多层膜结构BaCe_(0.9)Nd_(0.1)O_(3-δ)的制备及其在常压合成氨中的应用

Synthesis of BaCe_(0.9)Nd_(0.1)O_(3-δ) Multilayer Membrane and Its Application to Ammonia Synthesis at Atmospheric Pressure

用干压法制备了Ni-BaCe0.9Nd0.1O3-δ多孔金属陶瓷阳极,并在阳极基膜上制备出致密的BaCe0.9Nd0.1O3-δ固体电解质薄膜。薄膜的厚度约为40μm,致密均匀。测定了多层膜结构BaCe0.9Nd0.1O3-δ在干燥氮气/湿润氢气气氛中的电导率,结果表明其电导率要比厚膜BaCe0.9Nd0.1O3-δ和SrCe0.95Y0.05O3-δ(SCY)要高。将多层膜材料用于固态质子传导电池中,在常压下以氮气和氢气为原料合成了氨气。结果表明,与SCY固体电解质比较,氨的产率提高了一个数量级以上。

The porous Ni-BaCe0.9Nd0.1O3-δ cermet,which was used as the anode are fabricated by dry-pressing process.The dense BaCe0.9Nd0.1O3-δ film on the anode substrates was prepared successfully.The BaCe0.9Nd0.1O3-δ film was characterized to be around 40 μm in thickness,sufficiently dense and uniform.The electrical conductivity of the multilayer membrane structure BaCe0.9Nd0.1O3-δ was measured in dry N2/wet H2 atmosphere and it was higher than that of thick BaCe0.9Nd0.1O3-δ and SrCe0.95Y0.05O3-δ(SCY).Ammonia was synthesized from nitrogen and hydrogen at atmospheric pressure in the solid state proton conducting cell reactor using multilayer membrane system.The result indicated that using multilayer membrane structure BaCe0.9Nd0.1O3-δ can obtain higher ammonia conduction one order of magnitude larger than that of SCY electrolyte.