Detail publikace

Tailorable nanostructured mercury/gold amalgam electrode arrays with varied surface areas and compositions

PODEŠVA, P. LIU, X. PUMERA, M. NEUŽIL, P.

Originální název

Tailorable nanostructured mercury/gold amalgam electrode arrays with varied surface areas and compositions

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The mercury electrode is an attractive material for a working electrode due to its atomically smooth, self-healing surface and large potential window. Amalgams are attractive substitutes for toxic Hg in various electrochemical applications. They are typically prepared by mixing different metals with Hg, or by electrodeposition of Hg on the metals' surfaces. These methods offer little to no control of the amalgam compositions and morphology, which is a major disadvantage of their usage. Here, we show a highly controllable method used to fabricate an array of nanostructured Au amalgam electrodes in a single step, with tailored sensitivity and composition. This method is based on the direct electrochemical co-deposition of Au and Hg from their cyano complexes, which results in branched AuxHgy structures with controlled ratios between both metals. We investigated the effects of solution composition and deposition potential on the electroactive surface area, its morphology, and the electrode potential window. The nanostructured amalgam could replace the Hg electrode for heavy metal detection with high sensitivity, due to its enhanced area and potential window similar to that of Hg. This method of in situ wet-chemistry fabrication of the Hg/Au amalgam, with tailorable nanostructure and composition, opens the door to a renaissance of Hg-based electrodes.

Klíčová slova

Array of microelectrodes; Gold amalgam; Single step deposition; Composition; Topography control

Autoři

PODEŠVA, P.; LIU, X.; PUMERA, M.; NEUŽIL, P.

Vydáno

1. 1. 2020

Nakladatel

ELSEVIER SCIENCE SA

Místo

LAUSANNE, SWITZERLAND

ISSN

0925-4005

Periodikum

Sensors and Actuators B: Chemical

Ročník

302

Číslo

NA

Stát

Švýcarská konfederace

Strany od

1

Strany do

6

Strany počet

6

URL

https://www.sciencedirect.com/science/article/pii/S0925400519313747

BibTex

@article{BUT159952,
  author="PODEŠVA, P. and LIU, X. and PUMERA, M. and NEUŽIL, P.",
  title="Tailorable nanostructured mercury/gold amalgam electrode arrays with varied surface areas and compositions",
  journal="Sensors and Actuators B: Chemical",
  year="2020",
  volume="302",
  number="NA",
  pages="1--6",
  doi="10.1016/j.snb.2019.127175",
  issn="0925-4005",
  url="https://www.sciencedirect.com/science/article/pii/S0925400519313747"
}