Boron-doped {113}, {115} and {118}-oriented single-crystal diamond electrodes: Effect of surface pre-treatment

0575958 - FZÚ 2024 RIV GB eng J - Článek v odborném periodiku
Čambal, P. - Baluchová, S. - Taylor, Andrew - Míka, L. - Vondráček, Martin - Gedeonová, Zuzana - Hubík, Pavel - Mortet, Vincent - Schwarzová-Pecková, K.
Boron-doped {113}, {115} and {118}-oriented single-crystal diamond electrodes: Effect of surface pre-treatment.
Electrochimica acta. Roč. 469, Nov (2023), č. článku 143214. ISSN 0013-4686. E-ISSN 1873-3859
Grant CEP: GA ČR(CZ) GA20-03187S; GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LM2018110
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: boron doping level * crystal orientation * electrochemical pre-treatment * single-crystal boron doped diamond * surface termination
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 6.6, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.electacta.2023.143214

In this study, the effect of vicinal crystal orientation ({113}, {115}, and {118}), boron doping level, and surface termination induced by various pre-treatments on electrical and electrochemical properties of single crystal boron-doped diamond (SC-BDD) electrodes was carefully investigated. van de Pauw measurements confirmed Hall concentration to increase with increasing vicinal angle, {118} < {115} < {113}. As-deposited H-terminated surfaces were converted to predominantly O-terminated surfaces (confirmed by X-ray photoelectron spectroscopy) using hot acid, ozone and anodic pre-treatments, or by spontaneous oxidation in air. This conversion was recognized by inhibited heterogeneous electron transfer kinetics of inner-sphere redox markers ([Fe(CN)6]3−/4− and dopamine), by an increase in double layer capacitance and charge transfer resistance values. The most pronounced surface oxidation was recognized for electrodes with the lowest boron content as a result of blocked boron atoms by oxygen functionalities and loss of superficial hydrogen on the surface.
Trvalý link: https://hdl.handle.net/11104/0345638