Issue 29, 2024

Selective detection of NO using the perovskite-type oxide LaMO3 (M = Cr, Mn, Fe, Co, and Ni) as the electrode material for yttrium-stabilized zirconia-based electrochemical sensors

Abstract

Yttrium-stabilized zirconia-based electrochemical gas sensors have good application prospects in NO high-temperature detection systems due to their stability under extreme conditions. In this study, an LaMO3 (M: Cr, Mn, Fe, Co, and Ni) perovskite was prepared using the sol–gel method as the electrode material for an yttrium-stabilized zirconia-based electrochemical sensor for the selective detection of NO. The influence of M-site metals on the electrode performance was revealed through various experimental characterization studies and first-principles calculations. The results indicate that the response values of the different M-site metal perovskites can be arranged in the following order: LaCrO3 > LaMnO3 > LaFeO3 > LaNiO3 > LaCoO3. Among them, LaCrO3 exhibits a response value of −64.11 mV to 100 ppm NO, with high sensitivity (−41.19 mV per decade) and high selectivity. Further research has demonstrated that the number of oxygen vacancies and response values in these perovskite materials follow the same order. Electrochemical impedance spectroscopy indicated that LaCrO3 exhibited the lowest polarization resistance, and that these changes promoted the adsorption and reaction of NO on the electrode. Finally, the mechanism of NO adsorption on the LaCrO3 surface was revealed using density functional theory calculations. This study not only provides a new approach for selecting high-performance electrode materials but also reveals the fundamental impact of M-site metals on the performance of perovskites.

Graphical abstract: Selective detection of NO using the perovskite-type oxide LaMO3 (M = Cr, Mn, Fe, Co, and Ni) as the electrode material for yttrium-stabilized zirconia-based electrochemical sensors

Article information

Article type
Paper
Submitted
14 شوال 1445
Accepted
11 ذو الحجة 1445
First published
25 ذو الحجة 1445

J. Mater. Chem. A, 2024,12, 18234-18247

Selective detection of NO using the perovskite-type oxide LaMO3 (M = Cr, Mn, Fe, Co, and Ni) as the electrode material for yttrium-stabilized zirconia-based electrochemical sensors

H. Sun, J. Song, P. Shi, Z. Cheng, L. Tian, M. Zhou and T. Qi, J. Mater. Chem. A, 2024, 12, 18234 DOI: 10.1039/D4TA02809K

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