hecck reaction and electrocatalytic reduction of co2.ppt

8/18/2019 Hecck Reaction and Electrocatalytic reduction of CO2.ppt

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The Heck Reaction

• The Heck reaction is a versatile method for the coupling sp2

hybridised centres.


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• -Hydride elimination is reversibleβ

• This alkenes can ‘walk’ or migrate to give the most stable alkene

• Only restriction is every step must be syn


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Mechanism of the SuzukiCoupling Reaction

Oxidative addition: Pd (0) to Pd (II):


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• Increase of CO2 one of the causes of greenhouse eect and global warming issues.

• Electro-catalytic reduction of CO2 to liquid fuels.

• Carbon balance by recycling into usable fuels.


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Catalytic Power (history)

• Jöns Jakob Berzelius (1835, Swedish chemist)

• Wilhelm Ostwald (1909 Nobel Prize in Chemistry)•20th Century


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• Rate of Reaction

• Pathway

• Activation Energy(Ea)

• Equilibrium

Catalyst


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Water Gas Shift Reaction

(WGSR)

CO2 + H2 = H2O + CO


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CO R d ti


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CO2 Reduction

• Catalytic Hydrogenation

• Complex Metal Hydrides

• Electrochemical Reduction• Photocatalysis

• Biological reduction

- Carbon Monoxide DeHydrogenase: CODH

Chiang et al Inorg. Chem.! 2""#! 44! $""%&$"' * Che ,duc! '$#-! .#

($)! //&//$


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0iO2 fils 1oS2 flaes

Electrode materials


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Photocatalysis

3 4 Parinson! P 5 Wea6er! 7ature! '$-/! ."$! '/-&'/$


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Increasing interest in the industrial and academic

communities.

A a! to use a harm"ul greenhouse gas "or s!nthesis o"

industrial com#ounds ($H%& $O& $H'O& !ngas)

Puri"ication and concentration o" $O' "rom the atmos#here

to use the harm"ul levels o" this greenhouse gas "or energ!

storage .

$ontinue the a##roach to local #roton sources on chelate

ligands and mimicking naturall! occurring catal!tics!stems.

A##lication o" a solar cell to #oer catal!sis& and

ti " d t

hecck reaction and electrocatalytic reduction of co2.ppt

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