Abstract
Boron-doped diamond (BDD) has attracted much attention as a promising electrode material especially for electrochemical sensing systems, because it has excellent properties such as a wide potential window and low background current. It is known that the electrochemical properties of BDD electrodes are very sensitive to the surface termination such as to whether it is hydrogen- or oxygen-terminated. Pretreating BDD electrodes by cathodic reduction (CR) to hydrogenate the surface has been widely used to achieve high sensitivity. However, little is known about the effects of the CR treatment conditions on surface hydrogenation. In this Article, we report on a systematic study of CR treatments that can achieve effective surface hydrogenation. As a result, we found that the surface hydrogenation could be improved by applying a more negative potential in a lower pH solution. This is because hydrogen atoms generated from protons in the CR treatment contribute to the surface hydrogenation. After CR treatments, BDD surface could be hydrogenated not completely but sufficiently to achieve high sensitivity for electrochemical sensing. In addition, we confirmed that hydrogenation with high repeatability could be achieved.
| Original language | English |
|---|---|
| Pages (from-to) | 11341-11347 |
| Number of pages | 7 |
| Journal | Analytical chemistry |
| Volume | 89 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 2017 Nov 7 |
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ASJC Scopus subject areas
- Analytical Chemistry
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Surface Hydrogenation of Boron-Doped Diamond Electrodes by Cathodic Reduction. / Kasahara, Seiji; Natsui, Keisuke; Watanabe, Takeshi; Yokota, Yasuyuki; Kim, Yousoo; Iizuka, Shota; Tateyama, Yoshitaka; Einaga, Yasuaki.
In: Analytical chemistry, Vol. 89, No. 21, 07.11.2017, p. 11341-11347.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Surface Hydrogenation of Boron-Doped Diamond Electrodes by Cathodic Reduction
AU - Kasahara, Seiji
AU - Natsui, Keisuke
AU - Watanabe, Takeshi
AU - Yokota, Yasuyuki
AU - Kim, Yousoo
AU - Iizuka, Shota
AU - Tateyama, Yoshitaka
AU - Einaga, Yasuaki
PY - 2017/11/7
Y1 - 2017/11/7
N2 - Boron-doped diamond (BDD) has attracted much attention as a promising electrode material especially for electrochemical sensing systems, because it has excellent properties such as a wide potential window and low background current. It is known that the electrochemical properties of BDD electrodes are very sensitive to the surface termination such as to whether it is hydrogen- or oxygen-terminated. Pretreating BDD electrodes by cathodic reduction (CR) to hydrogenate the surface has been widely used to achieve high sensitivity. However, little is known about the effects of the CR treatment conditions on surface hydrogenation. In this Article, we report on a systematic study of CR treatments that can achieve effective surface hydrogenation. As a result, we found that the surface hydrogenation could be improved by applying a more negative potential in a lower pH solution. This is because hydrogen atoms generated from protons in the CR treatment contribute to the surface hydrogenation. After CR treatments, BDD surface could be hydrogenated not completely but sufficiently to achieve high sensitivity for electrochemical sensing. In addition, we confirmed that hydrogenation with high repeatability could be achieved.
AB - Boron-doped diamond (BDD) has attracted much attention as a promising electrode material especially for electrochemical sensing systems, because it has excellent properties such as a wide potential window and low background current. It is known that the electrochemical properties of BDD electrodes are very sensitive to the surface termination such as to whether it is hydrogen- or oxygen-terminated. Pretreating BDD electrodes by cathodic reduction (CR) to hydrogenate the surface has been widely used to achieve high sensitivity. However, little is known about the effects of the CR treatment conditions on surface hydrogenation. In this Article, we report on a systematic study of CR treatments that can achieve effective surface hydrogenation. As a result, we found that the surface hydrogenation could be improved by applying a more negative potential in a lower pH solution. This is because hydrogen atoms generated from protons in the CR treatment contribute to the surface hydrogenation. After CR treatments, BDD surface could be hydrogenated not completely but sufficiently to achieve high sensitivity for electrochemical sensing. In addition, we confirmed that hydrogenation with high repeatability could be achieved.
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UR - http://www.scopus.com/inward/citedby.url?scp=85048629486&partnerID=8YFLogxK
U2 - 10.1021/acs.analchem.7b02129
DO - 10.1021/acs.analchem.7b02129
M3 - Article
C2 - 28994580
AN - SCOPUS:85048629486
VL - 89
SP - 11341
EP - 11347
JO - Analytical Chemistry
JF - Analytical Chemistry
SN - 0003-2700
IS - 21
ER -