Water as a hole-predatory instrument to create metal nanoparticles on triple-conducting oxides

Abstract

Single-phase materials with mixed ionic and electronic conductivity underpin multiple solid-state electrochemical devices as promising electrodes. In particular, triple-conducting oxides that carry protons, oxygen ions, and electron holes simultaneously have...

Perovskites for protonic ceramic fuel cells: a review

“…During the last decade, considerable research efforts have been directed to the development of alternative cathodes for PCFCs. 17–19 Among them, perovskite-based electrodes have received the most attention because of their compositional flexibility and versatile properties. Various perovskite-type oxygen ion and electron co-conducting, and proton, oxygen ion and electron triple-conducting oxides have been exploited.…”

“…During the last decade, considerable research efforts have been directed to the development of alternative cathodes for PCFCs. [17][18][19] Among them, perovskite-based electrodes have received the most attention because of their compositional…”

Metal nanoparticles at grain boundaries of titanate toward efficient carbon dioxide electrolysis

“…The exsolution of transition metals in perovskite oxides (ABO 3 ) is considered as an intelligent catalyst design for energy applications. 22,23 It is oen observed that oxygen vacancies alter the surface segregation of the doping elements present in perovskite. SrTiO 3 , which is oen studied in defect chemistry, is the prototype of perovskite oxide.…”

High-Performance Protonic Ceramic Electrochemical Cells

“…Hence, PCECs can provide high electrochemical performance at intermediate to low working temperatures (450−650 °C). 2 Ba-based perovskite materials including BaCe 0.75 Y 0.15 O 3-δ (BCY), BaZr 0.85 Y 0.15 O 3-δ (BZY), and BaZr 0.1 Ce 0.7 Y 0.2 O 3-δ (BZCY) have been used as electrolyte materials owing to their high proton conducting properties. 3−5 However, in the case of conventional sintering using heat convection, the poor sinterability nature of the protonic perovskite oxides inevitably requires high temperatures (>1500 °C) and long durations (up to ∼20 h) in the sintering process to achieve highly dense electrolyte structures (left side of Figure 1).…”

“…Proton conduction (H + ) in oxides has a significantly lower activation energy (0.4–0.6 eV) than oxygen ion conduction (O 2– ). Hence, PCECs can provide high electrochemical performance at intermediate to low working temperatures (450–650 °C) …”