Electrical characterization of semiconducting La2CuO4 for potentiometric gas sensor applications

Briggs White; Martin Van Assche; Enrico Traversa; Eric Wachsman

doi:10.1149/1.2215547

Electrical characterization of semiconducting La₂CuO₄ for potentiometric gas sensor applications

Briggs White^*, Martin Van Assche, Enrico Traversa, Eric Wachsman

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

8 Scopus citations

Abstract

Potentiometric sensors of the configuration La₂CuO ₄|YSZ|Pt are sensitive to ppm-levels of NO, NO₂ and CO gas while they are insensitive to %-level variations in oxygen concentration. The voltage response is determined by the Differential Electrode Equilibria. The equilibria attained at each electrode is a function of the catalytic and electrocatalytic activity as well as the often overlooked semiconductor character of the electrode. In fact, many metal oxides used as potentiometric sensor electrodes are semiconductors. The Fermi level of a semiconductor is very sensitive to gas adsorption and changes proportionally as the gas concentration does. The Fermi level can be directly related to the electrode potential. Therefore, adsorption-induced Fermi level changes make a contribution to the potentiometric response when semiconductors are used as electrode materials. We have fabricated, characterized, and compared potentiometric and conductometric sensors with La₂CuO₄ sensing electrodes to illustrate this effect. copyright The Electrochemical Society.

Original language	English (US)
Title of host publication	Solid State Ionic Devices IV
Publisher	Electrochemical Society Inc.
Pages	109-119
Number of pages	11
Edition	7
ISBN (Print)	1566774942, 9781566774949
DOIs	https://doi.org/10.1149/1.2215547
State	Published - 2006
Externally published	Yes
Event	4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society - Los Angeles, CA, United States Duration: Oct 16 2005 → Oct 21 2005

Publication series

Name	ECS Transactions
Number	7
Volume	1
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society
Country/Territory	United States
City	Los Angeles, CA
Period	10/16/05 → 10/21/05

ASJC Scopus subject areas

General Engineering

Access to Document

10.1149/1.2215547

Cite this

@inproceedings{9b35c2569335467baa7d522b2f96b641,

title = "Electrical characterization of semiconducting La2CuO4 for potentiometric gas sensor applications",

abstract = "Potentiometric sensors of the configuration La2CuO 4|YSZ|Pt are sensitive to ppm-levels of NO, NO2 and CO gas while they are insensitive to %-level variations in oxygen concentration. The voltage response is determined by the Differential Electrode Equilibria. The equilibria attained at each electrode is a function of the catalytic and electrocatalytic activity as well as the often overlooked semiconductor character of the electrode. In fact, many metal oxides used as potentiometric sensor electrodes are semiconductors. The Fermi level of a semiconductor is very sensitive to gas adsorption and changes proportionally as the gas concentration does. The Fermi level can be directly related to the electrode potential. Therefore, adsorption-induced Fermi level changes make a contribution to the potentiometric response when semiconductors are used as electrode materials. We have fabricated, characterized, and compared potentiometric and conductometric sensors with La2CuO4 sensing electrodes to illustrate this effect. copyright The Electrochemical Society.",

author = "Briggs White and {Van Assche}, Martin and Enrico Traversa and Eric Wachsman",

year = "2006",

doi = "10.1149/1.2215547",

language = "English (US)",

isbn = "1566774942",

series = "ECS Transactions",

publisher = "Electrochemical Society Inc.",

number = "7",

pages = "109--119",

booktitle = "Solid State Ionic Devices IV",

edition = "7",

note = "4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society ; Conference date: 16-10-2005 Through 21-10-2005",

}

White, B, Van Assche, M, Traversa, E & Wachsman, E 2006, Electrical characterization of semiconducting La₂CuO₄ for potentiometric gas sensor applications. in Solid State Ionic Devices IV. 7 edn, ECS Transactions, no. 7, vol. 1, Electrochemical Society Inc., pp. 109-119, 4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society, Los Angeles, CA, United States, 10/16/05. https://doi.org/10.1149/1.2215547

Electrical characterization of semiconducting La₂CuO₄ for potentiometric gas sensor applications. / White, Briggs; Van Assche, Martin; Traversa, Enrico et al.
Solid State Ionic Devices IV. 7. ed. Electrochemical Society Inc., 2006. p. 109-119 (ECS Transactions; Vol. 1, No. 7).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - Potentiometric sensors of the configuration La2CuO 4|YSZ|Pt are sensitive to ppm-levels of NO, NO2 and CO gas while they are insensitive to %-level variations in oxygen concentration. The voltage response is determined by the Differential Electrode Equilibria. The equilibria attained at each electrode is a function of the catalytic and electrocatalytic activity as well as the often overlooked semiconductor character of the electrode. In fact, many metal oxides used as potentiometric sensor electrodes are semiconductors. The Fermi level of a semiconductor is very sensitive to gas adsorption and changes proportionally as the gas concentration does. The Fermi level can be directly related to the electrode potential. Therefore, adsorption-induced Fermi level changes make a contribution to the potentiometric response when semiconductors are used as electrode materials. We have fabricated, characterized, and compared potentiometric and conductometric sensors with La2CuO4 sensing electrodes to illustrate this effect. copyright The Electrochemical Society.

AB - Potentiometric sensors of the configuration La2CuO 4|YSZ|Pt are sensitive to ppm-levels of NO, NO2 and CO gas while they are insensitive to %-level variations in oxygen concentration. The voltage response is determined by the Differential Electrode Equilibria. The equilibria attained at each electrode is a function of the catalytic and electrocatalytic activity as well as the often overlooked semiconductor character of the electrode. In fact, many metal oxides used as potentiometric sensor electrodes are semiconductors. The Fermi level of a semiconductor is very sensitive to gas adsorption and changes proportionally as the gas concentration does. The Fermi level can be directly related to the electrode potential. Therefore, adsorption-induced Fermi level changes make a contribution to the potentiometric response when semiconductors are used as electrode materials. We have fabricated, characterized, and compared potentiometric and conductometric sensors with La2CuO4 sensing electrodes to illustrate this effect. copyright The Electrochemical Society.

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