A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection

Abstract 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...

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Autores principales:	Maeve H. S. McLaughlin, Alexander C. Pakpour-Tabrizi, Richard B. Jackman
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c57a92817a914f04a642af80c3eae6fe
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spelling	oai:doaj.org-article:c57a92817a914f04a642af80c3eae6fe2021-12-02T14:49:33ZA detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection10.1038/s41598-021-89045-22045-2322https://doaj.org/article/c57a92817a914f04a642af80c3eae6fe2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89045-2https://doaj.org/toc/2045-2322Abstract 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.Maeve H. S. McLaughlinAlexander C. Pakpour-TabriziRichard B. JackmanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maeve H. S. McLaughlin Alexander C. Pakpour-Tabrizi Richard B. Jackman A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
description	Abstract 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.
format	article
author	Maeve H. S. McLaughlin Alexander C. Pakpour-Tabrizi Richard B. Jackman
author_facet	Maeve H. S. McLaughlin Alexander C. Pakpour-Tabrizi Richard B. Jackman
author_sort	Maeve H. S. McLaughlin
title	A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
title_short	A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
title_full	A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
title_fullStr	A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
title_full_unstemmed	A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
title_sort	detailed eis study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c57a92817a914f04a642af80c3eae6fe
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A detailed EIS study of boron doped diamond electrodes decorated with gold nanoparticles for high sensitivity mercury detection

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