Enhanced Catalytic Ammonia Synthesis with Transformed BaO
journal contribution
posted on 2018-10-18, 00:00 authored by Masashi Hattori, Taiyo Mori, Tomohiro Arai, Yasunori Inoue, Masato Sasase, Tomofumi Tada, Masaaki Kitano, Toshiharu Yokoyama, Michikazu Hara, Hideo HosonoWe
report that a simple mixture of BaO and CaH<sub>2</sub> powders
with ruthenium nanoparticles acts as an effective heterogeneous catalyst
for low-temperature ammonia synthesis with a very small activation
energy (41 kJ mol<sup>–1</sup>). The high catalytic performance
of this material is not due to either the original CaH<sub>2</sub> or BaO particles but to BaO transformed by reaction with CaH<sub>2</sub>. The transformed BaO contains BaH<sub>2</sub>, a stable and
strong electron-donating material that facilitates a reversible hydrogen
storage-release reaction and significantly enhances electron donation
to Ru, which results in high catalytic performance.
History
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