Title :
Conductometric Sensing of H2 by Chromium Niobate
Author :
Murthy, A. Sree Rama ; Gnanasekar, K.I. ; Jayaraman, V. ; Umarji, A.M. ; Gnanasekaran, T.
Author_Institution :
Chem. Group, Indira Gandhi Centre for Atomic Res., Kalpakkam, India
Abstract :
Investigations on chromium niobate (CrNbO4) have shown that the material responds to a wide hydrogen concentration range of 0.01%-0.40% at 613 K. The conductivity of CrNbO4 is independent of oxygen partial pressure and offers to be a promising candidate for monitoring H2 in radioactive spent fuel storage facilities. Reduction of metal ions to lower valence states during hydrogen sensing was evidenced by X-ray photoelectron spectroscopic studies.
Keywords :
X-ray photoelectron spectra; chromium compounds; gas sensors; hydrogen; CrNbO4; H2; H2 monitoring; X-ray photoelectron spectroscopy; conductivity; conductometric sensing; metal ion reduction; oxygen partial pressure; radioactive spent fuel storage facilities; temperature 613 K; valence states; wide hydrogen concentration range; Argon; Chromium; Conductivity; Hydrogen; Resistance; Temperature sensors; Chromium niobate; X-ray photoelectron spectroscopy; hydrogen sensing;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2015.2470102
