Gold in Three-way Catalysis

三元催化中的黄金

• 批准号: 246295757
• 负责人: Professor Dr. Wolfgang Grünert
• 金额: --
• 依托单位: Lehrstuhl für Technische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/246295757?language=en
• 关键词: Gold; Three; way; Catalysis

In the first stage of the present project on Au-containing three-way catalysts, a drastic dependence of the catalytic behavior of bimetallic Pd-Au systems on the nature of the support was found. When supported on La-doped alumina, gold acts as a poison with respect to the Pd component and even enhances the adverse property of Pd to release nitrous oxide at elevated temperatures. When supported on CeZrO2, properties of Pd and Au combine favorably, so that Au-containing three-way catalysts may become a reality provided that thermal stability requirements can be fulfilled. The project aims at elucidating the origin of these differences by structural characterization of relevant materials (e.g. by XPS, XAFS, LEIS, HAADF-STEM), but also by operando XAFS studies in model exhausts of different composition, at investigating the catalytic behavior of the bimetallic catalysts after thermal stress and its structural reasons, and if necessary at identifying strategies for stabilization of the catalysts under high temperatures.

在当前含金三效催化剂项目的第一阶段中，发现双金属Pd-Au体系的催化行为对载体性质的极大依赖性。当负载在La掺杂的氧化铝上时，金对于Pd组分起到毒物的作用，甚至增强Pd在高温下释放一氧化二氮的不利性能。当负载在CeZrO2上时，Pd和Au的性能有利地结合在一起，使得在满足热稳定性要求的情况下含Au三元催化剂可能成为现实。该项目旨在通过相关材料的结构表征（例如通过 XPS、XAFS、LEIS、HAADF-STEM）来阐明这些差异的根源，同时还通过对不同成分的模型废气进行操作性 XAFS 研究，研究热应力后的双金属催化剂及其结构原因，并在必要时确定高温下催化剂的稳定策略。

项目成果

Studies on three-way catalysis with supported gold catalysts. Influence of support and water content in feed

• DOI: 10.1016/j.apcatb.2016.10.017
• 发表时间: 2017-04
• 期刊: Applied Catalysis B-environmental
• 影响因子: 22.1
• 作者: V. Ulrich;B. Moroz;I. Sinev;Pavel Pyriaev;V. Bukhtiyarov;W. Grünert

Three-way catalysis with supported gold catalysts: Poisoning effects of hydrocarbons

• DOI: 10.1016/j.apcatb.2018.06.063
• 发表时间: 2018-12
• 期刊: Applied Catalysis B: Environmental
• 作者: V. Ulrich;Christian Froese;B. Moroz;P. Pyrjaev;E. Gerasimov;I. Sinev;B. Cuenya;M. Muhler;V. Bukhtiyarov;W. Grünert