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SUMMARY:IGM Colloquium: Photo-electrochemical Synthesis of Fuels
DTSTART:20171114T121500
DTEND:20171114T131500
DTSTAMP:20260506T205543Z
UID:ab1be71c7298adc2d596f9984629f112f12647a6514c8b014e8715ae
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Geoff Kelsall\nGlobal (mean) power demands of ca. 2×101
 3 W could be provided from the earth’s ultimate power source\, ca. 1.2×
 1017 W of incident solar radiation\, if adequately efficient\, durable and
  economic transducers are developed. However\, the diurnality of solar pow
 er requires such transducers to be coupled to energy storage\, potentially
  enabling decarbonising power sources\, managing intermittency of renewabl
 e power sources and smoothing the dynamics of electrical power demands. Th
 is can be achieved if electrons from photovoltaics are used to electrolyse
  water to form (oxygen and) hydrogen\, which can be oxidised subsequently 
 in fuel cells. Alternatively\, solar power (ca. 100 - 300 W m-2) can be us
 ed directly\, and potentially more cheaply\, for photo-electrochemical red
 uction (and oxidation) of water in an environmentally benign route to hydr
 ogen (and oxygen). Hence\, extremely large areas of efficient\, cheap\, en
 vironmentally-benign\, easily fabricated absorbing materials and devices w
 ould need to be deployed to harvest solar power\, to displace CO2-emitting
  fossil fuels and to contribute significantly to meeting global power dema
 nds. Photo-electrochemical reactors incorporating semiconducting photo-ele
 ctrodes will be described\, as such systems offer one possible solution.\n
 \nBio:\nGeoff Kelsall has been Professor of Electrochemical Engineering at
  Imperial College London since 1994\, except during 1998-2000\, when he he
 ld the Chair in Electrometallurgy\, University of British Columbia\, Canad
 a. His research projects involve the conception\, modelling\, design\, per
 formance characterisation and optimisation of novel reactors for electroly
 tic processes\, high temperature fuel cells / electrolysers and prospectiv
 e photo-electrochemical processes for harvesting and storing solar energy 
 as hydrogen and other fuels.\n\n 
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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