Modeling and optimization of diffusive layers in potentiometric and amperometric electrochemical gas sensors

1Citations
Citations of this article
7Readers
Mendeley users who have this article in their library.

Abstract

A physicochemical model of the behavior of electrochemical gas sensors based in a solid-state ion conducting electrolyte is presented and verified. The model focuses on air-referenced planar sensors with a porous, diffusive layer covering one of the electrodes. By assuming hypotheses of ergodicity, ordinary diffusion, near-equilibrium situation, high catalytic activity and steady-state mass conservation in the system layer/electrode/electrolyte/electrode, the model describes the current-voltage characteristics both in steady-state as in transient conditions. Numerical simulations, including finite element modelling, are used for obtaining the model preditions for I(V), I(t) and V(t) responses in front of binary O2-N2 mixtures and multi-component mixtures. The model is validated with our own-designed sensors with different diffusion layers. © 2012 The Authors. Published by Elsevier Ltd.

Cite

CITATION STYLE

APA

López-Gándara, C., Blanes, M., Fernández-Sanjuán, J. M., M.ramos, F., & Cirera, A. (2012). Modeling and optimization of diffusive layers in potentiometric and amperometric electrochemical gas sensors. In Procedia Engineering (Vol. 47, pp. 1295–1298). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2012.09.392

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free