Ru改性的铁基钙钛矿体系的催化性能研究

材料科学与工艺, 2004, 12(3): 249-257. doi: 10.3969/j.issn.1005-0299.2004.03.007

Ru改性的铁基钙钛矿体系的催化性能研究

李丽 ^1, , 袁福龙 ^2, , 姜安玺 ^3, , 光焕竹 ^4, , 张国 ^5, , 付宏刚 ^6,

1.哈尔滨工业大学,市政环境工程学院,黑龙江,哈尔滨,150090;黑龙江大学,化学化工学院,黑龙江,哈尔滨,150080

2.黑龙江大学,化学化工学院,黑龙江,哈尔滨,150080;哈尔滨工业大学,机电学院,黑龙江,哈尔滨,150001

3.哈尔滨工业大学,市政环境工程学院,黑龙江,哈尔滨,150090

4.黑龙江大学,化学化工学院,黑龙江,哈尔滨,150080

5.黑龙江大学,化学化工学院,黑龙江,哈尔滨,150080

6.黑龙江大学,化学化工学院,黑龙江,哈尔滨,150080

基金项目: 黑龙江大学校科研和教改项目(Q200124;Q200341) 黑龙江省科技攻关项目(GC01A2162) 黑龙江省自然科学基金(B00-06) 国家自然科学基金(20271019) 黑龙江大学校科研和教改项目(JC-2000-2)

关键词：钙钛矿型复合氧化物 , 三效催化剂 , 催化活性 , 起燃温度

Catalytic properties of iron-based perovskite type compound with Ru modified

为研究Ru改性的铁基钙钛矿体系的催化性能,用溶胶-凝胶法分别制备了不同x、y、n值的La1-xCexFe1-y-nCoy RunO3系列化合物,在模拟条件下,以起燃温度和气体转化效率为90%时的温度为评价指标测定了HC、CO及NOx的三效催化活性.研究表明:改性催化剂具有更高的催化活性和抗老化能力;Ru的引入可大幅度提高催化活性,且催化活性与Ru离子的掺杂量成正比;La0.8Ce0.2Fe0.7Co0.2Ru0.1O3样品的催化性能较佳,起燃温度分别可达到HC 295℃、CO 280℃,NOx 280℃.

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