pp. 777-784
S&M1237 Research Paper https://doi.org/10.18494/SAM.2016.1256 Published: July 27, 2016 Amperometric Nitrite-Ion Sensor Based on Electrodeposited Sm-Based Perovskite-Type Oxide Thick-Film Electrode [PDF] Takahiro Yatsunami, Satoko Takase, and Youichi Shimizu (Received September 30, 2015; Accepted March 7, 2016) Keywords: perovskite-type oxide, nitrite-ion sensor, carbon-felt electrodes, amperometric, electrophoretic deposition
Perovskite-type oxide SmBO3 (B = Cr, Mn, Fe, Co) powders were prepared by a polymer precursor method at 750 ℃ and systematically investigated for electrochemical sensing properties for NO2 −. The SmBO3-modified carbon-felt electrodes could be prepared by an electrophoretic deposition (EPD) method without sintering. Among the oxide deposited electrodes, the SmFeO3 modified electrode showed the highest sensitivity to NO2 − with 11.9 mA M−1 cm−2 and a linear sensing range between 5.0 × 10−5 and 1.0 × 10−3 M at +0.85 V vs Ag / AgCl with high selectivity for NO2 − and no response to most other anions. A good correlation was observed between electrochemical activity toward nitrite-ion oxidation and oxygen adsorption properties of the oxides.
Corresponding author: Youichi ShimizuCite this article Takahiro Yatsunami, Satoko Takase, and Youichi Shimizu, Amperometric Nitrite-Ion Sensor Based on Electrodeposited Sm-Based Perovskite-Type Oxide Thick-Film Electrode, Sens. Mater., Vol. 28, No. 7, 2016, p. 777-784. |