• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2021, Vol. 57 ›› Issue (5): 177-184.doi: 10.3901/JME.2021.05.177

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Effects of Pre-adsorbed Inert Particles on Deposition of Metal Ions at the Initial Stage of Composite Electrodeposition

JI Renjie, LIU Shenggui, LIU Yonghong, JIN Hui, ZHANG Fan, CAI Baoping   

  1. College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao 266580
  • Received:2020-05-22 Revised:2020-10-18 Online:2021-03-05 Published:2021-04-28

Abstract: The effect of pre-adsorbed TiO2 particles on electrodeposition of nickel ions at the initial stage of composite electrodeposition has been studied. It is observed for the first time that pre-adsorbed TiO2 particles can cause abnormal nucleation and rapid growth of nickel ions at the initial stage of composite electrodeposition. A step-by-step electrodeposition method is proposed, and combined with cyclic voltammetry and electrochemical impedance spectroscopy, the effect of pre-adsorbed TiO2 particles on nickel ion deposition has been investigated. The results show that the pre-adsorbed TiO2 particles can increase the density of active sites and reduce the charge transfer resistance on the cathode surface, thereby accelerating the electrocrystallization step of adatoms. Moreover, a physical model of pre-adsorbed inert particles affecting the deposition of metal ions is established. This study provides a possibility of rapid deposition and vertical growth of metal ions, which is of great significance for revealing the mechanism and behavior of co-deposition between inert particles and metal ions in the process of composite electrodeposition.

Key words: composite electrodeposition, pre-adsorbed, inert particle, metal ion, nucleation

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