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Eigenstate Resolved Reactivity In Gas - Surface Reactions

English title Eigenstate Resolved Reactivity In Gas - Surface Reactions
Applicant Beck Rainer
Number 115972
Funding scheme Project funding (Div. I-III)
Research institution Institut des sciences et ingénierie chimiques EPFL - SB - ISIC
Institution of higher education EPF Lausanne - EPFL
Main discipline Physical Chemistry
Start/End 01.04.2007 - 31.03.2009
Approved amount 208'775.00
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Keywords (14)

GAS - SURFACE REACTION; DISSOCIATIVE CHEMISORPTION; CATALYSIS; QUANTUM STATE RESOLVED REACTIVITY MEASUREMENTS; vibrationally enhanced reaction rates; thin film deposition; vibrational excitation; surface reactions; physisorption; chemisorption; state-resolved surface reactivity; state resolved reactivity; mode specificity; molecular beams

Lay Summary (English)

Lay summary
The project studies the microscopic details of chemical reactions between molecules in gas phase and solid surfaces. Such gas-surface reactions form the basis of heterogeneous catalysis, a process of tremendous importance for the industrial synthesis of almost all chemicals needed by our society. We use laser radiation and molecular beams to experimentally control as many variables of the gas-surface reaction process as possible to perform reactivity measurements under very well defined conditions. The molecular beam gives the reagent molecules a well defined velocity and direction of incidence towards the surface and the laser radiation allow us to prepare the incident molecules in a specific vibrational and rotational state. We then measure the reactivity of the molecules for each individual quantum states rather than what is commonly done for reaction rate measurements under thermal equilibrium for a large distribution of velocities and rotational and vibrational states. The results of our measurements can be used for specific and accurate tests of theoretical models for gas-surface reactions. The combined goal of these highly specific experiments in conjunction with advanced theory is to develop a detailed understanding of the fundamental reaction steps which take place on a catalyst surface. Such knowledge is critical for the systematic development of better catalysts and has the potential for great economic and ecological benefits.

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Direct link to Lay Summary Last update: 21.02.2013

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Associated projects

Number Title Start Funding scheme
124666 Quantum State Resolved Surface Reaction Dynamics 01.04.2009 Project funding (Div. I-III)
121307 Reflection absorption infrared spectroscopy (RAIRS) to study vibrationally activated chemisorption 01.04.2009 R'EQUIP
107424 Eigenstate Resolved Reactivity In Gas - Surface Reactions 01.04.2005 Project funding (Div. I-III)