Silver-Nafion coated cylindrical carbon fiber microelectrode for amperometric monitoring of hydrogen peroxide heterogeneous catalytic decomposition

Halouzka, Vladimír; Jakubec, Petr; Gregor, Čeněk; Jančík, Dalibor; Papadopoulos, Kyriakos; Triantis, Theodoros M.; Hrbáč, Jan

doi:10.1016/j.cej.2010.10.023

Cited by 18 publications

(12 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our experiments, the electrolysis is accompanied by the pH increase from pH = 7 up to pH = 10.5. This is in an accord with the available literature data for Ag 2 O solubility product in water in the range of 23,29 Ks = 1.52 × 10 −8 − 1.94 × 10 −8 , [6] corresponding to 1.2-1.4 × 10 −4 M of free Ag + ions in the interelectrode space, i.e. an amount high enough to produce a silver film on the cathode in a relatively short time of 10-30 minutes.…”

Section: Resultssupporting

confidence: 91%

“…Monitoring hydrogen peroxide in industrial processes may require sensing high concentrations of hydrogen peroxide over extended periods of time. In our earlier work, 6 we demonstrated that porous silver layer coated electrodes are sufficiently stable (hours) to sense high concentrations of hydrogen peroxide (up to 0.1 M) with sufficient linearity. Such an extended linear region of amperometric sensing is typical for nanoparticle coated surfaces, the linearity limit of bulk silver metal electrodes is ca.…”

mentioning

confidence: 96%

See 1 more Smart Citation

Deposition of Nanostructured Ag Films on Silicon Wafers by Electrochemical/Electrophoretic Deposition for Electrochemical and SERS Sensing

Halouzka

Jakubec

Kvı́tek

et al. 2013

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Electrolysis of ultrapure water in a two-electrode cell with silver anode and conductive substrate (Si wafer) as a cathode leads to the formation of nanostructured silver layers deposited on cathode. In the process, the silver anode is electrochemically dissolved to silver cations, which react with water (or OH • radicals derived from water electrolysis) forming silver oxide nanoparticles, which fill the interelectrode space by electrophoretic movement, diffusion and convection induced by temperature effects of electrolysis. During the process the silver oxide nanoparticles are partially transformed into silver nanoparticles. On the cathode, silver cations and silver / silver oxide nanoparticles undergo reduction to form nanostructured silver film. The results of the present study open a new, extremely simple and ultra-low cost way to prepare nanostructured silver films on conducting and semiconducting substrates. The prepared nanosilver coated silicon substrates exhibit high performances as amperometric sensors for hydrogen peroxide and also as SERS substrates.The marked progress in the development of efficient and reproducible synthetic routes of well separated and stable nanoparticles via size and shape engineering during the past decade 1,2 has been currently succeeded by intensive research efforts focused on the deposition of organized nanoparticles' assemblies on the surface of solid substrates, suitable for specific applications. 3,4 Deposition of nanostructured metallic layers (including noble metals) on conductive and/or semiconducting substrates is a specific issue of this research direction, 5 targeted into the development of novel, highly sensitive electrochemical and surface enhanced Raman scattering (SERS) sensors.Silver, especially in the form of nanoparticles, is a highly effective electrocatalyst for cathodic hydrogen peroxide sensing. Amperometric hydrogen peroxide sensors find their use in the design of biosensors based on oxidase enzymes, which yield hydrogen peroxide as a result of the oxidase catalyzed substrate oxidation by oxygen. For this purpose, sensors working in the cathodic region of potentials have an inherent advantage due to their insensitivity to easily oxidisable compounds (e.g. ascorbic acid, uric acid, polyphenols etc.), often present in high quantities in biological matrices. Monitoring hydrogen peroxide in industrial processes may require sensing high concentrations of hydrogen peroxide over extended periods of time. In our earlier work, 6 we demonstrated that porous silver layer coated electrodes are sufficiently stable (hours) to sense high concentrations of hydrogen peroxide (up to 0.1 M) with sufficient linearity. Such an extended linear region of amperometric sensing is typical for nanoparticle coated surfaces, the linearity limit of bulk silver metal electrodes is ca. 20x lower.Nanostuctured metal films, of which silver films are of primary interest, also find an ideal application as substrates for surface-enhanced Raman spectroscopy, a highly sensitive and specific in...

show abstract

Section: Resultssupporting

confidence: 91%

mentioning

confidence: 96%

Deposition of Nanostructured Ag Films on Silicon Wafers by Electrochemical/Electrophoretic Deposition for Electrochemical and SERS Sensing

Halouzka

Jakubec

Kvı́tek

et al. 2013

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Many researchers have chosen to electrodeposit metals onto untreated substrates in order to maintain an overall clean surface, thereby avoiding possible complications in later applications with surface capping organic moieties. In particular, recent research in the sensor field has focussed on the electrodeposition of several of the noble metals as a sensing layer, in particular gold, [13][14][15][16][17][18][19] silver [20][21][22][23][24] and platinum. [25][26][27][28] An example of hierarchical nanostructured gold is shown in Fig.…”

Section: Electrodeposition Of Nanomaterials At Untreated Surfacesmentioning

confidence: 99%

Electrochemical fabrication of metallic nanostructured electrodes for electroanalytical applications

Plowman

Bhargava

O’Mullane

2011

Analyst

View full text Add to dashboard Cite

The use of electrodeposited metal-based nanostructures for electroanalytical applications has recently received widespread attention. There are several approaches to creating nanostructured materials through electrochemical routes that include facile electrodeposition at either untreated or modified electrodes, or through the use of physical or chemical templating methods. This allows the shape, size and composition of the nanomaterial to be readily tuned for the application of interest. The use of such materials is particularly suited to electroanalytical applications. In this mini-review an overview of recently developed nanostructured materials developed through electrochemical routes is presented as well as their electroanalytical applications in areas of biological and environmental importance.

show abstract

“…Meanwhile, the Naon layer also helps to protect the electrode from interference of some active substances such as uric acid (UA) and ascorbic acid (AA) due to its well-known ion exchange properties. 31 3. Results and discussion…”

Section: Fabrication Of the Modied Electrodementioning

confidence: 99%

Amperometric detection of hydrogen peroxide using a nanofibrous membrane sputtered with silver

Luo

Pang

et al. 2014

RSC Adv.

View full text Add to dashboard Cite

Silver-Nafion coated cylindrical carbon fiber microelectrode for amperometric monitoring of hydrogen peroxide heterogeneous catalytic decomposition

Cited by 18 publications

References 18 publications

Deposition of Nanostructured Ag Films on Silicon Wafers by Electrochemical/Electrophoretic Deposition for Electrochemical and SERS Sensing

Deposition of Nanostructured Ag Films on Silicon Wafers by Electrochemical/Electrophoretic Deposition for Electrochemical and SERS Sensing

Electrochemical fabrication of metallic nanostructured electrodes for electroanalytical applications

Amperometric detection of hydrogen peroxide using a nanofibrous membrane sputtered with silver

Contact Info

Product

Resources

About