Ruthenium containing perovskites as electrode materials for 4-nitrophenol detection
Abstract
In this paper, the relationship of structure, type of oxygen defects, valence states of Cr and Ru, and electro-
chemical properties of La0.7Sr0.3Cr1-XRuXO3 (0 < x < 0.1) perovskite-type oxides were studied. The samples were
synthesized by a conventional solid-state reaction method and characterized by powder X-ray diffraction, X-ray
fluorescence spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and electron
paramagnetic resonance spectroscopy. The electrochemical performance of these samples was evaluated towards
the detection of 4-nitrophenol and strongly depends on the concentration of ruthenium incorporated in the
crystal lattice. A new La0.7Sr0.3Cr0.925Ru0.075O3 electrocatalyst with a wide linear concentration range (25–5000
mM) and a detection limit of 8 mM was obtained. These results provide an opportunity for its application in the
analysis of real water samples.
Keywords:
Perovskite / Ruthenium / Modified electrode / 4-NitrophenolSource:
Journal of Physics and Chemistry of Solids, 2021, 148, 109649-Publisher:
- Elsevier
Projects:
DOI: 10.1016/j.jpcs.2020.109649
ISSN: 0022-3697