CeO_2修饰介孔TiO_2和ZrO_2负载金催化剂催化废气中CO和挥发性有机化合物降解(英文)  

Catalytic abatement of CO and volatile organic compounds in waste gases by gold catalysts supported on ceria-modified mesoporous titania and zirconia

作　　者：Vasko Idakiev Dimitar Dimitrov Tatyana Tabakova Krasimir Ivanov Zhong-Yong Yuan Bao-Lian Su 

机构地区：[1]Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria [2]Department of Chemistry, Agricultural University, 4000 Plovdiv, Bulgaria [3]Institute of New Catalytic Materials Science, College of Chemistry, Nankai University, Tianjin 300071, China [4]Laboratory of Inorganic Materials Chemistry, University ofNamur (FUNDP), 61 rue de Bruxelles, B5000, Namur, Belgium

出　　处：《催化学报》2015年第4期579-587,共9页

基　　金：the financial support by the Bulgarian National Science Fund (Project FNI T02/4);the National Science Fund of Bulgaria for a financial support through Project E-01/07 2012

摘　　要：Mesoporous 氧化物 TiO ₂ 和 ZrO ₂, 经由中立 C ₁₃(EO)₆&ndash;Zr(OC<sub>3</sub 由表面活化剂 templating 综合了 > H ₇)₄ 集会小径，和 deposition&ndash;precipitation (DP ) 准备的修改 ceria 的 TiO ₂ 和 ZrO ₂, 方法，展示高表面区域和一致毛孔尺寸分布被用作对金催化剂的支持。支持的金催化剂为空气污染物质的催化消退被估计，即，公司， CH <sub>3</sub > 哦，并且(CH ₃)<sub>2</sub > O。金牌被一个 DP 方法在 mesoporous 氧化物上支持。支持和催化剂被粉末 X 光检查衍射，高分辨率的传播电子显微镜学， N ₂ adsorption&ndash;desorption 分析，和规划温度的减小技术描绘。在象由 ceria 的结构、催化的性质的积极修正一样的 ceria 和 mesoporous ZrO ₂ 和 TiO ₂ 之间的 synergistic 相互作用的高度被观察。ceria 添加剂与 mesoporous 氧化物交往并且在支持的 reducibility 上导致强壮的效果。催化剂的催化行为被讨论决定修改在金 nanoparticles 和 ceria-mesoporous 氧化物支持之间的添加剂和可能的相互作用的 ceria 的角色。在修改 ceria 的 mesoporous ZrO ₂ 上支持的金催化剂显示了优异催化活动(在 10 &deg;C 和 CH <sub>3</sub 的公司的 &sim;100% 变换 > 在 60 &deg;C 的 OH ) 。高催化的活动能被归因于支持的能力帮助氧空缺形成。研究显示修改 ceria 的 mesoporous 氧化物支持作为对基于黄金的催化剂的支持有潜力。Mesoporous oxides TiO2 and ZrO2, synthesized by surfactant templating via a neutral C13（EO）6–Zr（OC3H7）4 assembly pathway, and ceria-modified TiO2 and ZrO2, prepared by a deposi-tion–precipitation（DP） method, featuring high surface areas and uniform pore size distributions were used as supports for gold catalysts. The supported gold catalysts were assessed for the cata-lytic abatement of air pollutants, i.e., CO, CH3OH, and（CH3）2O. The gold was supported on the mes-oporous oxides by a DP method. The supports and catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, N2 adsorption–desorption analysis, and temperature-programmed reduction technique. A high degree of synergistic interaction be-tween ceria and mesoporous ZrO2 and TiO2 as well as a positive modification of the structural and catalytic properties by ceria was observed. The ceria additive interacts with the mesoporous oxides and induces a strong effect on the reducibility of the supports. The catalytic behavior of the catalysts was discussed to determine the role of the ceria modifying additive and possible interaction be-tween the gold nanoparticles and ceria-mesoporous oxide supports. The gold catalysts supported on ceria-modified mesoporous ZrO2 displayed superior catalytic activity（~100% conversion of CO at 10 ℃ and CH3OH at 60 ℃）. The high catalytic activity can be attributed to the ability of the sup-port to assist oxygen vacancies formation. The studies indicate that the ceria-modified mesoporous oxide supports have potential as supports for gold-based catalysts.

关 键 词：介孔二氧化钛 改性添加剂 二氧化铈 金催化剂 挥发性有机化合物 氧化锆 CO 支撑 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学]