TY - JOUR
T1 - Self-organized Ruthenium–Barium Core–Shell Nanoparticles on a Mesoporous Calcium Amide Matrix for Efficient Low-Temperature Ammonia Synthesis
AU - Kitano, Masaaki
AU - Inoue, Yasunori
AU - Sasase, Masato
AU - Kishida, Kazuhisa
AU - Kobayashi, Yasukazu
AU - Nishiyama, Kohei
AU - Tada, Tomofumi
AU - Kawamura, Shigeki
AU - Yokoyama, Toshiharu
AU - Hara, Michikazu
AU - Hosono, Hideo
N1 - Funding Information:
This work was supported by a fund from the Accelerated Innovation Research Initiative Turning Top Science and Ideas into High-Impact Values (ACCEL) program of the Japan Science and Technology Agency (JST), and the ENEOS Hydrogen Trust Fund. We appreciate the technical assistance of M. Okunaka and S. Fujimoto.
Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/3/1
Y1 - 2018/3/1
N2 - 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 °C. Furthermore, the presented catalysts are superior to the wüstite-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 H2 pretreatment, and the support material is simultaneously converted into a mesoporous structure with a high surface area (>100 m2 g−1). These self-organized nanostructures account for the high catalytic performance in low-temperature ammonia synthesis.
AB - 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 °C. Furthermore, the presented catalysts are superior to the wüstite-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 H2 pretreatment, and the support material is simultaneously converted into a mesoporous structure with a high surface area (>100 m2 g−1). These self-organized nanostructures account for the high catalytic performance in low-temperature ammonia synthesis.
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U2 - 10.1002/anie.201712398
DO - 10.1002/anie.201712398
M3 - Article
C2 - 29356337
AN - SCOPUS:85041191523
VL - 57
SP - 2648
EP - 2652
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 10
ER -