利用Nafion膜和SFCN在低温常压下电化学合成氨

用溶胶-凝胶法制备了Ce0.8Sm0.2O2δ（SDC）和SmFe0.7Cu0.3-xNixO3（x=0,0.1,0.2,0.3）（SFCN）系列超细粉体,用XRD、TEM和SEM等方法对其进行了表征.分别将NiO-SDC和SFCN系列超细粉体干压成片并烧结成陶瓷,以SFCN系列陶瓷片为阴极,Nafion膜为电解质,NiO-SDC还原后得到的Ni-SDC金属陶瓷为阳极,银-铂网为集流体组成单电池,在低温常压下研究了其在电化学合成氨中的性能.结果表明：在25-100℃和施加电压的条件下,使用SFCN系列陶瓷片为阴极时均有氨气在阴极生成,其中SmFe0.7Cu0.1Ni0.2O3作阴极时电化学合成氨的性能最佳,在80℃时氨的合成速率为1.13×10^-8mol·s^-1·cm^-2,其电流效率为90.4%.

Using the nafion membrane and SFCN to synthesize ammonia at atmospheric pressure and lower temperature

Samaria-doped ceria Ce0.8Sm0.2O2-δ（SDC） and SmFe0.7Cu0.3-xNixO3 have been synthesized by the sol-gel method and characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （SEM）. The electrochemical synthesis of ammonia was investigated at atmospheric pressure and low temperature, using the SFCN materials were used as the cathode, a Nation membrane as the electrolyte, nickel-doped SDC （Ni-SDC） as the anode and silver-platinum paste as the current collector. Ammonia was synthesized from 25℃ to 100℃ when the SFCN materials were used as cathode, with SmFe0.7Cu0.1Ni0.2O3 giving the highest rates of ammonia formation. The maximum rate of evolution of ammonia was 1.13 × 10^-8 mol/cm^2.s at 80℃, and the current efficiency reached as high as 90.4%.