Phase stability and hydrogen permeation performance of BaCo0·4Fe0·4Zr0·1Y0·1O3-δ ceramic membranes

Tuning proton kinetics in BaCo0.4Fe0.4Zr0.2–XYXO3–δ triple ionic-electronic conductors via aliovalent substitution

“…In all samples, long-term reduction causes a lattice expansion with a shift toward lower angles, likely due to the reduction of multivalent metal ions Co and Fe. 29,30…”

“…In all samples, longterm reduction causes a lattice expansion with a shi toward lower angles, likely due to the reduction of multivalent metal ions Co and Fe. 29,30 In tandem with the XRD and EDX studies, the permeation ux was measured against exposure time. Although temperature changes were taken in between measurement times, the ux at the same temperature over the course of 50 h remained relatively constant, and within the range of error of each sampling period.…”

“…28 Numerous recent studies have probed protonic conductivity using gas permeation on BCFZY0.1 and its modied derivatives. [29][30][31][32][33] However, systematic studies on the bulk protonic conductivity by varying aliovalent doping, like those performed in ionic conductors such as BaZr 1−X Y X O 3−d (BZY), 34 are lacking in this system.…”

Fundamental Understanding and Applications of Protonic Y‐ and Yb‐Coped Ba(Ce,Zr)O3 Perovskites: State‐of‐the‐Art and Perspectives

“…[27,28] The use of PCOMs is associated with many advantages, [29][30][31][32] including a significant reduction of SOFC and SOEC operation temperatures (down to 400-600 °C) as compared with classical devices based on oxygen-conducting electrolytes (which typically operate at temperatures above 700 °C), as well as the realization of unique H-participating conversion processes, such as non-oxidative alkane dehydration and non-catalytic alcohol or ammonia synthesis. [33,34] PCOMs, whose electron conductivity is much lower than their ionic conductivity, are generally described as proton-conducting electrolytes. The pioneering studies carried out by the research group led by H. Iwahara on perovskite-based electrolytes in the early 1980s [35][36][37] served as the starting point for further active research of such PCOMs.…”

Zirconia-Doped Methylated Silica Membranes via Sol-Gel Process: Microstructure and Hydrogen Permselectivity

“…In recent years, research on hydrogen separation membranes has mainly focused on molecular sieves, alloys, and microporous silica [6][7][8][9]. Prominently, silica membranes have received extensive attention for H 2 separation due to their advantages such as high permselectivity and considerable thermal stability [10]. Amorphous silica membranes derived from sol-gel and chemical vapor deposition (CVD) methods received an enormous amount of attention [11,12].…”