Dynamometer Testing of Planar Mixed-Potential Sensors

Journal Article · Mon Sep 22 00:00:00 EDT 2014 · ECS Transactions (Online)

DOI:https://doi.org/10.1149/06119.0055ecst· OSTI ID:1423973

Kreller, C. R. ^[1]; Sekhar, P. K. ^[2]; Prikhodko, V. ^[3]; Pihl, J. ^[3]; Curran, S. ^[3]; Parks, J. E. ^[3]; Mukundan, R. ^[1]; Garzon, F. ^[1]; Brosha, E. L. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. Washington State Univ., Vancouver, WA (United States)
3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Mixed-potential sensors for vehicle on-board emissions monitoring applications have been fabricated in an automotive planar sensor configuration using high temperature ceramic co-fire methods. The sensing element consists of dense Pt and LaSrCrO electrodes and a porous 3 mol% YSZ electrolyte. This sensor construct exhibits preferential selectivity to NO_x (NO+NO₂) when operated at a positive current bias. The performance of the planar sensors under engine-out conditions was recently evaluated at the Oak Ridge National Laboratory National Transportation Research Center on a GM 1.9L CIDI diesel engine. The sensor response qualitatively tracked transients in NO_x measured via FTIR under transient engine operation. Additionally, quantitative correlation between sensor voltage response and total NO_x concentration was obtained under steady-state engine speed and load while varying exhaust gas recirculation (EGR) levels.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1423973
• Alternate ID(s): OSTI ID: 1286727
• Report Number(s): LA--UR-14-24279
• Journal Information: ECS Transactions (Online), Journal Name: ECS Transactions (Online) Journal Issue: 19 Vol. 61; ISSN 1938-6737
• Publisher: Electrochemical Society
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
Material Science