Ni/NiO Exsolved Perovskite LaSrTiNiO for Semiconductor-Ionic Fuel Cells: Roles of Electrocatalytic Activity and Physical Junctions.

A semiconductor-ionic fuel cell (SIFC) is recognized as a promising technology and an alternative approach to reduce the operating temperature of solid oxide fuel cells. The development of alternative semiconductors substituting easily reduced transition metal oxide is a great challenge as high activity and durability should be satisfied simultaneously. In this study, the B-site Ni-doped LaSrTiNiO (LSTN) perovskite is synthesized and used as a potential semiconductor for SIFC.

Mutual Conversion of CO-CO on a Perovskite Fuel Electrode with Endogenous Alloy Nanoparticles for Reversible Solid Oxide Cells.

Reversible solid oxide cells (RSOCs) can efficiently render the mutual conversion between electricity and chemicals, for example, electrolyzing CO to CO under a solid oxide electrolysis cell (SOEC) mode and oxidizing CO to CO under a solid oxide fuel cell (SOFC) mode. Nevertheless, the development of RSOCs is still hindered, owing to the lack of catalytically active and carbon-tolerant fuel electrodes. For improving mutual CO-CO conversion kinetics in RSOCs, here, we demonstrate a high-performing and durable fuel electrode consisting of redox-stable Sr(Fe, Mo)O perovskite oxide and epitaxially endogenous NiFe alloy nanoparticles.