TY - JOUR
T1 - Operating modes of electrochemical H-concentration probes for tritium sensors
AU - Juhera, E.
AU - Colominas, S.
AU - Abellà, J.
N1 - Conference code: 28
PY - 2015/10/1
Y1 - 2015/10/1
N2 - Potentiometric hydrogen sensors using different solid-state electrolytes have been designed and tested at the Electrochemical Methods Lab at Institut Quimic de Sarria (IQS). The most promising element (Sr(Ce0.9-Zr0.1)0.95Yb0.05O3-α) has been selected for this work in order to evaluate the sensor performance at different hydrogen concentrations in two different operating modes: amperometric and potentiometric. In addition, the sensor response has been evaluated at different working temperatures (500, 575 and 650 °C). The experiments performed proved that when the sensor was used in a potentiometric mode, there is a threshold hydrogen concentration that the sensor can detect depending on the working conditions; 15 mbar at 575 °C and 10 mbar 650 °C. At 500 °C the minimum working temperature of this ceramic has not been achieved, so large deviations between experimental data and theoretical calculations has been obtained. When the sensor was used in an amperometric mode the obtained currents increased as a function of the applied voltage. At a fixed potential, the higher the temperature the higher the current was. So the sensor sensitivity can be tuned by changing the applied voltage at a fixed temperature and hydrogen concentration.
AB - Potentiometric hydrogen sensors using different solid-state electrolytes have been designed and tested at the Electrochemical Methods Lab at Institut Quimic de Sarria (IQS). The most promising element (Sr(Ce0.9-Zr0.1)0.95Yb0.05O3-α) has been selected for this work in order to evaluate the sensor performance at different hydrogen concentrations in two different operating modes: amperometric and potentiometric. In addition, the sensor response has been evaluated at different working temperatures (500, 575 and 650 °C). The experiments performed proved that when the sensor was used in a potentiometric mode, there is a threshold hydrogen concentration that the sensor can detect depending on the working conditions; 15 mbar at 575 °C and 10 mbar 650 °C. At 500 °C the minimum working temperature of this ceramic has not been achieved, so large deviations between experimental data and theoretical calculations has been obtained. When the sensor was used in an amperometric mode the obtained currents increased as a function of the applied voltage. At a fixed potential, the higher the temperature the higher the current was. So the sensor sensitivity can be tuned by changing the applied voltage at a fixed temperature and hydrogen concentration.
KW - Hydrogen
KW - Liquid blanket
KW - Proton conducting ceramics
KW - Sensor
KW - Tritium
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UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pure_univeritat_ramon_llull&SrcAuth=WosAPI&KeyUT=WOS:000363344900146&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.1016/j.fusengdes.2015.03.005
DO - 10.1016/j.fusengdes.2015.03.005
M3 - Article
AN - SCOPUS:84943584935
SN - 0920-3796
VL - 98-99
SP - 1710
EP - 1714
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
T2 - 28th Symposium on Fusion Technology (SOFT 2014)
Y2 - 29 September 2014 through 3 October 2014
ER -