1 / 4

Transition metals catalysts

Transition metals catalysts. Catalysts lower activation energies allowing a chemical reaction to go faster . Heterogenous catalyst: different phase as reactants. Homogenous catalyst: same phase. . Transition metals as catalysts. Transition metals are good catalysts because :

kiril
Télécharger la présentation

Transition metals catalysts

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Transition metals catalysts • Catalysts lower activation energies allowing a chemical reaction to go faster. • Heterogenous catalyst: different phase as reactants. • Homogenous catalyst: same phase.

  2. Transition metals as catalysts Transition metals are good catalysts because: • they have the availability of 3d and 4s electrons and similar successive ionization energies which allow them to change easily between different oxidation states (homogenous catalysis) • have empty orbitalswhich can be used to make temporary bonds (heterogenous catalysts).

  3. Heterogenous catalysis • Nickel in the conversion of alkenes into alkanes. • Iron in the Haber process • Manganese dioxide in the decomposition of hydrogen peroxide. • Palladium and platinum in a catalytic converter. • Cobalt in manufacture of vitamin B12

  4. Homogenous catalysis Overall: S2O82(aq) + 2I- (aq) 2SO42- (aq) + I2(s) Using catalyst Fe3+ 2Fe 3+ (aq) + 2I- (aq) 2Fe2+ (aq) +I2 (s)  2Fe 2+(aq) + S2O82- (aq)  2Fe3+(aq) + 2SO42- (aq)

More Related