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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Electrochemistry of Ruthenium Purple Confined in a Polymer Matrix: Voltammetry, Electrocatalysis of Hydrogen Evolution, and Electron-Transport Characteristics
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Electrochemistry of Ruthenium Purple Confined in a Polymer Matrix: Voltammetry, Electrocatalysis of Hydrogen Evolution, and Electron-Transport Characteristics

机译：封闭在聚合物基体中的紫色钌的电化学：伏安法，氢析出的电催化作用和电子传输特性

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摘要

The synthesis of iron(III) ruthenocyanide (Ruthenium Purple, RP) in a Nafion (Nf) membrane was carried out. The visible-light absorption spectrum of the resulting RP exhibited an inter-valent charge-transfer band around 550-570 nm similar to that of neat RP, evidently showing that RP is formed in a polymer matrix. The voltammetric characteristics of the RP confined in the Nf matrix (Nf[RP]) were investigated compared with the neat RP. When Nf[RP] was used as an electrocatalyst to reduce H~+, efficient H_2 formation was found to originate from its molecular catalysis. In order to investigate the dominant factor that affects the overall kinetics in H~+ reduction catalysis, the dependencies of both the catalytic activity (represented by the turnover number (TN) of a RP unit) and the diffusion coefficient of electron (D_(app)) were studied as a function of the RP concentration in the matrix. The D_(app) value decreased with increasing the concentration. The dependence of TN on the concentration was similar to that of D_(app), indicating that the overall kinetics is dominated by electron transport by RP.
机译：在Nafion（Nf）膜中进行了钌铁氰化铁（III）的合成。所得RP的可见光吸收光谱显示出与纯RP相似的在550-570nm附近的共价电荷转移带，显然表明RP在聚合物基质中形成。与纯净RP相比，研究了Nf基质（Nf [RP]）中封闭的RP的伏安特性。当Nf [RP]用作还原H〜+的电催化剂时，发现有效的H_2形成源自其分子催化作用。为了研究影响H〜+还原催化的整体动力学的主要因素，催化活性（由RP单元的周转数（TN）表示）和电子的扩散系数（D_（app ））作为基质中RP浓度的函数进行了研究。 D_（app）值随浓度增加而降低。 TN对浓度的依赖性与D_（app）相似，表明整体动力学主要受RP的电子传输作用。

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