Papers by Keyword: Iridium Oxide

Abstract: In this study, Ce_0.8Sr_0.2Fe_0.9Ir_0.1O_3-δ (CSFI) perovskite type material was prepared by sol-gel technique, characterised, and then tested as a cathode material for solid oxide fuel cells operating between 300 – 500 °C. The materials were studied using X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The morphology was examined using scanning electron microscopy and high resolution transmission electron microscopy. Samples showed changes in the overall structure and defect chemistry with an increase in calcination temperature. When tested as cathode materials, the material calcined at 1000 °C had the greatest performance at a test temperature of 500 °C, with a current density of 774.47 mA/cm², a power density of 483.07 mW/cm² and an area specific resistance (ASR) of 0.342 Ω/cm².

Abstract: A IrO₂ anode on titanium substrate with iridium–titanium oxide interlayer (Ti/ TiO₂-IrO_x/IrO₂) was prepared through repeating brushing-drying-calcinating procedure. The TiO₂-IrO_x interlayer was prepared using a mixture of TiN nanoparticles and H₂IrCl₆ solution as the coating solution. The Ti/TiO₂-IrO_x/IrO₂ had high catalytic activity, good catalytic stability and long service life. It was suitable for the application of electrochemical depolymerization of chitosans. The experimental results showed that chitosan could be effectively degraded using the Ti/ TiO₂-IrO_x/IrO₂ as the anode. The influence of the current density on the degradation of chitosans was complicated. The power supply type obviously influenced on the degradation.

Abstract: Surface modification has become a common method to improve the interface property of electrodes. The existing problems on the interface of implanted electrodes are introduced in biocompatibility, corrosion resistance, electrochemical properties in this article. Iridium oxide is the most widely used material for implanted bio-electrodes because of its good biocompatibility, corrosion resistance, high safety injection charge density and low impedance. And preparation methods of the iridium oxide modifying bio-electrodes are described and discussed for enhancing the long-term implanting stability of the bio-electrodes.

Abstract: Implantable neural prostheses form hybrid interfaces with biological constructs, and the application of electrical fields can restore functions of patients with neurological damages. The various stoichiometric compositions of iridium oxide were synthesized using reactive magnetron sputtering. The charge injection behavior of iridium oxide deposited with an O2/Ar ratio of 0.5 was similar to pure Ir. The charge density of iridium oxide increased with increasing O2/Ar ratio, and increasing thickness of iridium oxide.