Control of strong metal-support interactions in catalysts made of colloidally prepared metal nanoparticles and transition metal oxides

由胶体制备的金属纳米颗粒和过渡金属氧化物制成的催化剂中强金属-载体相互作用的控制

• 批准号: 120339585
• 负责人: Privatdozent Dr. Holger Borchert
• 金额: --
• 依托单位: Institut für Angewandte und Physikalische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/120339585?language=en
• 关键词: Control; strong; metal; support; interactions

The colloidal preparation of metal nanocrystals enables a high degree of control over structural properties such as the particle size and shape by using organic ligands in the synthesis. The structure control opens the possibility to realize supported catalysts with highly defined properties for heterogeneous catalysis. In the framework of the funded project entitled 'Supported Catalysts Based on Colloidally Prepared Metal Nanoparticles: Reaction Control by Structure Control' (German title: 'Trägerkatalysatoren auf Basis kolloidal hergestellter Metallnanopartikel: Reaktionskontrolle durch Strukturkontrolle'), colloidally prepared Pt-based nanocrystals were examined with respect to their application potential in heterogeneous gas phase catalysis in selected test reactions, with the focus on the hydrogenation of organic compounds. It was successfully demonstrated that the preparation of defined bimetallic nanoparticles as well as the usage of organic ligands are indeed suitable strategies to influence in a positive manner on the activity and selectivity of supported metal nanoparticles. Emerging from those results, the intention of the proposed prolongation project is to use the colloidal chemistry approach now to develop model systems suitable to investigate strong metal-support interactions (SMSI effects). The aim is to create model systems situated between highly defined model catalysts under vacuum conditions on the one hand, and real catalysts on the other hand. Concerning the materials, mono- and bimetallic Pt-based model catalysts shall be realized. Thereby, the nature of the contact between the metallic and oxidic components will be systematically varied. The materials will be characterized in detail and investigated as catalysts for CO oxidation and the preferential oxidation of CO in the presence of hydrogen (CO PROX). Considering these test reactions, it is possible to cover a broad range of more oxidative or reductive reaction conditions, which may significantly influence on the occurrence of SMSI effects.

通过在合成中使用有机配体，金属纳米晶体的胶体制备能够高度控制结构性质，例如颗粒尺寸和形状。结构控制打开了实现具有高度限定的多相催化性能的负载型催化剂的可能性。在资助项目“基于胶体制备金属纳米颗粒的负载型催化剂：通过结构控制进行反应控制”的框架内，（德文标题：'Trägerkatalysatoren auf Basis kolloidal hergestellter Metallnanopartikel：通过“Strukturcontrolle”反应控制，在选择的测试反应中，检查胶体制备的Pt基纳米晶体在非均相气相催化中的应用潜力，重点在于有机化合物的氢化。它成功地证明，确定的纳米粒子的制备以及有机配体的使用确实是合适的策略，以积极的方式对负载的金属纳米粒子的活性和选择性的影响。从这些结果中出现的，拟议的延长项目的意图是使用胶体化学的方法，现在开发模型系统适合调查强金属支持相互作用（SMSI效应）。目的是创建位于一方面在真空条件下高度限定的模型催化剂和另一方面在真实的催化剂之间的模型系统。关于材料，应实现单Pt基和双Pt基模型催化剂。因此，金属组分和氧化组分之间的接触性质将系统地变化。这些材料将被详细表征和研究作为CO氧化催化剂和在氢气存在下CO的优先氧化（CO PROX）。考虑到这些测试反应，有可能涵盖更广泛的氧化或还原反应条件，这可能会显着影响SMSI效应的发生。

项目成果

Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts

• DOI: 10.1016/j.jcat.2019.07.049
• 发表时间: 2019-09-01
• 期刊: JOURNAL OF CATALYSIS
• 影响因子: 7.3
• 作者: Neumann, Sarah;Gutmann, Torsten;Kunz, Sebastian
• 通讯作者: Kunz, Sebastian

Control of crystallographic phases and surface characterization of intermetallic platinum tin nanoparticles

金属间铂锡纳米颗粒的晶相控制和表面表征

• DOI: 10.1039/c9ce00356h
• 发表时间: 2019
• 期刊: CrystEngComm
• 影响因子: 3.1
• 作者: A. Erdt;C. Gutsche;U. E. A. Fittschen;H. Borchert;J. Parisi;J. Kolny-Olesiak
• 通讯作者: J. Kolny-Olesiak

Phase Controlled Intermetallic Platinum tin Nanoparticles in Seeded Growth Synthesis for Catalytic Applications

用于催化应用的晶种生长合成中的相控金属间铂锡纳米颗粒

• DOI: 10.1109/nano.2018.8626388
• 发表时间: 2018
• 期刊: 2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO)
• 作者: A. Erdt;C. Gutsche;J. Parisi;H. Borchert;J. Kolny-Olesiak
• 通讯作者: J. Kolny-Olesiak