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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Electrochemical Stability of Few-Layered Phosphorene Flakes on Boron-Doped Diamond: A Wide Potential Range of Studies in Aqueous Solutions
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Electrochemical Stability of Few-Layered Phosphorene Flakes on Boron-Doped Diamond: A Wide Potential Range of Studies in Aqueous Solutions

机译：硼掺杂金刚石上少量磷烯片的电化学稳定性：水溶液中宽潜在的研究范围

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摘要

Two-dimensional phosphorene has attracted great interest since its discovery as a result of its extraordinary properties. Two-dimensional single crystals of phosphorene can be useful for electrochemical (EC) sensing applications due to their enhanced surface-to-volume ratio. We proposed to investigate the electrochemical performance of phosphorene deposited directly on boron-doped diamond (BDD) electrodes. Noncovalent interaction of phosphorene with BDD was achieved due to van der Waals interactions. This extends the potential range of EC studies in aqueous solutions due to the extraordinary wide range of the BDD potential window (-2 to 2.5 V vs Ag vertical bar AgCl vertical bar 3M KCl). Cyclic voltammetry studies demonstrated irreversible electrochemical oxidation of the phosphorene, with peaks observed at different potentials depending on the sonication power during the liquid exfoliation of black phosphorus (BP). This indicated the formation of polyphosphoric quasi-oxide layers with undefined oxidation states of phosphorus. Electrochemical impedance spectroscopy showed the second time constant for high-power sonicated BP, which was attributed to PxOy(OH)(z) formation. The subsequent film was responsible for limiting the charge transfer rate. The BDD enabled the EC behavior of phosphorene to be studied at high anodic potentials.
机译：由于其非凡的性质，自发现以来，二维磷烯已经吸引了极大的兴趣。由于其增强的表面到体积比，磷烯的二维单晶可用于电化学（EC）感测应用。我们提出研究直接沉积在硼掺杂金刚石（BDD）电极上的磷烯的电化学性能。由于范德华相互作用，亚磷烯与BDD的非共价相互作用。这延长了由于BDD电位窗口的非凡范围（-2至2.5V VS Ag垂直条AgCl垂直条3M KCl），因此延长了水溶液中的EC研究的潜在范围。循环伏安法研究表明了磷烯的不可逆电化学氧化，在不同电位下观察到的峰，这取决于黑磷（BP）液体去角质期间的超声波功率。这表明形成具有未定义的氧化态的多磷酸盐准氧化物层。电化学阻抗光谱显示为高功率超声物BP的第二时间常数，其归因于PXOY（OH）（Z）形成。随后的薄膜负责限制电荷转移率。 BDD使磷烯的EC行为能够在高阳极电位下进行研究。

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