期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 10, 页码 2648-2652出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201712398
关键词
alkaline-earth-metal amides; core-shell structures; low-temperatures; mesoporous; ruthenium
资金
- Accelerated Innovation Research Initiative Turning Top Science and Ideas into High-Impact Values (ACCEL) program of the Japan Science and Technology Agency (JST)
- ENEOS Hydrogen Trust Fund
A low-temperature ammonia synthesis process is required for on-site synthesis. Barium-doped calcium amide (Ba-Ca(NH2)(2)) enhances the efficacy of ammonia synthesis mediated by Ru and Co by 2 orders of magnitude more than that of a conventional Ru catalyst at temperatures below 300 degrees C. Furthermore, the presented catalysts are superior to the wustite-based Fe catalyst, which is known as a highly active industrial catalyst at low temperatures and pressures. Nanosized Ru-Ba core-shell structures are self-organized on the Ba-Ca(NH2)(2) support during H-2 pretreatment, and the support material is simultaneously converted into a mesoporous structure with a high surface area (>100m(2)g(-1)). These self-organized nanostructures account for the high catalytic performance in low-temperature ammonia synthesis.
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