In situ synthesis of extremely small, thermally stable perovskite nanocatalysts for high-temperature electrochemical energy devices

• DOI: 10.1016/j.cej.2023.146924
• Publication Date: 2023-10-24T16:18:21Z
• Authors: Mi Young Park; Jisu Shin; Sun-Young Park; Ji-eun Won; Jun Yeon Hwang; Seungki Hong; Si-Won Kim; Ji-Hoon Jang; Kyung Joong Yoon
• Keywords: Nanomaterial-based catalyst; Nanomaterials; Degradation

High-temperature solid oxide cells (SOCs) offer one of the most efficient and versatile routes for producing electric power H2. However, practical use nanomaterials in SOCs has been limited by their lack thermal stability. In this study, we present an infiltration technique that enables situ synthesis extremely small, thermally stable perovskite (Sm0.5Sr0.5)CoO3 nanocatalysts on inner surface porous SOC electrodes. We identified certain impurity phases, such as SrCO3, cause fatal degradation eliminated them using a rational complexation strategy optimized individual constituent cations. Consequently, fabricated ∼ 20 nm diameter, highly pure, single-phase achieved more than double performance cell with standard (La,Sr)(Co,Fe)O3– (La,Sr)CoO3-based air electrode. The stably operated during long-term tests both generation H2 production modes, negligible degradation. Furthermore, successfully scaled up process to fabricate large-scale commercial fully automated process. key findings study will resolve critical barriers high-temperature accelerate commercialization technology.