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DTSTAMP:20260414T181816
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URL:https://murmitoyen.com/events/vanille/udem/detail/582499
LOCATION:Polytechnique Montréal - Pavillon J.-Armand-Bombardier\, 5155\, a
 venue Decelles\, Montréal\, QC\, Canada\, H3T 2B1
SUMMARY:Four Decades of Heterogeneous Photocatalysis – Where are the much
  promised Solar Fuels? – Nick Serpone\, University of Pavia
DESCRIPTION:Nick Serpone\, University of Pavia\, Dept. of Chemistry viale T
 aramelli\, 12\, 27100 Pavia\, ItalyThe two oil crises of the 1970s led to 
 the search for renewable energy sources\, with water splitting as the prin
 cipal source of H2 subsequent to a short article by Fujishima and Honda (N
 ature\, 1972) that started a frenzy research activity\, which was to begin
  the Hydrogen Economy. The use of water as the source of a fuel was predic
 ted nearly 140 years ago by Jules Verne (The Mysterious Island\, 1874) and
  later implicitly stated by Giacomo Ciamician (1912).  Unfortunately\, th
 e Hydrogen Economy never panned out. Though many strategies have been prop
 osed and some experimented with\, it became clear that a process occurring
  in heterogeneous media might achieve the desired results through the inte
 rmediacy of semiconductor-based photocatalysts. Studies of Heterogeneous P
 hotocatalysis toward environmental remediation and in the generation of us
 eful fuels from the reduction of H2O (to hydrogen) and CO2 (to methanol\, 
 CO\, and/or methane) have been carried out largely in the last four decade
 s\, in which it was deduced that separation of the photogenerated charge c
 arriers (electrons and holes) was an important critical component of any s
 uccessful attempt at the destruction of pollutants and in the production o
 f solar fuels. Although water splitting has been achieved in some cases\, 
 the quantity of H2 produced remains disappointingly low\, even when a sacr
 ificial electron donor (hole scavenger) is involved in the process. Result
 s from the literature and from the patent literature (# of patents about 1
 2-13% of the literature) will be presented. Quantitative data about the am
 ount of hydrogen evolved or carbon-based fuels produced will be indicated 
 whenever available. Even though results are disappointing\, much has been 
 learned in new nanomaterials. The Holy Grail photocatalysts to achieve sig
 nificant water splitting and reduction of the Greenhouse gas\, carbon diox
 ide\, have yet to be found. Le café est servi à partir de 11h20.Voici l
 e lien vers la page web du groupe de recherche du Pr SerponeCette confé
 rence est présentée par le RQMP Versant Nord du Département de physiqu
 e de l'Université de Montréal et le Département de génie physique d
 e Polytechnique Montréal.
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