Development of catalysts for H2 production by ammonia decomposition under mild reaction condition

目前，NH3已被认为是最有潜力的储氢材料之一。本研究开发了一种新型负载型金属催化剂，用于在温和的反应条件下氨分解制取可再生氢气。为此，使用碱性类水滑石化合物作为镁铝氧化物载体的前驱体。结果表明，在573K、空速为3000h-1的条件下，5wt%Ru/Cs2O/Mg-Al_2O_3催化剂对NH3的转化率为51%。此外，无Ru的Ni催化剂CeO2/15wt%Ni/Mg-Al-氧化物在773K时也能几乎完全转化NH3。

Nowadays NH3 has been regarded as one of the potential H2-storage materials. In this research, novel supported metal catalysts for producing renewable hydrogen by ammonia decomposition under mild reaction condition was developed. For that purpose, basic hydrotalcite-like compound was used as precursor for Mg-Al oxide support. It was revealed that 5 wt%Ru/Cs2O/Mg-Al-oxide converts 51% of NH3 even at 573 K with a space velocity of 3000 h-1. Furthermore, Ru-free Ni catalyst, CeO2/15wt%Ni/ Mg-Al-oxide, was found to exhibit almost complete conversion of NH3 even at 773 K.