Electrochemical characterization of hydrous ruthenium oxide nanoparticle decorated boron-doped diamond electrodes
Electrochemical characterization of hydrous ruthenium oxide nanoparticle decorated boron-doped diamond electrodes
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DOI：
10.1149/1.1497515
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发表时间：
2002-09-01
影响因子：
--
通讯作者：
Marken, F
中科院分区：
文献类型：
--
作者：
McKenzie, KJ;Marken, F
研究了水合氧化钌以纳米颗粒形式吸附在抛光的掺硼金刚石（BDD）衬底上的电化学性质。制备了平均直径为8-14 nm（A型）和1-2 nm（B型）的两种不同尺寸的水合氧化钌纳米颗粒，并显示出易于以单层形式吸附在抛光的BDD电极表面上。BDD电极的电化学惰性特性和明确的电极表面积允许定量研究纳米颗粒层的性质并观察新的电化学特征。归因于水合氧化钌（III）转化为水合氧化钌（IV）的显著氧化峰出现在0.82V（相对于pH 7的饱和甘汞电极）处。在很宽的pH范围内（1至13）的能斯特pH值依赖性的峰值电位是一致的氧化伴随着同时驱逐一个当量的质子。在阴极“活化”后，两种类型的纳米颗粒水合氧化钌（B型比A型更有效）催化析氢反应。(C)2002年电化学学会。
The electrochemical properties are explored of hydrous ruthenium oxide adsorbed in form of nanoparticles onto polished boron-doped diamond (BDD) substrates. Hydrous ruthenium oxide nanoparticles are prepared in two different sizes of average diam 8-14 nm (type A) and 1-2 nm (type B), and are shown to readily adsorb in form of a monolayer on polished BDD electrode surfaces. The electrochemically inert character and well-defined electrode surface area of the BDD electrodes allow properties of the nanoparticle layer to be investigated quantitatively and new electrochemical features to be observed. A prominent oxidation peak attributed to the conversion of the hydrous ruthenium (III) oxide to hydrous ruthenium(IV) oxide occurs at 0.82 V vs. saturated calomel electrode at pH 7. The Nernstian pH dependence of the peak potential over a wide pH range (1 to 13) is consistent with an oxidation accompanied by simultaneous expulsion of one equivalent of protons. After cathodic "activation,'' both types of nanoparticulate hydrous ruthenium oxide (type B more efficiently than type A) catalyze the hydrogen evolution reaction. (C) 2002 The Electrochemical Society.