Electrochemical impedance study of the polymerization of pyrrole on high surface area carbon electrodes

2010 ◽  
Vol 12 (18) ◽  
pp. 4733 ◽  
Author(s):  
Reza B. Moghaddam ◽  
Peter G. Pickup
Keyword(s):  
Surface Area ◽  
Electrochemical Impedance ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Electrodes ◽  
Impedance Study

Electrocatalysis on Oxide-Stabilized, High-Surface Area Carbon Electrodes

ACS Catalysis ◽  
2013 ◽  
Vol 3 (8) ◽  
pp. 1850-1854 ◽  
Author(s):  
Manuel A. Méndez ◽  
Leila Alibabaei ◽  
Javier J. Concepcion ◽  
Thomas J. Meyer
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Electrodes

scholarly journals High Surface Area Carbon Electrodes for Bromine Reactions in H2-Br2Fuel Cells

2015 ◽  
Vol 163 (1) ◽  
pp. A5126-A5133 ◽  
Author(s):  
Venkata Yarlagadda ◽  
Guangyu Lin ◽  
Pau Ying Chong ◽  
Trung Van Nguyen
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Electrodes

Characterization of Sol-Gel Derived Composite Silica Carbon Electrodes

1994 ◽  
Vol 346 ◽  
Author(s):  
Genia Gun ◽  
Michael Tsionsky ◽  
Ovadia Lev
Keyword(s):  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Graphite Powder ◽  
Homogeneous Distribution ◽  
Carbon Electrodes ◽  
Carbon Powder ◽  
Electrochemical Characteristics ◽  
Composite Electrodes

ABSTRACTSol-gel derived composite silica-carbon electrodes exhibit favorable electrochemical characteristics. The electrodes benefit from the conductivity and electrochemical advantages of the carbon powder, from the favorable properties of the ceramic network and from the versatility of the sol-gel process. Hydrophobie composite electrodes reject water, only their outermost surface is wetted and they exhibit good signal to background currents. A comparison of several types of carbon powders reveals that higher carbon loading and larger surface area electrodes can be attained by incorporation of dense graphite powder. When high surface area, small size carbon-black powder is used, a homogeneous distribution of microelectrodes, separated by insulating modified silica is formed. This ensemble of microelectrodes increases the sensitivity of the CCEs by more than two orders of magnitude as compared to glassy carbon electrode and graphite CCEs.

scholarly journals Enhanced Desalination Performance of Capacitive Deionization Using Nanoporous Carbon Derived from ZIF-67 Metal Organic Frameworks and CNTs

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2091
Author(s):  
Ngo Minh Phuoc ◽  
Euiyeon Jung ◽  
Nguyen Anh Thu Tran ◽  
Young-Woo Lee ◽  
Chung-Yul Yoo ◽  
...  
Keyword(s):  
Surface Area ◽  
Electrochemical Impedance ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
High Surface Area ◽  
Metal Center ◽  
Carbon Cloth ◽  
Capacitive Deionization ◽  
Metal Organic ◽  
Carbon Based

Capacitive deionization (CDI) based on ion electrosorption has recently emerged as a promising desalination technology due to its low energy consumption and environmental friendliness compared to conventional purification technologies. Carbon-based materials, including activated carbon (AC), carbon aerogel, carbon cloth, and carbon fiber, have been mostly used in CDI electrodes due their high surface area, electrochemical stability, and abundance. However, the low electrical conductivity and non-regular pore shape and size distribution of carbon-based electrodes limits the maximization of the salt removal performance of a CDI desalination system using such electrodes. Metal-organic frameworks (MOFs) are novel porous materials with periodic three-dimensional structures consisting of metal center and organic ligands. MOFs have received substantial attention due to their high surface area, adjustable pore size, periodical unsaturated pores of metal center, and high thermal and chemical stabilities. In this study, we have synthesized ZIF-67 using CNTs as a substrate to fully utilize the unique advantages of both MOF and nanocarbon materials. Such synthesis of ZIF-67 carbon nanostructures was confirmed by TEM, SEM, and XRD. The results showed that the 3D-connected ZIF-67 nanostructures bridging by CNTs were successfully prepared. We applied this nanostructured ZIF-67@CNT to CDI electrodes for desalination. We found that the salt removal performance was significantly enhanced by 88% for 30% ZIF-67@CNTs-included electrodes as compared with pristine AC electrodes. This increase in salt removal behavior was analyzed by electrochemical analysis such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements, and the results indicate reduced electrical impedance and enhanced electrode capacitance in the presence of ZIF-67@CNTs.

Electrochemical Behavior of S-Doped Nanostructured TiO2 Layer Synthesized with PEO Process for Photocatalytic Applications

2013 ◽  
Vol 829 ◽  
pp. 487-491 ◽  
Author(s):  
Mohammad Ahmadzadeh ◽  
Mohammad Ghorbani
Keyword(s):  
Surface Area ◽  
Electrolyte Concentration ◽  
Electrochemical Impedance ◽  
High Surface ◽  
High Surface Area ◽  
Photocatalytic Properties ◽  
Optimum Parameters ◽  
Layer Resistance ◽  
Photocatalytic Applications ◽  
Prepared Layer

Sulfur doped and pure micro-nanoporous TiO2 film were synthesized with PEO method to produce a film with a high surface area for photocatalysis applications. The effect of applied voltage and electrolyte concentration on the microstructure and photocatalytic properties of the prepared layer were investigated via SEM, XRD, EIS and DRS studies. Electrochemical Impedance Spectroscopy (EIS) was carried out in order to determine the corrosion and electrochemical properties of the produced layer. It was found that although the barrier layer resistance decreases with the voltage, the layers porosity and consequently the surface area increases. Finally the XRD and DRS spectrums were correlated with corrosion and photocatalytic properties in order to find out the optimum parameters of the PEO process to synthesize a layer with desired Properties.

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