EC3.3 - Sensitivity enhancement of mixed-potential gas sensor by a series-connected sensor array

Event
17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
Chapter
Electrochemical Sensors 3
Author(s)
T. Akamatsu, T. Itoh, W. Shin - Electroceramics Group, Inorganic Functional Materials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya (Japan)
Pages
254 - 255
DOI
10.5162/IMCS2018/EC3.3
ISBN
978-3-9816876-9-9
Price
free

Abstract

Mixed-potential gas sensors with an anhydrous proton conductor consisting of zinc metaphosphate glass powder and benzimidazole were fabricated. Reference and sensing electrodes of gold and platinum, respectively, were prepared on an alumina substrate, and a proton conductor was deposited between these electrodes to prepare a gas sensor. The sensor responses to 1-25 ppm H2 gas in air were investigated. Sensor array with 7 sensors connected in series showed a response to the H2 gas, even at 1 ppm. The sensitivities of the single sensor and sensor array were −21 and −130 mV/decade, respectively. By connecting 7 sensors in series, the sensor response and sensitivity were improved.

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