Journal
JOURNAL OF APPLIED ELECTROCHEMISTRY
Volume 40, Issue 10, Pages 1817-1827Publisher
SPRINGER
DOI: 10.1007/s10800-010-0139-1
Keywords
Boron-doped diamond electrodes; Cathodic pretreatment; Surface erosion; Surface activation; Electrochemical impedance spectroscopy
Categories
Funding
- CNPq
- CAPES
- FAPESP
Ask authors/readers for more resources
The electrochemical activation and physical degradation of boron-doped diamond (BDD) electrodes with different boron doping levels after repeated cathodic pretreatments are reported. Galvanostatic cathodic pretreatment passing up to -14000 C cm(-2) in steps of -600 C cm(-2) using -1 A cm(-2) caused significant physical degradation of the BDD surface, with film detachment in some areas. Because of this degradation, a great increase in the electrochemically active area was observed in Tafel plots for the hydrogen evolution reaction (HER) in acid media. The minimum cathodic pretreatment needed for the electrochemical activation of the BDD electrodes without producing any observable physical degradation on the BDD surfaces was determined using electrochemical impedance spectroscopy (EIS) measurements and cyclic voltammetry: -9 C cm(-2), passed at -1 A cm(-2). This optimized cathodic pretreatment can be safely used when electrochemical experiments are carried out on BDD electrodes with doping levels in the range between 800 and 8000 ppm.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available