Enhanced Catalytic Ammonia Synthesis with Transformed BaO
Enhanced Catalytic Ammonia Synthesis with Transformed BaO
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DOI：
10.1021/acscatal.8b02839
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发表时间：
2018-12-01
期刊：
影响因子：
12.9
通讯作者：
Hosono, Hideo
中科院分区：
文献类型：
--
作者：
Hattori, Masashi;Mori, Taiyo;Hosono, Hideo
我们报道了BaO和CaH2粉末与钌纳米颗粒的简单混合物作为低温氨合成的有效非均相催化剂，其活化能非常小（41 kJ mol(-1)）。这种材料的高催化性能既不是由于原有的CaH2粒子，也不是由于BaO粒子，而是由于与CaH2反应转化的BaO粒子。转化后的BaO含有稳定、强给电子材料BaH2，有利于可逆储氢-释放反应，显著增强了对Ru的给电子，具有较高的催化性能。
We 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.