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SUMMARY:MechE Colloquium: Interfacing nature’s catalytic machinery with 
 synthetic materials for semi-artificial photosynthesis
DTSTART:20190312T121500
DTEND:20190312T131500
DTSTAMP:20260407T100410Z
UID:66e0e1349436864df983ba2e51c9aaf8563f35171aa94fdcdebcc249
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Erwin Reisner\, Department of Chemistry at University of
  Cambridge\nSemi-artificial photosynthesis interfaces biological catalysts
  with synthetic materials and aims to overcome the limitations of natural 
 and artificial photosynthesis. (1) It also provides an underexplored strat
 egy to study the functionality of biological catalysts on synthetic scaffo
 lds through a range of techniques. This presentation will summarise our pr
 ogress in integrating biocatalysts in bespoke hierarchical 3D electrode sc
 affolds and photoelectrochemical circuits. (2) We will first discuss the f
 undamental insights gained into the function of the water oxidation Photos
 ystem II\, where (i) unnatural charge transfer pathways have been revealed
  at the enzyme-electrode interface\, and (ii) O2 reduction that short-circ
 uit the water-oxidation process has been discovered. (3-4)\nThe wiring of 
 Photosystem II to a H2 evolving hydrogenase or a CO2 reducing formate dehy
 drogenase has subsequently enabled the in vitro re-engineering of natural 
 photosynthetic pathways. We have assembled efficient H2 evolution and CO2 
 reduction systems that are driven by enzymatic water oxidation using semi-
 artificial Z-scheme architectures. (5-8) In contrast to natural photosynth
 esis\, these photoelectrochemical cells allow panchromic light absorption 
 by using complementary biotic and abiotic light absorbers. As opposed to l
 ow-yielding metabolic pathways\, the electrochemical circuit provides effe
 ctive electronic communication without losses to competing side-reactions.
  Progress in the integration of robust live cyanobacteria in 3D structured
  electrodes will also be discussed. (9)\n\nReferences\n(1) Kornienko et al
 .\, Nature Nanotech.\, 2018\, 13\, 890–899\n(2) Mersch et al.\, J. Am. C
 hem. Soc.\, 2015\, 137\, 8541–8549\n(3) Zhang et al.\, Nature Chem. Biol
 .\, 2016\, 12\, 1046–1052\n(4) Kornienko et al.\, J. Am. Chem. Soc.\, 20
 18\, 140\, 17923–17931\n(5) Sokol et al.\, Nature Energy\, 2018\, 3\, 94
 4–951\n(6) Nam et al.\, Angew. Chem. Int. Ed.\, 2018\, 57\, 10595–1059
 9\n(7) Sokol et al.\, J. Am. Chem. Soc.\, 2018\, 140\, 16418–16422\n(8) 
 Miller et al.\, Angew. Chem. Int. Ed.\, 2019\, in press (DOI: 10.1002/anie
 .201814419)\n(9) Zhang et al.\, J. Am. Chem. Soc.\, 2018\, 140\, 6–9\n 
 \nBio:\nErwin Reisner received his education and professional training at 
 the University of Vienna (PhD in 2005 and Habilitation in 2010)\, the Mass
 achusetts Institute of Technology (postdoc from 2005-2007) and the Univers
 ity of Oxford (postdoc from 2008-2009). He joined the University of Cambri
 dge as a University Lecturer in the Department of Chemistry and as a Fello
 w of St. John’s College in 2010. He became the head of the Christian Dop
 pler Laboratory for Sustainable SynGas Chemistry in 2012\, was appointed t
 o Reader in 2015\, and his current position as Professor of Energy and Sus
 tainability in 2017. His laboratory explores chemical biology\, synthetic 
 chemistry\, materials science\, and engineering relevant to the developmen
 t of solar-driven processes for the sustainable synthesis of fuels and che
 micals. He acts as the Principal Investigator of the Cambridge Centre for 
 Circular Economy Approaches to Eliminate Plastic Waste and director of the
  UK Solar Fuels Network\, where he promotes and coordinates the national a
 ctivities in artificial photosynthesis.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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