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.

在含Au三效催化剂研究的第一阶段，我们发现，Pd/Au三元催化剂的催化性能与载体的性质密切相关，当负载在La掺杂的氧化铝上时，金对Pd组分起着毒害作用，甚至增强了Pd在高温下释放一氧化二氮的不利性质。当负载在CeZrO 2上时，Pd和Au的性质有利地联合收割机，使得含Au的三效催化剂可以成为现实，前提是可以满足热稳定性要求。该项目旨在通过相关材料的结构表征来阐明这些差异的起源（例如，通过XPS、XAFS、LEIS、HAADF-STEM），而且还通过在不同组成的模型排气中的操作XAFS研究，来研究在热应力之后催化剂的催化行为及其结构原因，并且如果需要的话，确定在高温下稳定催化剂的策略。

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