A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection.
A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection.
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DOI：
10.1038/s41598-021-89045-2
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发表时间：
2021-05-04
影响因子：
4.6
通讯作者：
Jackman RB
中科院分区：
文献类型：
--
作者：
McLaughlin MHS;Pakpour-Tabrizi AC;Jackman RB
这项工作比较了抛光和未抛光的掺硼金刚石（BDD）电极的电化学阻抗响应，在汞检测测量。对于每种基底类型，使用裸电极和用平均直径30纳米金纳米颗粒装饰的电极，以研究金纳米颗粒在金刚石电极汞传感过程中的作用。在用于汞检测的方波阳极溶出伏安法（SWASV）测量中，电解质中的汞离子沉积在金刚石电极表面上，然后从金刚石电极表面剥离。为了研究在这些步骤期间的不同电极性能，在沉积和剥离电位下进行EIS测量，同时在开路电位下进行扫描以进行比较。根据电极的电子转移速率（k 0）评估电极的性能。修饰有AuNP的电极显示出比裸pBDD和BDD电极具有更低的电容和更高的反应性，直到电解质中的汞浓度< 500 µM，此时电极表面的sp2/sp3碳比对汞检测灵敏度的影响大于AuNP的存在。
This work compares the electrochemical impedance response of polished and unpolished boron doped diamond (BDD) electrodes, during mercury detection measurements. For each substrate type both bare electrodes and electrodes decorated with average diameter 30 nm AuNPs were used, to investigate the role of AuNPs during mercury sensing with diamond electrodes. In square wave anodic stripping voltammetry (SWASV) measurements for mercury detection, the mercury ions in the electrolyte are deposited onto, then stripped from the diamond electrode surface. To investigate the different electrode performances during these steps, the EIS measurements were made at the deposition and stripping potentials, alongside scans at open circuit potential for comparison. The performance of the electrodes is assessed in terms of their electron transfer rate (k0). The electrodes decorated with AuNPs are shown to have lower capacitance and higher reactivity than the bare pBDD and BDD electrodes, until the mercury concentration in the electrolyte is < 500 µM, when the sp2/sp3 carbon ratio at the surface of the electrodes has a greater influence on the sensitivity for mercury detection than the presence of AuNPs.
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影响因子：
4.1
作者：
Leeds, SM;Davis, TJ;Ashfold, MNR
通讯作者：
Ashfold, MNR
影响因子：
3.9
作者：
Kiran, Raphael;Scorsone, Emmanuel;Bergonzo, Philippe
通讯作者：
Bergonzo, Philippe
影响因子：
6.2
作者：
Petovar, Barbara;Xhanari, Klodian;Finsgar, Matjaz
通讯作者：
Finsgar, Matjaz
影响因子：
4
作者：
AGER, JW;WALUKIEWICZ, W;LANDSTRASS, MI
通讯作者：
LANDSTRASS, MI
DOI：
10.1098/rsta.2004.1451
发表时间：
2004-11-15
期刊：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
影响因子：
--
作者：
Prawer, S;Nemanich, RJ
通讯作者：
Nemanich, RJ