Next Article in Journal
Location Dependence of Mass Sensitivity for Acoustic Wave Devices
Next Article in Special Issue
Metal Decoration Effects on the Gas-Sensing Properties of 2D Hybrid-Structures on Flexible Substrates
Previous Article in Journal
Wireless Power Transfer for Autonomous Wearable Neurotransmitter Sensors
Previous Article in Special Issue
Numerical Modeling and Experimental Validation by Calorimetric Detection of Energetic Materials Using Thermal Bimorph Microcantilever Array: A Case Study on Sensing Vapors of Volatile Organic Compounds (VOCs)
Article Menu

Export Article

Open AccessArticle

Effect of Electrode Configuration on Nitric Oxide Gas Sensor Behavior

and *,†
Institute for Micromanufacturing, Louisiana Tech University, Ruston, LA 71272, USA
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: W. Rudolf Seitz
Sensors 2015, 15(9), 24573-24584;
Received: 30 June 2015 / Accepted: 16 September 2015 / Published: 23 September 2015
(This article belongs to the Special Issue Gas Sensors—Designs and Applications)
PDF [705 KB, uploaded 23 September 2015]


The influence of electrode configuration on the impedancemetric response of nitric oxide (NO) gas sensors was investigated for solid electrochemical cells [Au/yttria-stabilized zirconia (YSZ)/Au)]. Fabrication of the sensors was carried out at 1050 °C in order to establish a porous YSZ electrolyte that enabled gas diffusion. Two electrode configurations were studied where Au wire electrodes were either embedded within or wrapped around the YSZ electrolyte. The electrical response of the sensors was collected via impedance spectroscopy under various operating conditions where gas concentrations ranged from 0 to 100 ppm NO and 1%–18% O2 at temperatures varying from 600 to 700 °C. Gas diffusion appeared to be a rate-limiting mechanism in sensors where the electrode configuration resulted in longer diffusion pathways. The temperature dependence of the NO sensors studied was independent of the electrode configuration. Analysis of the impedance data, along with equivalent circuit modeling indicated the electrode configuration of the sensor effected gas and ionic transport pathways, capacitance behavior, and NO sensitivity. View Full-Text
Keywords: NOx sensors; diesel emissions; electrode configuration; porous YSZ electrolytes; impedance spectroscopy NOx sensors; diesel emissions; electrode configuration; porous YSZ electrolytes; impedance spectroscopy

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Cui, L.; Murray, E.P. Effect of Electrode Configuration on Nitric Oxide Gas Sensor Behavior. Sensors 2015, 15, 24573-24584.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top