Electrochemical Synthesis of CeB6 Nanotubes

Abstract

This work presents the results of joint electroreduction of tetrafluorborate and cerium-ions, and determines the conditions of electrochemical synthesis of cerium borides in KCl-NaCl melts at the 973 K on tungsten electrode by the linear and cyclic voltammetry. Based on the current-voltage studies the optimal modes of cerium boride electrodeposition were found.

Mechanochemical Synthesis of High Crystalline Cerium Hexaboride Nanoparticles from CeO2‐B2O3‐Mg Ternary System

“…By comparing these Figures (Figures 3-A and B), it can be concluded that semi-spherical MgO NPs were removed via leaching. On the other hand, in accordance to XRD result ( Figure 2) and TEM image (Figure 3-B), the phase component of the semi-cubic particles is CeB 6 . It can be seen that these NPs have curved corners.…”

“…In addition, the allocated score of profile fitting via the search/match software (PANalytical X'Pert HighScore) was 95%. Therefore, according to (i) tiny difference between the standard and calculated lattice parameter values, (ii) the high degree of crystallinity and (iii) high score of profile fitting, it can be concluded that this method can be a very effective technique to synthesize high-crystalline and high-quality CeB 6 NPs. Figure 3 shows TEM micrographs of the as-synthesized NPs before and after leaching process.…”

“…CeB 6 is an engineering ceramic with excellent electronic and magnetic characteristics, such as high thermal stability, low volatility, low work function (2.5 eV), high stability in vacuum and high melting point (> 2000°C). It owns one of the highest electron emissivity which has been found to use in high-tech equipment such as cathodes for electron microscopy, high current applications in microwave tubes, electron-beam welders, X-ray sources and etc.…”

“…It owns one of the highest electron emissivity which has been found to use in high-tech equipment such as cathodes for electron microscopy, high current applications in microwave tubes, electron-beam welders, X-ray sources and etc. 1 Various techniques have been reported to prepare CeB 6 . The two conventional methods for synthesizing CeB 6 are (i) direct reaction of B and Ce at an elevated temperature and (ii) carbothermal reduction of CeO 2 -B 2 O 3 mixture.…”

“…5 Kushkhov et al used electroreduction of Ce ions with fluoroborate ions to prepare CeB 6 nanotube. 6 The high cost of the equipment needed, is the main disadvantage of these techniques which limits its applicability. 7 In this regard, Dou et al prepared CeB 6 nanopowder by high-temperature self-propagating synthesis (SHS) method.…”