厦门大学学报（自然科学版）2011，Vol.50Issue(1)：65-69,5.
高分散负载Pd催化剂上CO氧化性能
CO Oxidation over Highly Dispersive Supported Palladium Catalysts
摘要
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 spectroscopy (FT-IR) reveals that CO can react with surface lattice oxygen of TiO2 to form CO2 in the absence of gas O2 on the Pd/TiO2 catalyst. Comparative studies using BET, O2-chemisorption, in-situ FT-IR of CO adsorption and temperature programmed reduction (H2-TPR) techniques were carried out in order to elucidate the relationship between the structure and activity for CO oxidation at low temperature. Metallic Pd was found to be highly dispersed on TiO2 and Al2O3 support surfaces. A relatively high temperature reduction peak observed in H2-TPR suggests a strong interaction between Pd and the TiO2 support. The origins of the high activity for CO oxidation on Pd/TiO2 at near room temperature may come from the highly dispersive Pd and the strong interacrion between Pd and support.关键词
CO催化氧化/钯/负载型催化剂/原位谱学表征分类
化学化工引用本文复制引用
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):65-69,5.基金项目
国家自然科学基金资助项目(20873109,21073149) （20873109,21073149）
科技部973项目(2010CB732303) （2010CB732303）
教育部科学技术研究重大项目(309019) （309019）
教育部博士点基金(200803841011) （200803841011）
福建省自然科学基金资助项目(2008J0168) （2008J0168）
