This study reveals the effect of the catalytic 1D supports (carbon, ceria, alumina and titanate) for ruthenium particles on the low temperature release of hydrogen from ammonia. While the state-of-art literature presents Ru/carbon nanotubes (CNT) as the most active catalyst, we found in this work that ruthenium supported on ceria nanorods (Ru/CeO₂) catalyst exhibited activity over 8 times higher than the Ru/CNT counterpart system. This enhanced activity is believed to be related to a strong metal-support interaction on the Ru/CeO₂ catalysts promoting the formation of small (~ 3 nm) Ru particles. Addition of sodium as a promoter leads to the formation of smaller Ru particle sizes in addition to the modification of the electronic environment of Ru, enhancing the ammonia decomposition activity at low temperatures. This effect is particularly noticeable in the Ru–Na/CNT catalysts, facilitated by the high conductivity of the support, allowing distant electronic modification of the Ru active sites. This work provides novel insights in designing catalysts for hydrogen production from ammonia in our effort to enable the long-term energy storage in chemical bonds.

这项研究揭示了钌颗粒的一维催化性载体（碳，二氧化铈，氧化铝和钛酸酯）对氨中氢的低温释放的影响。最新的文献显示Ru /碳纳米管（CNT）是最具活性的催化剂，但我们在这项工作中发现，负载在二氧化铈纳米棒上的钌（Ru / CeO ₂）催化剂的活性是Ru /碳纳米管的8倍以上。 CNT对应系统。据信这种增强的活性与Ru / CeO ₂上的强金属-载体相互作用有关。催化剂促进小（〜3 nm）Ru颗粒的形成。除了改性Ru的电子环境外，添加钠作为促进剂还导致形成较小的Ru粒径，从而增强了低温下的氨分解活性。这种作用在Ru-Na / CNT催化剂中尤为明显，这是由于载体的高电导率促进了Ru活性位点的远距离电子修饰。这项工作为设计从氨中制氢的催化剂提供了新的见解，我们致力于使化学键能够长期存储能量。