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UID:20250928T084106EDT-0939UreC5t@132.216.98.100
DTSTAMP:20250928T124106Z
DESCRIPTION:In natural photosynthesis\, light is used for the production of
  chemical energy carriers to fuel biological activity. This sustainable pr
 ocess requires the finely tuned combination of light absorption\, charge s
 eparation and chemical catalysis\, which is well evolved\, but shows an ov
 erall poor efficiency for fuel synthesis. This presentation will summarise
  our progress in re-engineering photosynthetic pathways to provide inspira
 tion for solar fuel production and to gain insights for understanding the 
 process itself.\n\nTowards this goal\, we are developing protein film phot
 oelectrochemistry as a technique to study the light-dependent activity of 
 the water oxidation enzyme Photosystem II adsorbed onto an electrode surfa
 ce to be studied.1 In particular\, we have established the excellent integ
 ration of Photosystem II from Thermosynechococcus elongatus on nanostructu
 red and hierarchical inverse opal indium-tin oxide (ITO) electrodes for re
 d light driven water oxidation to O2.2-4 In these studies\, protein film p
 hotoelectrochemistry was shown to provide us with valuable insights into t
 he activity\, stability\, quantum yields\, and interfacial electron transf
 er pathways of Photosystem II. Most recently\, we succeeded in assembling 
 an efficient enzyme-based full water splitting cell driven by light throug
 h the rational wiring of Photosystem II to a [NiFeSe]-hydrogenase from Des
 ulfomicrobium baculatum.4 This hydrogenase displays a combination of uniqu
 e properties for application in water splitting such as good H2 evolution 
 activity\, little product (H2) inhibition and some tolerance towards O2.5\
 ,6 These features combined make this enzyme\, arguably\, the most efficien
 t molecular H2 evolution catalyst for use in water splitting.7 The semi-ar
 tificial water splitting cell shows how we can harvest and utilise electro
 ns generated during water oxidation at Photosystem II electrodes for the g
 eneration of renewable H2 with a wired hydrogenase through a direct pathwa
 y unavailable to biology.\n\n \n\nReferences:\n\n1) Kato\, Zhang\, Paul & 
 Reisner Chem. Soc. Rev.\, 2014\, 43\, 6485–6497.\n\n2) Kato\, Cardona\, Ru
 therford & Reisner J. Am. Chem. Soc.\, 2012\, 134\, 8332–8335.\n\n3) Kato\
 , Cardona\, Rutherford & Reisner J. Am. Chem. Soc.\, 2013\, 135\, 10610–10
 613.\n\n4) Mersch\, Lee\, Zhang\, Brinkert\, Fontecilla-Camps\, Rutherford
  & Reisner J. Am. Chem. Soc.\, 2015\, 137\,\n\n8541–8549.\n\n5) Sakai\, Me
 rsch & Reisner\, Angew. Chem. Int. Ed.\, 2013\, 52\, 12313–12316.\n\n6) Ca
 puto\, Gross\, Lau\, Cavazza\, Lotsch & Reisner Angew. Chem. Int. Ed.\, 20
 14\, 53\, 11538–11542.\n\n7) Wombwell\, Caputo & Reisner Acc. Chem. Res.\,
  2015\, DOI: 10.1021/acs.accounts.5b00326.\n
DTSTART:20151123T193000Z
DTEND:20151123T210000Z
LOCATION:Ruttan Room\, Rm 321\, Maass Chemistry Building\, CA\, QC\, Montre
 al\, H3A 0B8\, 801 rue Sherbrooke Ouest
SUMMARY:Departmental Seminar: Dr. Erwin Reisner - Re-wiring Photosynthesis 
 for Efficient Solar Water Splitting
URL:/chemistry/channels/event/departmental-seminar-dr-
 erwin-reisner-re-wiring-photosynthesis-efficient-solar-water-splitting-256
 907
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