Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/24002
Title: | Boron-doped Diamond Electrodes: Electrochemical, Atomic Force Microscopy and Raman Study towards Corrosion-modifications at Nanoscale | Authors: | Kavan, Ladislav Zivcova, Zuzana Vlckova Petrak, Vaclav Frank, Otakar Janda, Pavel Tarabkova, Hana NESLADEK, Milos MORTET, Vincent |
Issue Date: | 2015 | Source: | ELECTROCHIMICA ACTA, 179, p. 626-636 | Abstract: | Comparative studies of boron-doped diamonds electrodes (polycrystalline, single-crystalline, H-/O-terminated, and with different sp3/sp2 ratios) indicate morphological modifications of diamond which are initiated by corrosion at nanoscale. In-situ electrochemical AFM imaging evidences that the textural changes start at non-diamond carbonaceous impurity sites treated at high positive potentials (>2.2 V vs. Ag/AgCl). The primary perturbations subsequently develop into sub-micron-sized craters. Raman spectroscopy shows that the primary erosion site is graphite-like (sp2-carbon), which is preferentially removed by anodic oxidation. Other non-diamond impurity, viz. tetrahedral amorphous carbon (t-aC), is less sensitive to oxidative decomposition. The diamond-related Raman features, including the B-doping-assigned modes, are intact during reversible electrochemical charging/discharging, which is a salient difference from all usual sp2-carbons. The electrochemical oxidation partly transforms a hydrogen-terminated diamond surface to O-terminated one, but the electrocatalytic activity of plasmatically O-terminated diamond is not achieved for a model redox couple, Fe3+/2+. Electrochemical impedance spectra were fitted to six different equivalent circuits. The determination of acceptor concentrations is feasible even for highly-doped diamond electrodes. | Keywords: | boron doped diamond; electrochemical impedance spectroscopy; atomic force microscopy; Raman; spectroelectrochemistry | Document URI: | http://hdl.handle.net/1942/24002 | ISSN: | 0013-4686 | e-ISSN: | 1873-3859 | DOI: | 10.1016/j.electacta.2015.04.124 | ISI #: | 000362292200074 | Rights: | (c) 2015 Elsevier Ltd. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
aa.pdf Restricted Access | Published version | 3.42 MB | Adobe PDF | View/Open Request a copy |
SCOPUSTM
Citations
20
checked on Sep 3, 2020
WEB OF SCIENCETM
Citations
35
checked on Oct 14, 2024
Page view(s)
72
checked on Sep 5, 2022
Download(s)
42
checked on Sep 5, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.