Unusual Electrochemical Properties of Low-Doped Boron-Doped Diamond Electrodes Containing sp2 Carbon
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-01-13 |
| Journal | Journal of the American Chemical Society |
| Authors | Jing Xu, Yasuyuki Yokota, Raymond A. Wong, Yousoo Kim, Yasuaki Einaga |
| Institutions | Keio University, RIKEN |
| Citations | 121 |
Abstract
Section titled āAbstractāUnexpected phenomena displayed by low-boron-doped diamond (BDD) electrodes are disclosed in the present work. Generally, the presence of sp<sup>2</sup> nondiamond carbon impurities in BDD electrodes causes undesirable electrochemical properties, such as a reduced potential window and increased background current, etc. However, we found that the potential window and redox reaction in normally doped (1%) BDD and low-doped (0.1%) BDD exhibited opposite tendencies depending on the extent of sp<sup>2</sup> carbon. Moreover, we found that contrary to the usual expectations, low-doped BDD containing sp<sup>2</sup> carbon hinders electron transfer, whereas in line with expectations, normally doped BDD containing sp<sup>2</sup> exhibits enhanced electron transfer. Surface analyses by X-ray/ultraviolet photoelectron spectroscopy (XPS/UPS) and electrochemical methods are utilized to explain these unusual phenomena. This work indicates that the electrochemical properties of low-doped BDD containing sp<sup>2</sup> might be due partially to the high level of surface oxygen, the large work function, the low carrier density, and the existence of different types of sp<sup>2</sup> carbon.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2005 - Diamond Electrochemistry