Catalysis newton sow
- 1. SELVAMM ARTS SCEINCE COLLEGE (AUTONOMOUS) DEGREE OF MASTER OF SCEIENCE IN PHYSICS Submitted by S.SOUNDARRAJAN CHEMICAL AND CATALYTIIC ASPECTS OF NANOCRYSTALS
- 2. Introduction Chemical properties Surface chemistry process Nanomaterial in catalysis Plane of talk
- 3. Physicist Richard Feynman ,The father of nanotechnology Introduction
- 4. Plenty of Room at the Bottom … But there is plenty of room to make them smaller The idea behind nanotechnology originated with Nobel Laureate Richard Feynman nearly 50 years ago. There is nothing that I can see in the physical law that says the elements cannot be made enormously smaller than they are now. …. Richard Feyman December 29, 1959 The annual meeting of the American Physical Society at Caltech
- 5. Nanotechnology Nano science and nanotechnology are the study and application of extermely small things and can be used across all the other science fields , such as chemistry , physics ,biology , materials science , and engineering. just how small nanotechnology is are nanometer is a 10−9 nm
- 6. 1 m 10 cm 1 cm 100 m 10 m 1 m 100 nm 10 nm
- 7. Surface features Nanocrystal superlattices Diblock copolymers and others including catalysis Chemical properties
- 8. Corrosion Adsorption Oxidation Reduction catalysis Surface chemistry is very importance in numerous process such as
- 9. corrosion
- 12. catalysis
- 13. Nanomaterials in catalysis Metallic nanoparticles exhibit different catalytic activities as follows Electronic effects Support effects Shape effects Recent progress Metal oxides and sulfides
- 15. Electron density charges may be vary due to particle size Ex: Nickel Electronic effects
- 16. Small metal particle bound to a metal oxide surface can be affected electronically by the nature of metal oxide mgo→ 𝑚𝑔 + 𝑜 Support effects
- 17. Shape effects
- 18. Recent progress
- 19. Methanol synthesis over a zno catalysist is well known 𝑐𝑜2+3𝐻2 → 𝐶𝐻3OH+𝐻2 𝑂 metal oxides and sulfides
- 20. THANK YOU