Sökning: "IR Spectroscopy"

Visar resultat 36 - 40 av 147 avhandlingar innehållade orden IR Spectroscopy.

1. 36. Selective Catalytic Reduction of NOx with NH3

   Författare :Hanna Maria Sjövall; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ammonia oxidation; Zeolite; Ammonia; IR spectroscopy; SCR; Selective Catalytic Reduction; Nitrogen oxide; NO reduction; Cu-ZSM-5; FTIR;

   Sammanfattning : .... LÄS MER

3. 37. Multivariate Analysis of 2D-NMR Spectroscopy : Applications in wood science and metabolomics

   Författare :Tommy Öman; Mattias Hedenström; Bjart Frode Lutnaes; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 2D NMR; HSQC; cellulose; ligning; STOCSY; HSQC-STOCSY; crystallinity; biologisk kemi; biological chemistry;

   Sammanfattning : Wood is our most important renewable resource. We need better quality and quantity both according to the wood itself and the processes that are using wood as a raw material. Hence, the understanding of the chemical composition of the wood is of high importance. LÄS MER

4. 38. Model catalysts studied by x-rays, visible and infrared light

   Författare :Stefano Albertin; Synkrotronljusfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; High Energy Surface X-ray Diffraction; X-ray Photoelectron Spectroscopy; oxidation; Pd 100 ; PdO; Ir 100 ; IrO2; in-situ; operando; Surface Optical Reflectance;

   Sammanfattning : This work is focused on the study of transition metal model catalysts for gas-phase heterogeneous catalysis, studied with light-based in-situ and operando techniques.Metallic model catalysts, such as Palladium (Pd) and Iridium (Ir) single crystals and in minor part deposited Rhodium (Rh), were studied using a combination of x-ray and non x-ray techniques. LÄS MER

5. 39. Above and Below Graphene: Nanoparticle Chemistry and Interface Reactions

   Författare :Elin Grånäs; Synkrotronljusfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Graphene; Scanning tunneling microscopy; X-ray photoelectron spectroscopy; Adsorption; Nanoparticles; Ir 111 ; Surface science;

   Sammanfattning : The work presented in this dissertation addresses two main topics: (i) graphene supported nanoparticles and their stability upon gas adsorption, and (ii) intercalation of different molecules under graphene and their reactions under graphene. From an interplay of X-ray photoelectron spectroscopy, scanning tunneling microscopy, low energy electron diffraction, and density functional theory an atomic scale understanding of both the nanoparticles and the intercalated structures is obtained. LÄS MER

7. 40. Structure-dependent charge transfer at the interafce between organic thin films, and metals and metal oxides

   Författare :Sareh Ahmadi; Oscar Tjernberg; Guy Le Lay; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photoelectric spectroscopy; X-ray absorption spectroscopy; organic semiconductors; phthalocyanine; charge transfer; electronic structure; dye sensitization;

   Sammanfattning : The purpose of the research work, presented in this thesis is to offer a detailed atomic level study of interfaces created by adsorption of organic molecules on metals and metal oxides to point out significant impact of substrate, dye structure as well as different mediators on the charge transfer at these interfaces, which is proven to influence the device performance to a great extent.Adsorption of organic photosensitive molecules on metals and metal-oxides is the main focus of this thesis. LÄS MER