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Electron Donation by Low-Crystalline Ba-La-Ce Oxygen-Deficient Composite Oxide Accumulating on Ru Nanoparticles for Ammonia Synthesis under Mild Conditions

preprint
submitted on 25.02.2019 and posted on 25.02.2019 by Katsutoshi Sato, Shin-ichiro Miyahara, Yuta Ogura, Kotoko Tsujimaru, Yuichiro Wada, Takaaki Toriyama, Tomokazu Yamamoto, Syo Matsumura, Katsutoshi Nagaoka

To mitigate global problems related to energy and global warming, it is helpful to develop an ammonia synthesis process using catalysts that are highly active under mild conditions. Here we show that the ammonia synthesis activity of Ru/Ba/LaCeOx pre-reduced at 700 °C is the highest reported among oxide-supported Ru catalysts. Our results indicate that low crystalline oxygen-deficient composite oxides, which include Ba2+, Ce3+ and La3+, with strong electron-donating ability, accumulate on Ru particles and thus promote N≡N bond cleavage, which is the rate determining step for ammonia synthesis.

Funding

CREST, JST

History

Email Address of Submitting Author

nagaoka@oita-u.ac.jp

Institution

Oita University

Country

Japan

ORCID For Submitting Author

0000-0003-1774-1537

Declaration of Conflict of Interest

No conflic of interest

Version Notes

First version

Exports