Fabrication and electrical properties of nanocrystalline Dy3+-doped CeO2 for intermediate-temperature solid oxide fuel cells

Low temperature fabrication of dense gadolinia-doped ceria electrolyte with enhanced electrical conductivity

“…Therefore, it is unconceivable to consider an absolute change of electrical conductivity with the variation of grain size. Under the prerequisite of similar densities, Park et al [48] reported lower electrical conductivity caused by high-temperature sintering for Dy 3+ -doped ceria electrolytes and they explained this oversintering effect by well-developed space charge layer region. Space-charge layer is a kind of weakly-conductive layer, existing at both sides of grain boundary core.…”

Synthesis and application of CeO2–NiO loaded TiO2 nanofiber as novel catalyst for hydrogen production from sodium borohydride hydrolysis

“…To test this hypothesis and assess the effects of valence state there is one technique known as doping. In which, impurities has deliberately introduced into a pure substance to enhance their electrochemical properties [36,37]. For this study, Nickel (II) oxide (NiO) was used to form vacancies in the CeO 2 nanoparticle lattice, consequently, it helped to increase the valence state of þ3/þ4 ratio.…”

Structure and microstructure dependent ionic conductivity in 10 mol% Dy2O3 doped CeO2 nanoparticles synthesized by mechanical alloying

“…Doping of trivalent ions such as Gd 3+ [2],Y 3+ [3], Sm 3+ [4], Nd 3+ [5] , Pr 3+ [6] and Dy 3+ [7,8] increase the oxygen ion vacancies in the ceria host which further increase the ionic conductivity of doped ceria based electrolytes [9][10][11]. In this work, we use Dy 3+ as dopant of ceria due to its lower charge (+3) and ionic radius (1.027Å) -almost close to that of Ce (0.97Å).Various reports can be found on Dy-doped ceria and its ionic conductivity [1,7,8].…”

“…Doping of trivalent ions such as Gd 3+ [2],Y 3+ [3], Sm 3+ [4], Nd 3+ [5] , Pr 3+ [6] and Dy 3+ [7,8] increase the oxygen ion vacancies in the ceria host which further increase the ionic conductivity of doped ceria based electrolytes [9][10][11]. In this work, we use Dy 3+ as dopant of ceria due to its lower charge (+3) and ionic radius (1.027Å) -almost close to that of Ce (0.97Å).Various reports can be found on Dy-doped ceria and its ionic conductivity [1,7,8]. Those samples were prepared by various methods such as solid state reaction method [1], solution combustion method [7], carbonate co-precipitation method [8], sol gel method [12] and samples were sintered at high temperatures [1,7].…”