Papers by Keyword: Ni Electrode

Abstract: The Ni+MoO₂ and Ni+Cr₂O₃ composite coatings were prepared by the electrodeposition under the galvanostatic conditions (j_dep = -200 mA cm^-2) from the nickel bath containing powder of MoO₂ or Cr₂O₃. Studies of hydrogen evolution reaction (HER) in 5 M KOH solution at room temperature were conducted using steady-state polarization and electrochemical impedance spectroscopy (EIS) methods. It was ascertained that the HER rate is higher for the Ni+MoO₂ composite electrode in comparison with the Ni+Cr₂O₃ composite electrode due to the presence of Mo in the nickel matrix.

Abstract: [BaO]m(Ti0.975Zr0.025)O2 ceramics with Ni electrodes were prepared by a firing in N2 atmosphere. The dielectric, ferroelectric and piezoelectric properties were examined in terms of the composition. The remanent polarization of 9.5μC/cm2 was obtained for m=1.01 by the addition of 0.5wt% SiO2. The longitudinal piezoelectric constant d33 calculated from a unipolar signal (8kV/cm,10Hz) was 430pC/N. Lead-free multi-layered piezoelectric actuators were fabricated using this material by the tape casting, screen-printing of Ni electrodes, laminating under heat and pressure, and firing in N2 atmosphere. The displacement of the actuator with 75μm x 9 active piezoelectric layers was 0.17μm at an applied voltage of 75V and a frequency of 10Hz.