As ammonia beneficial properties consideration as a next-generation vitality supply able to overcoming the boundaries of hydrogen storage and transport, KAIST and a joint analysis workforce have developed gas cell expertise that immediately makes use of ammonia as gas whereas attaining world-class efficiency and stability. This achievement is considered a core expertise that can speed up the commercialization of the next-generation hydrogen economic system and carbon-free energy era.
KAIST (President Kwang Hyung Lee) introduced on the twentieth of May that Professor Kang Taek Lee and Professor Joongmyeon Bae of the Department of Mechanical Engineering, along with a joint analysis workforce together with Dr. Tae Ho Shin of the Korea Institute of Ceramic Engineering and Technology (KICET, President Jong-Suk Yoon) and Dr. Ki-Min Roh of the Korea Institute of Geoscience and Mineral Resources (KIGAM, President Kwon Yi Kyun), have developed catalyst expertise that dramatically improves the efficiency and sturdiness of ammonia-based protonic ceramic gas cells (PCFCs, next-generation high-efficiency gas cells that generate electrical energy by transporting hydrogen ions).
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Ammonia is attracting consideration as a next-generation hydrogen service (Energy Carrier, a medium that shops and transports hydrogen) as a result of it’s straightforward to retailer and transport in liquid type. It can also be considered a consultant carbon-free gas as a result of it consists solely of nitrogen (N) and hydrogen (H), producing nearly no carbon dioxide (CO₂) throughout energy era. However, inside gas cells, ammonia has prompted issues by damaging nickel-based supplies and slowing response charges, resulting in efficiency degradation and shortened lifespan.
To clear up this drawback, the analysis workforce designed a brand new catalyst construction combining a “high-entropy” oxide catalyst (High-Entropy, a design technique that enhances materials stability and efficiency by mixing a number of components) that improves structural stability by mixing a number of components, with metallic nanoparticles (Nano Particle, ultrafine metallic particles on the nanometer scale) that type spontaneously on the floor throughout operation.
This catalyst was discovered not solely to withstand structural collapse even in an ammonia setting, but in addition to successfully promote the response that decomposes ammonia into hydrogen. Through density useful concept (DFT, Density Functional Theory, a simulation technique that calculates response mechanisms on the atomic degree) evaluation, the analysis workforce recognized that the high-entropy oxide construction lowers the vitality barrier required for ammonia decomposition and promotes the formation of metallic particles.
In specific, the metallic alloy nanoparticles that shaped spontaneously on the catalyst floor confirmed a lot larger catalytic exercise than single-metal catalysts. A gas cell making use of this catalyst recorded a most energy density of two.04 W per unit space (1 cm²) at 700°C. This implies that excessive energy will be produced from an space the dimensions of a fingernail, representing world-class efficiency within the discipline of ammonia-based protonic ceramic gas cells that generate electrical energy by transporting hydrogen ions (protons).
In addition, the cell operated stably for greater than 255 hours even underneath harsh circumstances of 600°C, considerably bettering the issue of efficiency degradation (a phenomenon during which efficiency decreases over time) seen in current catalysts.
Professor Kang Taek Lee acknowledged, “Through the synergistic structure of high-entropy oxides and alloy nanoparticles, we improved both the performance and durability of ammonia fuel cells,” including, “This study will serve as a catalyst for accelerating the commercialization of ammonia-based carbon-free power generation technology and next-generation hydrogen energy systems.”
This analysis, with Dr. Dongyeon Kim of the Department of Mechanical Engineering at KAIST, researcher Dong Jae Park of the Korea Institute of Ceramic Engineering and Technology, and Dr. Incheol Jeong of the Korea Institute of Geoscience and Mineral Resources as co-first authors, was printed on April 17 in Nano-Micro Letters (IF: 36.3), a global journal within the fields of vitality and supplies.
※ Paper title: “Entropy-Modulated Oxide–Metal Catalyst Architectures for Direct Ammonia Protonic Ceramic Fuel Cells,” DOI: https://link.springer.com/article/10.1007/s40820-026-02194-9
This analysis was supported by the Mid-Career Researcher Program of the Ministry of Science and ICT, the Global Basic Research Laboratory Program, the InnoCORE Program of the Institutes of Science and Technology, and the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources.