阴极催化剂Sm1.5Sr0.5MO4 (M＝Ni, Co, Fe)在低温常压下合成氨

利用溶胶—凝胶法制备了复合氧化物Sm1.5Sr0.5MO4 (M＝Ni, Co, Fe)(SSM)，并利用XRD和SEM等对样品进行表征。用Nafion膜作电解质、以SSM作为阴极、Ni-SDC金属陶瓷为阳极、银-铂网做集流体组成单电池，在温度为25℃～100℃的低温常压下以干燥氮气和湿的氢气为原料进行电化学合成氨气测定，同时研究了影响氨合成的关键因素,确定了合适的工作温度,实验结果表明，最高氨产率可达到1.05×10-8mol·s-1·cm-2。

Sm1.5Sr0.5MO4 (M=Ni,Co, Fe) Cathode Catalysts for Ammonia Synthesis at Atmospheric Pressure and Low Temperature

Sm_1.5Sr_0.5MO₄ (M=Ni, Co, Fe) (SSM) catalysts were prepared by a sol‐gel method and characterized by X‐ray diffraction (XRD) and scanning electron microscopy (SEM). Ammonia was synthesized from wet hydrogen and dry nitrogen at atmospheric pressure and low temperature (25–100 °C) with applied voltage, using SSM as a cathode, Ni‐Ce_0.8Sm_0.2O_2?δ (Ni‐SDC) as an anode, and silver‐platinum film as a current collector, Nafion proton exchange membrane as a proton permeating membrane. Several important factors on ammonia synthesis were investigated and the optimal synthetic temperature was found, at which the highest rate of evolution of ammonia was up to 1.05×10^?8 mol·cm^?2·s^?1.