| 高分散负载Pd催化剂上CO氧化性能 |
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| 引用本文： | 王昭文,陈明树,万惠霖.高分散负载Pd催化剂上CO氧化性能[J].厦门大学学报(自然科学版),2011,50(1):65-69. |
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| 作者姓名： | 王昭文 陈明树 万惠霖 |
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| 作者单位： | 厦门大学,化学化工学院,固体表面物理化学国家重点实验室,醇醚酯化工清洁生产国家工程实验室,福建,厦门,361005 |
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| 基金项目： | 国家自然科学基金资助项目(20873109,21073149); 科技部973项目(2010CB732303); 教育部科学技术研究重大项目(309019),教育部博士点基金(200803841011); 福建省自然科学基金资助项目(2008J0168) |
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| 摘 要： | 制备高分散的负载型催化剂是充分利用在自然界中储量极为有限的贵金属资源的重要手段.采用不同方法制备一系列负载Pd催化剂,考察了不同载体负载Pd催化剂的CO氧化性能.发现以乙酰丙酮钯为前驱体制得的Pd/TiO2催化剂活性远高于Pd/SiO2和Pd/Al2O3催化剂的活性,在室温下就表现出较好的CO氧化活性,且在无气相O2条件下CO可以与Pd/TiO2催化剂表面的氧物种(晶格氧)反应生成一定量的CO2.分散度测试、CO吸附的原位红外光谱和程序升温还原的结果表明Pd/TiO2催化剂上Pd物种以高分散Pd0形式存在,并与载体之间存在强相互作用,这可能是Pd/TiO2催化剂具有低温活性的主要原因.
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| 关 键 词： | CO催化氧化 钯 负载型催化剂 原位谱学表征 |
CO Oxidation over Highly Dispersive Supported Palladium Catalysts |
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| WANG Zhao-wen,CHEN Ming-shu,WAN Hui-lin.CO Oxidation over Highly Dispersive Supported Palladium Catalysts[J].Journal of Xiamen University(Natural Science),2011,50(1):65-69. |
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| Authors: | WANG Zhao-wen CHEN Ming-shu WAN Hui-lin |
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| Institution: | WANG Zhao-wen,CHEN Ming-shu,WAN Hui-lin(State Key Laboratory of Physical Chemistry of Solid Surfaces,National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China) |
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| Abstract: | In present studies,a series of oxide supported palladium catalysts were synthesized using various methods to achieve a better dispersion of the active component.CO oxidation was selected as a probe reaction to examine the catalytic performance.It was found that Pd/TiO2 catalyst prepared using palladium(II) acetate as a precursor exhibited high catalytic activity for CO oxidation at room temperature,which activity is much higher than those on Pd/SiO2 and Pd/Al2O3 catalysts.In-situ Fourier transform infrared ... |
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| Keywords: | CO catalytic oxidation palladium supported catalysts in-situ spectroscopy |
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