Comparison of the chemical composition of boron-doped diamond surfaces upon different oxidation processes

Characterization of the performance and failure mechanisms of boron-doped ultrananocrystalline diamond electrodes

“…The asdeposited BD-UNCD films had a low surface content of graphitic sp 2 C (2.3-2.7%), and C-OH (5.5-9.1%) and C=O (2-4%) functional groups. These results are similar to measurements made on as-deposited BD-MCD films by other research groups [19][20][21].…”

“…A decrease in the C-H sp 3 content was associated with an increase in C-OH and C=O functional groups, and also the emergence of carboxyl or ester groups. These results are typical for electrochemically oxidized BD-MCD films that are subjected to low applied charges of B1 C cm -2 [19][20][21][22]. However, in our study, the BD-UNCD/Si and BD-UNCD/Ta electrodes were subjected to an applied charge of 360,000 C cm -2 , documenting that the surface chemistry of the films was similar to those reported in the literature subjected to much lower applied charges.…”

Electrochemical impedance spectroscopy of polycrystalline boron doped diamond layers with hydrogen and oxygen terminated surface

“…S1 in Supplementary data). Quite often, the actually applied circuit is not specified in the source works [17][18][19][29][30][31] but we may assume that they employed the simplest Randles-type RC circuit with pure capacitor like in [23]. Denisenko et al [26] proposed a circuit with two RC elements in series, to account for a separation of space-charge layer and double layer at the interface.…”

The Use of Conducting Diamond in Electrochemistry

“…Grain structure (e.g., MC vs NC vs UNC) and NDC content will also play a role. For example, in one study, XPS showed that oxygen termination of BDD by anodic, UV, and plasma treatment all produced a low number of >C=O groups, with UV resulting in the largest percentage of C-OH groups compared to the other two oxidation processes [113]. In another investigation, it was shown that alumina polishing MC BDD resulted in C-OH, C-O-C, and C=O groups on the surface [17].…”