Determination of the Maximum Vanadium Oxide Coverage on SnO2with a High Surface Area by Raman Spectroscopy

2002 ◽  
Vol 106 (51) ◽  
pp. 13273-13279 ◽  
Author(s):  
Stéphane Loridant
Keyword(s):  
Raman Spectroscopy ◽  
Vanadium Oxide ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area

Chemical and spectroscopic study of the nature of a vanadium oxide monolayer supported on a high-surface-area TiO2anatase

Langmuir ◽  
1986 ◽  
Vol 2 (5) ◽  
pp. 568-577 ◽  
Author(s):  
Guido. Busca ◽  
Gabriele. Centi ◽  
Leonardo. Marchetti ◽  
Ferruccio. Trifiro
Keyword(s):  
Vanadium Oxide ◽  
Spectroscopic Study ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area

Determination of PBP by Using a Nano SiO2/GC Modified Electrode

2011 ◽  
Vol 312-315 ◽  
pp. 138-142
Author(s):  
A. Shokuhi Rad
Keyword(s):  
Electrochemical Sensor ◽  
Surface Area ◽  
Modified Electrode ◽  
Electrochemical Sensors ◽  
High Surface ◽  
High Surface Area ◽  
Sio2 Film ◽  
Enhancement Effect ◽  
Nano Sio2

Recently, several metal oxide nanomaterials have been deposited on the surface of electrodes and investigated for the reduction/ oxidation and detection of some biological materials. Electrochemical Sensors with high surface area and porosity are important components in an irresistible wealth of systems for various applications. An electrochemical sensor for the sensitive determination of parabromophenol (PBP) was synthesized based on the nano-SiO2 film-modified electrode. Owing to the exceptional properties of nano-SiO2 such as successfully minimized transport limitations, huge surface area, strong adsorptive ability, subtle electronic properties and catalytic ability, the electrochemical oxidation signal of PBP significantly increases at the nano- SiO2/GC electrochemical sensor, suggesting that nano-SiO2 film exhibits obvious enhancement effect to the determination of PBP. Based on this, a sensitive electrochemical method was developed for the determination of PBP.

A biocompatible high surface area ZnO-based molecularly imprinted polymer for the determination of meloxicam in water media and plasma

2019 ◽  
Vol 43 (22) ◽  
pp. 8492-8501 ◽  
Author(s):  
Ensiyeh Rahmati ◽  
Zahra Rafiee
Keyword(s):  
Surface Area ◽  
Molecularly Imprinted Polymer ◽  
Solid Phase ◽  
High Surface ◽  
High Surface Area ◽  
Zno Nanoparticle ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Water Media

Ultrasound-assisted solid-phase microextraction (SPME) by a functionalized high surface area ZnO nanoparticle (NP)-based molecularly imprinted polymer (MIP) followed by UV-Vis spectrophotometry was described as a selective, economic and rapid technique which was established for the extraction and preconcentration of meloxicam (MEL) in water media and plasma.

Characterization of High Surface Area Silicon Oxynitrides

1992 ◽  
Vol 271 ◽  
Author(s):  
Peter W. Lednor ◽  
Rene De Ruiter ◽  
Kees A. Emeis
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Surface Area ◽  
Photoelectron Spectroscopy ◽  
High Surface ◽  
High Surface Area ◽  
X Ray ◽  
Silicon Oxynitrides

ABSTRACTHigh surface area silicon oxynitrides have been prepared by nitrida- tion of silica with ammonia. Characterization by Fourier-transform infrared spectroscopy has allowed quantitative determination of hydroxyl, amido and imido groups. Data obtained by X-ray photoelectron spectroscopy show that the nitrogen is well distributed in the surface of the materials.

Tenacious Mass Transfer Limitations Drive Catalytic Selectivity during Electrochemical Carbon Dioxide Reduction

2019 ◽  
Author(s):  
Kailun Yang ◽  
Recep Kas ◽  
Wilson A. Smith
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Catalyst Layer ◽  
Active Surface ◽  
Active Surface Area ◽  
High Concentration ◽  
Copper Electrodes ◽  
Surface Enhanced ◽  
Local Current

<p>This study evaluated the performance of the commonly used strong buffer electrolytes, i.e. phosphate buffers, during CO<sub>2</sub> electroreduction in neutral pH conditions by using in-situ surface enhanced infrared absorption spectroscopy (SEIRAS). Unfortunately, the buffers break down a lot faster than anticipated which has serious implications on many studies in the literature such as selectivity and kinetic analysis of the electrocatalysts. Increasing electrolyte concentration, surprisingly, did not extend the potential window of the phosphate buffers due to dramatic increase in hydrogen evolution reaction. Even high concentration phosphate buffers (1 M) break down within the potentials (-1 V vs RHE) where hydrocarbons are formed on copper electrodes. We have extended the discussion to high surface area electrodes by evaluating electrodes composed of copper nanowires. We would like highlight that it is not possible to cope with high local current densities on these high surface area electrodes by using high buffer capacity solutions and the CO<sub>2</sub> electrocatalysts are needed to be evaluated by casting thin nanoparticle films onto inert substrates as commonly employed in fuel cell reactions and up to now scarcely employed in CO<sub>2</sub> electroreduction. In addition, we underscore that normalization of the electrocatalytic activity to the electrochemical active surface area is not the ultimate solution due to concentration gradient along the catalyst layer.This will “underestimate” the activity of high surface electrocatalyst and the degree of underestimation will depend on the thickness, porosity and morphology of the catalyst layer. </p> <p> </p>

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