Dynamic catalysts for the production of clean energy

用于生产清洁能源的动态催化剂

• 批准号: 431423888
• 负责人: Professor Dr. Jan-Dierk Grunwaldt
• 金额: --
• 依托单位: Institut de recherches sur la catalyse et lenvironnement de Lyon (IRCELYON)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/431423888?language=en
• 关键词: Dynamic; catalysts; production; clean; energy

The DYCAT research project aims to investigate the interaction between a catalytically active metal (Pt and Pd) and CeO2, used as a support. We have recently found that the structure and electronic properties of platinum can be optimized by applying a suitable catalyst pretreatment based on short-term alternating reducing/oxidizing sequences at mild temperatures. This concept of “dynamic catalysts” can tailor and stabilize efficient nanoparticles for catalysis. The DYCAT project objective is to unravel and transfer this innovative concept to further key catalytic reactions in energy production, such as the water-gas shift reaction for H2 production and the clean catalytic combustion of CH4. For developing highly active catalysts, mainly the CeO2 surface properties and its interaction with Pt and Pd will be considered. The scientific approach is based on the coupling between advanced in-situ/operando characterization techniques, kinetics/catalytic performance and theoretical modelling. Synchrotron based techniques with high time and spatial resolutions like X-ray absorption / emission spectroscopy (XAS, ME-XAS, HERFD-XANES or V2C-XES) will be used to access information on the electronic state, local coordination environment, interaction with reactants and noble metal particle size variation under applied reaction conditions. Complementary information on the dynamic variations of active sites at the nanoscale will be obtained on a new generation of Environmental Transmission Electron Microscope (aberration-corrected) with a high temporal resolution. The synergy between these two families of characterization methods is essential, very innovative, and a clear added value to the Franco-German collaboration. Furthermore, the coupling of these cutting-edge methods with systematic catalytic tests and theoretical calculations is expected to significantly improve the fundamental understanding of the noble metal/ceria interface dynamic behaviour, which is the prerequisite for operando shaping efficient catalysts for WGS and CH4 oxidation reactions.

DYCAT研究项目旨在研究催化活性金属（Pt和Pd）与用作载体的CeO 2之间的相互作用。我们最近发现，铂的结构和电子性质可以通过应用合适的催化剂预处理的基础上，在温和的温度下短期交替还原/氧化序列进行优化。这种“动态催化剂”的概念可以定制和稳定高效的纳米颗粒用于催化。DYCAT项目的目标是将这一创新概念转化为能源生产中的进一步关键催化反应，例如用于生产H2的水煤气变换反应和CH 4的清洁催化燃烧。为了开发高活性催化剂，主要考虑CeO 2表面性质及其与Pt和Pd的相互作用。科学方法是基于先进的原位/操作表征技术，动力学/催化性能和理论建模之间的耦合。基于同步加速器的技术具有高时间和空间分辨率，如X射线吸收/发射光谱（XAS，ME-XAS，HERFD-XANES或V2 C-XES）将用于访问电子状态，局部配位环境，与反应物的相互作用以及在应用的反应条件下贵金属粒度变化的信息。在纳米级的活性位点的动态变化的补充信息将获得新一代的环境透射电子显微镜（像差校正）具有高的时间分辨率。这两种表征方法之间的协同作用是必不可少的，非常具有创新性，并为法德合作带来了明显的附加值。此外，这些尖端的方法与系统的催化测试和理论计算的耦合，预计显着提高贵金属/氧化铈界面的动态行为，这是操作性成型有效的催化剂的WGS和CH 4氧化反应的先决条件的基本理解。