Chapter 6 The Use of Channel Electrodes in the Investigation of Interfacial Reaction Mechanisms

Unwin, Patrick R.; Compton, Richard G.

doi:10.1016/s0069-8040(08)70321-2

Cited by 66 publications

(21 citation statements)

References 179 publications

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“…Fourth, the possibility of irradiating the electrode surface through the solution permits photoelectrochemical studies to be readily undertaken in the channel electrode geometry [2,[38][39][40][41][42][43][44][45][46]. Fifth, the possibility of double electrode experiments is readily implemented [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] Last, this latter type of experiment may be generalized so that an electrochemical detector is located downstream of an insulating solid, so as to study reactions of nonconducting solid/liquid interfaces [62][63][64][65][66].…”

Section: Introductionmentioning

confidence: 99%

Channel Electrodes — A Review

1998

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Section: Introductionmentioning

confidence: 99%

Channel Electrodes — A Review

1998

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“…The main geometric parameters which were varied were the length of the enzyme layer, the gap between the enzyme layer and the detector electrode and the height of the channel. This latter variable has been shown to have a considerable influence on mechanistic studies using the channel flow cell [27].…”

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confidence: 99%

Which Parameters Affect the Response of the Channel Biosensor?

et al. 2003

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The important parameters in defining the response of the portable channel biosensor described previously are explored by connecting the portable flow cell to a gravity feed flow system and using a highly defined enzyme immobilization protocol which ensures the enzyme reaction is a surface reaction. The enzyme glucose oxidase (GOD) was immobilized by covalent attachment to a self-assembled monolayer modified gold surface. As a glucose solution flowed down the rectangular duct defined by the flow cell, it passed over the enzyme layer where the enzyme reaction produced hydrogen peroxide. The hydrogen peroxide was swept further downstream to the detector electrode. The response of such an enzyme electrode was shown to be limited by mass transport of the cosubstrate oxygen to the enzyme layer. Increasing the amount of oxygen in the sample meant the response of the biosensor became limited by the enzyme kinetics. The influence of parameters such as flow rate, height of the channel, enzyme layer length and the gap between the enzyme layer and the detector electrode were explored.

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“…Detailed derivation of this model and its approximate analytical solution due to Levich are found elsewhere. 37,38 The following dimensionless equations are solved for the stationary state of a simple one-electron transfer mechanism: r 2 CðX; YÞ À VðYÞ @CðX; YÞ @X ¼ 0 VðYÞ ¼ 6PeYð1 À YÞ ð8Þ…”

Section: ¹12mentioning

confidence: 99%

Probing the Numerical Convergence of a Commercial Finite Element Software in Electrochemical Simulations

et al. 2014

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We studied the efficiency and accuracy of a general purpose finite element software in the numerical solution of electrochemical models. Typical numerical complications like boundary singularities, stiffness and multiscale problems were addressed. The convergence order was determined for various mesh refinement strategies. As a general rule, the numerical efficiency of the software proved adequate to the problems dealt, but the default generated meshes and the adaptive mesh adjustment do not work properly, if high levels of accuracy are required. Therefore, a manual adjustment of the mesh control parameters is indispensable. A thorough discussion of the problem of adjusting the mesh was presented to serve as a general introduction to the subject for beginners in the field. Additionally, it was suggested a general approach for mesh optimization through which the convergence rate can be considerably increased.

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Chapter 6 The Use of Channel Electrodes in the Investigation of Interfacial Reaction Mechanisms

Cited by 66 publications

References 179 publications

Channel Electrodes — A Review

Channel Electrodes — A Review

Which Parameters Affect the Response of the Channel Biosensor?

Probing the Numerical Convergence of a Commercial Finite Element Software in Electrochemical Simulations

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