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タイトル: | A low-crystalline ruthenium nano-layer supported on praseodymium oxide as an active catalyst for ammonia synthesis |
著者: | Sato, Katsutoshi Imamura, Kazuya Kawano, Yukiko Miyahara, Shin-ichiro Yamamoto, Tomokazu Matsumura, Syo Nagaoka, Katsutoshi |
著者名の別形: | 佐藤, 勝俊 |
発行日: | Jan-2017 |
出版者: | Royal Society of Chemistry (RSC) |
誌名: | Chemical Science |
巻: | 8 |
号: | 1 |
開始ページ: | 674 |
終了ページ: | 679 |
抄録: | Ammonia is a crucial chemical feedstock for fertilizer production and is a potential energy carrier. However, the current method of synthesizing ammonia, the Haber–Bosch process, consumes a great deal of energy. To reduce energy consumption, a process and a substance that can catalyze ammonia synthesis under mild conditions (low temperature and low pressure) are strongly needed. Here we show that Ru/Pr2O3 without any dopant catalyzes ammonia synthesis under mild conditions at 1.8 times the rates reported with other highly active catalysts. Scanning transmission electron micrograph observations and energy dispersive X-ray analyses revealed the formation of low-crystalline nano-layers of ruthenium on the surface of Pr2O3. Furthermore, CO2 temperature-programmed desorption revealed that the catalyst was strongly basic. These unique structural and electronic characteristics are considered to synergistically accelerate the rate-determining step of NH3 synthesis, cleavage of the N[triple bond, length as m-dash]N bond. We expect that the use of this catalyst will be a starting point for achieving efficient ammonia synthesis. |
著作権等: | This journal is © The Royal Society of Chemistry 2017. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
URI: | http://hdl.handle.net/2433/226367 |
DOI(出版社版): | 10.1039/C6SC02382G |
PubMed ID: | 28451216 |
出現コレクション: | 学術雑誌掲載論文等 |
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