Hydroxyl groups on boron-doped diamond electrodes and their modification with a silane coupling agent
Hydroxyl groups on boron-doped diamond electrodes and their modification with a silane coupling agent
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DOI：
10.1149/1.1346556
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发表时间：
2001-03-01
影响因子：
--
通讯作者：
Fujishima, A
中科院分区：
文献类型：
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作者：
Notsu, H;Fukazawa, T;Fujishima, A
通过阳极极化或氧等离子体处理，可以在多晶掺硼金刚石（BDD）电极表面引入含氧官能团。其中，羟基是特别感兴趣的，并且可以通过用3-氨丙基三乙氧基硅烷（APTES）进行特定的化学改性来具体研究。与氧化表面的阻滞相比，用APTES修饰表面羟基加速了[Fe（CN）（6）]（3-/4-）氧化还原反应。这些变化可以用表面官能团与[Fe（CN）（6）]（3-/4-）阴离子之间的静电相互作用的变化来解释。特别是，[Fe（CN）（6）]（3-/4-）和质子化氨基之间的静电吸引力在APTES处理的表面应该负责的加速。这些结果，以及在接触角测量和X-射线光电子测量中获得的那些结果，表明在氧化的BDD表面上产生羟基，并且它们可以用硅烷偶联剂进行改性以将各种官能度引入到BDD电极表面上。(C)2001年电化学学会。
Oxygen-containing functional groups can be introduced onto the surface of polycrystalline boron-doped diamond (BDD) electrodes by either anodic polarization or oxygen plasma treatment. Of these, the hydroxyl groups are of particular interest and can be studied specifically by means of specific chemical modification with 3-aminopropyltriethoxysilane (APTES). The modification of the surface hydroxyl groups with APTES accelerates the [Fe(CN)(6)](3-/4-) redox reaction, compared to the retardation by the oxidized surface. These changes can be explained in terms of changes in the electrostatic interaction between the surface functional groups and the [Fe(CN)(6)](3-/4-) anion. In particular, electrostatic attraction between [Fe(CN)(6)](3-/4-) and protonated amino groups at the APTES-treated surfaces should be responsible for the acceleration. These results, as well as those obtained in contact angle measurements and X-ray photoelectron measurements, indicate that hydroxyl groups are generated on the oxidized BDD surfaces and that they can be modified with silane coupling agents for introduction of various functionalities onto the BDD electrode surface. (C) 2001 The Electrochemical Society.