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 CaH2 powders
with ruthenium nanoparticles acts as an effective heterogeneous catalyst
for low-temperature ammonia synthesis with a very small activation
energy (41 kJ mol–1). The high catalytic performance
of this material is not due to either the original CaH2 or BaO particles but to BaO transformed by reaction with CaH2. The transformed BaO contains BaH2, 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.
