Zinc deposition and dissolution in methanesulfonic acid onto a carbon composite electrode as the negative electrode reactions in a hybrid redox flow battery

2011 ◽  
Vol 56 (18) ◽  
pp. 6536-6546 ◽  
Author(s):  
P.K. Leung ◽  
C. Ponce-de-León ◽  
C.T.J. Low ◽  
F.C. Walsh
Keyword(s):  
Composite Electrode ◽  
Methanesulfonic Acid ◽  
Negative Electrode ◽  
Carbon Composite ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Zinc Deposition ◽  
Electrode Reactions ◽  
Carbon Composite Electrode

scholarly journals Square-wave voltammetric determination of rutin in pharmaceutical formulations using a carbon composite electrode modified with copper (II) phosphate immobilized in polyester resin

2012 ◽  
Vol 48 (4) ◽  
pp. 639-649 ◽  
Author(s):  
Kellen Heloizy Garcia Freitas ◽  
Orlando Fatibello-Filho ◽  
Ivanildo Luiz de Mattos
Keyword(s):  
Modified Electrode ◽  
Composite Electrode ◽  
Polyester Resin ◽  
Pharmaceutical Formulations ◽  
Carbon Composite ◽  
X Ray ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Carbon Composite Electrode

A carbon composite electrode modified with copper (II) phosphate immobilized in a polyester resin (Cu3(PO4)2-Poly) for the determination of rutin in pharmaceutical samples by square-wave voltammetry is described herein. The modified electrode allows the determination of rutin at a potential (0.20 V vs. Ag/AgCl (3.0 mol L-1 KCl)) lower than that observed at an unmodified electrode. The peak current was found to be linear to the rutin concentration in the range from 9.9 × 10-8 to 2.5 × 10-6 mol L-1, with a detection limit of 1.2×10-8 mol L-1. The response of the electrode was stable, with no variation in baseline levels within several hours of continuous operation. The surface morphology of the modified electrode was characterized by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) system. The results obtained are precise and accurate. In addition, these results are in agreement with those obtained by the chromatographic method at a 95% confidence level.

Ce(III)/Ce(IV) in methanesulfonic acid as the positive half cell of a redox flow battery

2011 ◽  
Vol 56 (5) ◽  
pp. 2145-2153 ◽  
Author(s):  
P.K. Leung ◽  
C. Ponce de León ◽  
C.T.J. Low ◽  
F.C. Walsh
Keyword(s):  
Methanesulfonic Acid ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Half Cell ◽  
Positive Half

A green strategy for the preparation of a honeycomb-like silicon composite with enhanced lithium storage properties

Nanoscale ◽  
2020 ◽  
Vol 12 (24) ◽  
pp. 12849-12855 ◽  
Author(s):  
Runsheng Gao ◽  
Jie Tang ◽  
Xiaoliang Yu ◽  
Kun Zhang ◽  
Kiyoshi Ozawa ◽  
...  
Keyword(s):  
Composite Electrode ◽  
Carbon Composite ◽  
Lithium Storage ◽  
Silicon Carbon ◽  
Carbon Composite Electrode ◽  
Green Strategy ◽  
Storage Properties

A honeycomb-like silicon–carbon composite electrode was prepared via a green nascent hydrogen method to achieve enhanced lithium storage properties.

scholarly journals Electrochemical Studies on Alizarin Red S as Negolyte for Redox Flow Battery: a Preliminary Study

2018 ◽  
Vol 7 (4.35) ◽  
pp. 375
Author(s):  
C. Khor ◽  
M. R. Mohamed ◽  
C. K. Feng ◽  
P. K. Leung
Keyword(s):  
Diffusion Coefficient ◽  
Negative Electrode ◽  
Operating Conditions ◽  
Alizarin Red S ◽  
Fast Diffusion ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Alizarin Red ◽  
Redox Flow Batteries ◽  
Flow Batteries

Redox flow battery (RFB) has received tremendous attention as energy storage system coupled with renewable energy sources. In this paper, a low-cost alizarin red S (ARS) organic dye is proposed to serve as the active material for the negative electrode reaction for organic redox flow batteries. Cyclic voltammetry has been conducted under a number of operating conditions to reveal the electrochemical performance of this molecule. The results suggest that ARS is highly reversible at low electrode potential (c.a. 0.082 V vs. standard hydrogen electrode), indicating that ARS is a promising negative electrode material for organic redox flow batteries. The diffusion coefficient of ARS is calculated in the range of 6.424 x 10-4 cm2 s-1, This has indicated fast diffusion rate and electrochemical kinetics for oxidation and reduction in higher concentration of ARS. It has been found out that the higher concentration of ARS in base electrolyte cause lowest diffusion coefficient due to solubility issue of ARS.

A comparison of different types of gold?carbon composite electrode for detection of arsenic(III)

2004 ◽  
Vol 381 (4) ◽  
pp. 979-985 ◽  
Author(s):  
Andrew O. Simm ◽  
Craig E. Banks ◽  
Shelley J. Wilkins ◽  
Nikos G. Karousos ◽  
James Davis ◽  
...  
Keyword(s):  
Composite Electrode ◽  
Carbon Composite ◽  
Different Types ◽  
Carbon Composite Electrode

scholarly journals Voltammetric Methods in Metallothionein Research

2005 ◽  
Vol 3 (1-2) ◽  
pp. 43-53 ◽  
Author(s):  
Ivana Šestáková ◽  
Tomáš Navrátil
Keyword(s):  
Metal Ion ◽  
Composite Electrode ◽  
Differential Pulse ◽  
Carbon Composite ◽  
Ion Transfer ◽  
Adsorbed State ◽  
Carbon Composite Electrode ◽  
Pulse Voltammetry ◽  
Voltammetric Methods

The application of voltammetric methods using different rates of polarisation on HMDE reveal inert or labile behaviour of Cd- or Zn- complexes in the presence of excessive cadmium or zinc ions in solution. This phenomenon was demonstrated first on the simplest phytochelatin – complex of peptide(γ-Glu-Cys)2Glywith cadmium, later on rabbit liver metallothioneins –Cd7MTin the presence of cadmium andCd5Zn2MTin the presence of zinc. Voltammetric methods can distinguish between labile and inert complexes present simultaneously and therefore could elucidate their role in reactions of metal ion transfer.Another method using different rates of polarisation – elimination voltammetry with linear scan – proved that S-tetracoordinated complexes of Cd(II) or Zn(II) in the above-mentioned metallothioneins on HMDE are reduced in the adsorbed state. This implies the possibility of increasing the sensitivity of identification or determination of the above complexes. On carbon composite electrode, similar behaviour of Cd-complexes as on HMDE was observed using differential pulse voltammetry.

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