A Novel Three-Electrode Solid Electrolyte Hydrogen Gas Sensor - Intelligent Computing for Sustainable Energy and Environment - page 44

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0 2 4 6 8 10 12

n (%)

Fig. 5. The electromotive force of Ni-W electrodes E 2 of the three-electrode solid
electrolyte as a function of the hydrogen concentration

5 Conclusions

A novel three-electrode solid electrolyte hydrogen sensor was investigated in this
study. By introducing an adjusting electrode, the design of the three-electrode
solid electrolyte hydrogen sensor was describedinthispaper.Theexperiments
were conducted in a sealed container and the performance of the two-electrode
solid electrolyte hydrogen sensor and the three-electrode solid electrolyte hy-
drogen sensor were explored. For the two-electrode sensor, the maximal detect-
ing concentration is limited to 1% and the dynamic range of output voltage
can achieve about 0.25V. For the three-electrode sensor, the maximal detecting
concentration can reach about 12% and the dynamic range of output voltage
is about 0.65V for Pt-W electrode pair. The experimental results show that
the three-electrode solid electrolyte sensor can effectively improve the measure-
ment range of the hydrogen concentration, and has a better sensitivity. The
design of the new three-electrode solid electrolyte sensor can also present the
feasibility for the research on the multi-electrode solid electrolyte sensor and
provide the foundation for improving the sensor performance by data fusion
method.

Acknowledgements. We are grateful for the support from the National Sci-
ence Foundation of China (grant No. 61201017), the Fundamental Research
Funds for the Central Universities (grant No. HIT.NSRIF.2013010, grant NO.
HIT.NSRIF.201146).