SmCo_(0.8)Fe_(0.2-x)Ni_xO_3(x=0,0.1,0.2)系列陶瓷在低温常压电化学合成氨中的阴极催化性能研究Cathode Catalytic Performance of SmCo_(0.8)Fe_(0.2-x)Ni_xO_3 Ceramics in Electrosynthesis Ammonia at Atmospheric Pressure and Low Temperature
韩慧;刘瑞泉;
摘要(Abstract)：
用溶胶-凝胶法制备了Ce0.8Sm0.2O2-δ(SDC)和SmCo0.8Fe0.2-xNixO3(x=0,0.1,0.2)(SCFN)系列纳米粉体并烧结为陶瓷片,用XRD、TEM、SEM对粉体和烧结体结构进行了表征,分别以SCFN系列陶瓷为阴极,Nafion膜为质子交换膜,Ni-SDC金属陶瓷为阳极,银-铂网做集流体组成电解池.以湿氢气和氮气为原料,在低温常压下研究了SCFN系列陶瓷材料在电化学合成氨中的阴极催化性能,结果表明:SCFN中Fe、Ni的含量影响其阴极催化性能,其中以SmCo0.8Fe0.1Ni0.1O3的催化性能最佳,在353K和常压条件下,合成氨速率达到9.69×10-9mol·s-1·cm-2.
关键词(KeyWords)： Nafion膜;Ni-SDC;SCFN;低温常压;电化学合成氨
基金项目(Foundation): 国家自然科学基金项目(20863007)
作者(Authors): 韩慧;刘瑞泉;
参考文献(References)：
- [1]Marnellos G,Stoukides M.Ammonia Synthesis at Atmospheric Pressure[J].Science,1998,282:98-100.
- [2]George M,Stergios Z,Michael S.Synthesis of Ammonia at Atmospheric Pressure with the Use of Solid State Proton Conductors[J].Journal of Catalysis,2000,193:80-87.
- [3]Yiokari C G,Pitselis G E,Polydoros D G,et al.High-Pressure Electrochemical Promotion of Ammonia Synthesis over an Industrial Iron Catalyst[J].Phys Chem A,2000,104:10600-10602.
- [4]张高文,周震涛.磺化聚醚醚酮膜的制备及性能[J].电池,2005,35(4):292-294.
- [5]王进,刘瑞泉,王吉德.磺化聚砜质子交换膜在低温常压电化学合成氨中的应用[J].科学通报,2008,53(9):1032-1035.
- [6]王进,刘瑞泉.SDC和SSC在低温常压电化学合成氨中的性能研究[J].化学学报,2008,66(7):717-721.
- [7]Xia C R,William R,Chen F L,et al.Sm0.5Sr0.5CoO3cathodes for low-temperature SOFCs[J].Solid State Ion-ics,2002,149:11-19.
- [8]李彦,余春江.Ni-SDC固体氧化物燃料电池阳极的合成和性质[J].中国稀土学报,2006,24(1):32-36.
- [9]刘玉星,刘瑞泉,王吉德.La0.9Sr0.1Al0.9Mg0.1O3-δ-Ca3(PO4)2-K3PO4复合电解质的合成及在常压天然气合成氨中的应用[J].无机化学学报,2007,23(2):339-342.
- [10]Li Z J,Liu R Q,Xie Y H,et al.A new method of preparation of doped Ba3(Ca1.18Nb1.82)O9-δand their application in synthesizing of ammonia at atmospheric pressure[J].Solid State Ionic,2005,6(11-12):1063-1066.
- [11]史雅珍,熊新向,谌翔希.奈氏试剂与铵离子的显色反应及光度法定氮[J].武汉冶金科技大学学报,1998,21(1):40-43.