Hydrogen separation using proton-conducting perovskites

Preparation of Nano-Structured La_0.6Sr_0.4Co_0.2Fe_0.8O_{3−δ} Cathode for Protonic Ceramic Fuel Cell by Bead-Milling Method

“…Electrode overpotentials were evaluated by a current interrupt method as follows. 24) The electric potentials of the anode and cathode against the reference electrode, V AR ( j) and V RC ( j), were measured as a functions of the current density, j. The overpotentials, defined as the changes in the potentials from those under open circuit condition, consist of electrode reaction polarization, © AR and © RC , overpotentials due to the changes in hydrogen concentrations were ignored because of the hydrogen partial pressure constant in the measurement, ohmic losses, iR AR and iR RC , are shown in eqs.…”

Efeito da adição de óxido de zinco e de óxido de boro nas propriedades do zirconato de bário dopado com ítrio

“…Tem ampla utilização no setor industrial, seja no monitoramento de oxigênio em gases de exaustão de canos de escapamento de automóveis ou no monitoramento de oxigênio em processos metalúrgicos [13][14][15]. Um sensor de oxigênio é geralmente constituído por um eletrólito sólido na forma de tubo fechado em uma extremidade, recoberto interna e externamente por eletrodos metálicos.…”

Hydrogen permeation of BaCe_0.80Y_0.20O_{3&minus;&delta;}&ndash;Gd_0.1Ce_0.9O<i>_x</i> dual-phase membranes

“…9), 24) On the other hand, the Arrehnius plot for the GDC pellet could not be fitted by a single straight line. The activation energy in 600700°C was 0.51 eV and that in 800900°C was 0.05 eV.…”

“…BCY exhibits a high proton transport number at 500600°C in a humid H 2 atmosphere, and proton separation can be achieved using an external power source. 9) Hydrogen separation using mixed ionicelectronic conductors (MIEC) has also been extensively examined because it can be achieved without using a power source. 10),11) In a dense membrane of these materials, only protons and electrons migrate along the chemical potential gradient and then recombine to generate pure hydrogen at the opposite side of the conductor.…”