Pd负载型介孔ZrO2-TiO2复合材料的设计合成及其CO催化氧化性能研究

无机材料学报, 2013, 28(9): 992-996. doi: 10.3724/SP.J.1077.2013.12711

Pd负载型介孔ZrO2-TiO2复合材料的设计合成及其CO催化氧化性能研究

龚云 ^1, , 陈航榕 ^2, , 崔香枝 ^3, , 江莞 ^4, , 施剑林 ^5,

1.中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050

2.中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050

3.中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050

4.东华大学纤维材料改性国家重点实验室,上海,201620

5.中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050

基金项目: 国家自然科学青年基金(51202278) 国家杰出青年科学基金(51225202) National Key Basic Research Program of China(2013CB933200) 国家重大科技基础研究发展计划(973)(2013CB933200) National Natural Science Foundation of China(51202278) China National Funds for Distinguished Young Scientists(51225202)

关键词： Pd催化剂 , ZrO2-TiO2 , CO氧化 , 介孔结构

Pd Loaded Mesoporous ZrO2-TiO2 Composite and Its CO Catalytic Oxidation Property

Keywords： Pd loaded catalysts , ZrO2-TiO2 , CO oxidation , mesoporous structure

以介孔结构的复合ZrO2-TiO2为载体负载活性组分,制备了具有高CO催化氧化活性的Pd/ZrO2-TiO2与PdCu/ZrO2-TiO2负载型催化剂.XRD、TEM研究结果表明:活性组分Pd、Cu物种可均匀分散于介孔载体中.系统考察了不同的催化剂载体、制备方法和助催化剂等对该介孔复合材料CO催化氧化性能的影响,结果表明:以ZrO2-TiO2为载体的催化剂其CO催化氧化活性明显优于以介孔A12O3或介孔SBA-15为载体的催化剂；一步法制备的介孔Pd/ZrO2-TiO2催化剂其CO催化氧化的低温活性较浸渍法制备的Pd/ZrO2-TiO2有很大提高；并且Pd和Cu物种共负载的介孔ZrO2-TiO2复合催化剂具有最优的CO催化氧化活性,其CO的完全催化氧化温度可降至170℃,O2-TPD分析说明Pd和Cu之间的相互作用使得PdCu/ZT催化剂在更低温度具有氧化还原活性.

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