Open AccessModerate-temperature operable SO<sub>2</sub> gas sensor based on Zr<sup>4+</sup> ion conducting solid electrolyte
Author(s) -
Yasuhisa Uneme,
Shinji Tamura,
Nobuhito Imanaka
Publication year - 2012
Publication title -
journal of sensors and sensor systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.434
H-Index - 18
eISSN - 2194-878X
pISSN - 2194-8771
DOI - 10.5194/jsss-1-29-2012
Subject(s) - electrolyte , nernst equation , electrode , analytical chemistry (journal) , chemistry , metal , auxiliary electrode , ion , sulfur dioxide , fast ion conductor , materials science , inorganic chemistry , chromatography , organic chemistry
A solid electrolyte type sulfur dioxide (SO2) gas sensor that can operate at moderate temperatures was fabricated using Zr4+ ion conducting Zr39/40TaP2.9W0.1O12 solid electrolyte with 0.7La2O2SO4 − 0.3(0.8Li2SO4 + 0.2K2SO4) having a large surface area and Zr metal as the auxiliary sensing electrode and reference electrode, respectively. Since the present sensor showed a quantitative, reproducible and rapid response which obeys the theoretical Nernst relationship even at 400 °C, it is a potential on site SO2 gas sensing tool operable at moderate temperatures around 400 °C