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Title: Additively manufactured mixed potential electrochemical sensors for NO x, C 3H 8, and NH 3 detection

Abstract

Additive manufacturing of mixed potential electrochemical sensors opens the possibility to perform rapid prototyping of electrode and electrolyte materials. We report for the first time the use of this technique for the fabrication of solid-state electrochemical gas sensors of the mixed potential type and assessment of variability in the manufacturing process. La 0.87Sr 0.13CrO 3 (LSCO) and Pt electrodes bridged with a porous yttria-stabilized zirconia (YSZ) have been deposited on YSZ substrates by direct-write extrusion of pastes and inks. The sensors are evaluated for their sensitivity to 200 ppm of NO x, C 3H 8, and NH 3. There is a need to understand how variations in intrinsic materials parameters during manufacturing such as differences in porosity affect the gas sensing of additively manufactured sensors to guide optimization of their performance and serve as quality control techniques. Further characterizations of these devices include electrochemical impedance spectroscopy and an aqueous electrochemical assessment of the electrode surface area and diffusion through the porous layer. In conclusion, we find a correlation of increased sensitivity with larger gas reaction impedance, higher Pt electrode surface area, and slower diffusion.

Authors:
ORCiD logo [1];  [1];  [2];  [3]
  1. Univ. of New Mexico, Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1459925
Report Number(s):
SAND-2018-7018J
Journal ID: ISSN 2363-9512; 665274
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Progress in Additive Manufacturing
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2363-9512
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Tsui, Lok-kun, Benavidez, Angelica, Evans, Lindsey, and Garzon, Fernando H. Additively manufactured mixed potential electrochemical sensors for NOx, C3H8, and NH3 detection. United States: N. p., 2018. Web. doi:10.1007/s40964-018-0054-2.
Tsui, Lok-kun, Benavidez, Angelica, Evans, Lindsey, & Garzon, Fernando H. Additively manufactured mixed potential electrochemical sensors for NOx, C3H8, and NH3 detection. United States. doi:10.1007/s40964-018-0054-2.
Tsui, Lok-kun, Benavidez, Angelica, Evans, Lindsey, and Garzon, Fernando H. Fri . "Additively manufactured mixed potential electrochemical sensors for NOx, C3H8, and NH3 detection". United States. doi:10.1007/s40964-018-0054-2. https://www.osti.gov/servlets/purl/1459925.
@article{osti_1459925,
title = {Additively manufactured mixed potential electrochemical sensors for NOx, C3H8, and NH3 detection},
author = {Tsui, Lok-kun and Benavidez, Angelica and Evans, Lindsey and Garzon, Fernando H.},
abstractNote = {Additive manufacturing of mixed potential electrochemical sensors opens the possibility to perform rapid prototyping of electrode and electrolyte materials. We report for the first time the use of this technique for the fabrication of solid-state electrochemical gas sensors of the mixed potential type and assessment of variability in the manufacturing process. La0.87Sr0.13CrO3 (LSCO) and Pt electrodes bridged with a porous yttria-stabilized zirconia (YSZ) have been deposited on YSZ substrates by direct-write extrusion of pastes and inks. The sensors are evaluated for their sensitivity to 200 ppm of NOx, C3H8, and NH3. There is a need to understand how variations in intrinsic materials parameters during manufacturing such as differences in porosity affect the gas sensing of additively manufactured sensors to guide optimization of their performance and serve as quality control techniques. Further characterizations of these devices include electrochemical impedance spectroscopy and an aqueous electrochemical assessment of the electrode surface area and diffusion through the porous layer. In conclusion, we find a correlation of increased sensitivity with larger gas reaction impedance, higher Pt electrode surface area, and slower diffusion.},
doi = {10.1007/s40964-018-0054-2},
journal = {Progress in Additive Manufacturing},
number = 1,
volume = 4,
place = {United States},
year = {2018},
month = {6}
}

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