hecck reaction and electrocatalytic reduction of co2.ppt
TRANSCRIPT
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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