中文摘要：

用溶胶-凝胶法制备了Ce0.8Sm0.2O2-δ（SDC）、SmCoO3（SCO）和SmCo0.8Fe0.2-xNixO3（x=0,0.1,0.2）（SCFN）系列纳米粉体,用XRD、TEM等方法对所制的SCO和SCFN粉体进行了表征;以碳纸为支撑,Ni-SDC粉体为阳极材料,分别以SCO和SCFN系列粉体为阴极、Nafion膜为质子交换膜组成电化学合成氨电池,以湿氢气和湿氮气为原料进行电化学合成氨试验,在低温常压条件下,研究了SCO和SCFN系列粉体在电化学合成氨中的阴极电催化性能。结果表明,在低温常压电化学合成氨中,SCO和SCFN系列粉体均有阴极电催化性能,其中SmCo0.8Fe0.1Ni0.1O3的阴极电催化性能最好,在353K和0.5V条件下,电化学合成氨的速率达到8.01×10-9mol/（s.cm2）。

英文摘要：

The powders of Ce0.8Sm0.2O2-δ（SDC）、SmCoO3（SCO） and SmCo0.8Fe0.2-xNixO3（x=0,0.1,0.2） （SCFN） were synthesized by sol-gel method. The powders were characterized by means of XRD and TEM. Using wet hydrogen and wet nitrogen, the cathode catalytic performance of SCO and SCFN powders at atmospheric pressure and low temperature in electrosynthesis ammonia cell, using SCO and SCFN powders by carbon paper-supported as cathode, Ni-SDC by carbon paper- supported as anode, and Nation proton exchange membrane as proton permeating membrane was studied. The results demonstrated that SCO and SCFN powders had the cathode catalytic ability, and SmCo0.8Fe0.1 Ni0.1O3 had better performance than other SCFN powders in cathode catalyze. The rate of evolution of ammonia is up to 8.01 × 10^-9 mol· s-1· cm-2 at 353K when added 0.5V.