Gold Nanoelectrode Arrays and their Evaluation by Impedance Spectroscopy and Cyclic Voltammetry

ChemPhysChem ◽  
2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
David Lantiat ◽  
Vincent Vivier ◽  
Christel Laberty-Robert ◽  
David Grosso ◽  
Clément Sanchez
Keyword(s):  
Cyclic Voltammetry ◽  
Impedance Spectroscopy ◽  
Nanoelectrode Arrays ◽  
Gold Nanoelectrode

scholarly journals Phenol Removal from Wastewaters by Electrochemical Biosensor

2019 ◽  
pp. 24-32
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Biosensor ◽  
Electrochemical Impedance ◽  
Experimental Results ◽  
Phenol Oxidation ◽  
Phenol Removal ◽  
Natural Phosphate ◽  
The Matrix

The aim of this work is to introduce bacteria into the matrix of natural phosphate to catalyze the phenol oxidation in the wastewater.This electrode, designated subsequently by bacteria-NP-CPE, Showed stable response and was characterized with voltammeter methods, as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and DRX. The experimental results revealed that the prepared electrode could be a feasible for degradation of hazardous phenol pollutants in the wastewater.

scholarly journals Electrochemical analysis of water and suds by impedance spectroscopy and cyclic voltammetry

2014 ◽  
Vol 3 (2) ◽  
pp. 133-140 ◽  
Author(s):  
R. Gruden ◽  
A. Buchholz ◽  
O. Kanoun
Keyword(s):  
Water Quality ◽  
Cyclic Voltammetry ◽  
Impedance Spectroscopy ◽  
Electrochemical Analysis ◽  
Total Hardness ◽  
Impedance Measurements ◽  
Washing Process ◽  
Calcium Magnesium ◽  
The Ideal

Abstract. Optimum detergent dosage during a washing process depends on water quality, degree of pollution and quantity of laundry. Particularly, water quality is an important factor. Other parameters like carbonate- or non-carbonate hardness and calcium / magnesium (Ca / Mg) ratio in addition to total hardness of water have an impact on the amount of detergent. This work discusses the possibilities realizing a detergent sensor that measures important parameters for the washing process and assess the ideal necessary amount of detergent during the washing process. The approach is to combine impedance spectroscopy with cyclic voltammetry in order to determine both water quality and concentration of detergent in the suds which build up the basis for an optimum detergent dosage. The results of cyclic voltammetry show that it is possible to identify the Ca / Mg ratio and the carbonate hardness separately, which is necessary for the optimization of the washing process. Impedance measurements identify total hardness and detergent concentrations.

Effect of MEAs Preparation Procedure on Their Performance in Room Temperature DMFC

2010 ◽  
Author(s):  
Evgeniy N. Gribov ◽  
Ivan M. Krivobokov ◽  
Aleksey G. Okunev
Keyword(s):  
Cyclic Voltammetry ◽  
Impedance Spectroscopy ◽  
Power Density ◽  
Room Temperature ◽  
Carbon Paper ◽  
Higher Power ◽  
Ptru Catalysts ◽  
Coated Carbon ◽  
Preparation Techniques ◽  
Coated Membrane

In this work the effect of the MEA preparation techniques on the performance of DMFC was evaluated using three different methods of electrocatalyst deposition: i) catalyst coated membrane; ii) catalyst coated carbon paper; and iii) decal deposition. Optimization of the nafion content (5–15 wt. %) at anode and cathode sides of the MEA and the pressure (150–500 atm) were also performed. Activities of both supported and unsupported Pt and PtRu catalysts (Johnson Matthew) were compared in room temperature DMFC (RT-DMFC) using polarization curves. All MEAs prepared were also characterized by electrochemical (cyclic voltammetry, impedance spectroscopy) methods. It was shown that optimal nafion content is 5–10 wt. % at both anode and cathode sides, while the optimal pressure is in the 300–500 atm. range. The unsupported catalysts showed slightly higher power density at RT-DMFC (∼ 14 mW/cm2) as compared to the supported ones (∼10 mW/cm2) at the same Pt load. Variation of the wetness of MEAs upon mounting in DMFC allowed us to increase of the power density of RT-DMFC up to 32 mW/cm2.

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