH) and the bonding energy of gold complexes, Au3+ is the appropriate gold source for DMH-based gold electroplating electrolyte to get greater cathodic polarization and [Au(DMH)(4)](-) with 2N(4)-Au coordination structure is the most stable form of gold ion in the electrolyte. The influence of DMH, used as the complexing agent, on electrochemical behaviors was investigated using cathodic polarization, cyclic voltammetry, and chronoamperometry measurements. With DMH as the complexing agent, the cathodic polarization of gold electrodeposition was significantly enhanced. DMH concentration was determined as 0.30 mol L-1 based on the investigation of the influence of the DMH concentration on cathodic polarization and gold electrodeposit micromorphology. The kinetic features based on cyclic voltammogram measurements revealed that the electrodeposition was an irreversible process under diffusion control with 0.30 mol L-1 DMH as the complexing agent. The ion and electron transfers were obviously inhibited by DMH. The gold electrodeposition process displayed progressive nucleation according to the Scharifker and Hills nucleation model with various applied potentials. The growth rate of the crystal nucleus was reduced by DMH and promoted by a negative shift of E-ap.
机译：采用基于密度泛函理论（DFT）的量子化学计算来确定用于金电镀的合适的金源，并确定无氰基复合物的稳定结构氰化物电解质。基于5,5-二甲基羟基苯胺素（DMH）的电荷分布和金络合物的粘合能，Au3 +是用于DMH基金电镀电解质的适当金源，得到更大的阴极极化和[Au（DMH）（4）] （ - ）2N（4） - au配位结构是电解质中最稳定的金离子形式。使用阴极偏振，循环伏安法和计时率测量研究了DMH在电化学行为上的DMH对电化学行为的影响。用DMH作为络合剂，金电沉积的阴极极化显着提高。基于研究DMH浓度对阴极偏振和金电沉积微晶的影响，确定DMH浓度为0.30mol L-1。基于循环伏安图测量的动力学特征揭示了电沉积是在络合剂0.30mol L-1dmH的扩散控制下的不可逆过程。 DMH明显抑制离子和电子转移。黄金电沉积过程根据具有各种应用潜力的Scharifker和Hills成核模型显示逐步成核。晶体核的生长速率通过DMH降低，并通过E-AP的负偏移促进。

著录项

  • 来源
    《RSC Advances》 |2018年第5期|共11页
  • 作者

    Ren Xuefeng; An Maozhong;

  • 作者单位

    Dalian Univ Technol Sch Food &

    Environm Panjin 124221 Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn State Key Lab Urban Water Resource &

    Environm Harbin 150001 Heilongjiang Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号