A study on Ti anodic pretreatment for improving the stability of electrodeposited IrO2 electrode

Dandan Wu, Xu Wu, Yanlin Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

The anodization pretreatment, in hydrofluoric acid with different concentrations, was applied on titanium for improving the stability of electrodeposited IrO2/Ti electrodes. A developed plating bath was adopted to electrodeposit IrO2 on titanium substrates pretreated by three different pretreatment methods. The morphological characteristics, microstructure, electro-catalytic activities, and stability of electrodeposit IrO2 electrodes were observed and examined. In all cases, the hydrofluoric acid anodization improved the homogeneity and evenness of titanium substrates as well as the deposits. Among all samples, the electrodes with 1.0 wt% HF anodization exhibited the highest electro-catalytic activities and the ones with 0.5 wt% HF anodization exhibited the longest accelerate life time. The results indicate that anodization pretreatment in hydrofluoric acid has certain impacts on electrodeposited IrO2/Ti electrodes, although the effects depend on HF concentration. It might be suggested that a porous-structure was generated on titanium surface with hydrofluoric acid anodization, which may influence IrO2 electrodeposition, and thus the electro-catalytic activities and stability of such electrodes.

Original languageEnglish
Article number135793
JournalElectrochimica Acta
Volume338
DOIs
Publication statusPublished - 1 Apr 2020
Externally publishedYes

Keywords

  • Accelerate life test
  • Anodization
  • Electrodeposition
  • Iridium oxide electrode

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry

Fingerprint

Dive into the research topics of 'A study on Ti anodic pretreatment for improving the stability of electrodeposited IrO2 electrode'. Together they form a unique fingerprint.

Cite this