Journal of the Brazilian Chemical Society | |
Ultramicroelectrode array behavior of electrochemically partially blocked boron-doped diamond surface | |
Giancarlo R. Salazar-banda2  Katlin I. B. Eguiluz2  Adriana E. De Carvalho1  Luis A. Avaca1  | |
[1] ,Universidade Tiradentes Instituto de Tecnologia e Pesquisa Programa de Pós-Graduação em Engenharia de ProcessosAracaju SE ,Brazil | |
关键词: surface termination; anodic polarization; cathodic polarization; spherical diffusion; cyclic voltammetry; | |
DOI : 10.5935/0103-5053.20130141 | |
来源: SciELO | |
【 摘 要 】
It is demonstrated, for the first time using simple cyclic voltammetry experiments, that the anodic pre-polarization of boron-doped diamond electrodes (BDD) leads to partially blocked surfaces. Anodically pre-polarized BDD electrodes, with different boron-doping levels, presented sigmoidal cyclic voltammetry profiles to the ferro/ferri-cyanide redox couple under low scan rate (0.5 mV s-1). On the other hand, when the same electrodes are cathodically pre-polarized, quasi-reversible and reversible responses were observed under the same scan rate, corresponding to surfaces with heterogeneous electroactivity. Thus, BDD surfaces can act as partially blocked or with heterogeneous electroactivity, depending on the polarization, anodic or cathodic, respectively.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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