BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Vancouver BEGIN:DAYLIGHT DTSTART:20220313T030000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:PDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20211107T010000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20211127T234605Z UID:BA2428B2-7B87-48E1-B263-9E9553FB8862 DTSTART;TZID=America/Vancouver:20211124T120000 DTEND;TZID=America/Vancouver:20211124T130000 DESCRIPTION:Green hydrogen produced by splitting water molecules into hydro gen and oxygen using renewable\nsources is expected to play a major role i n the transition to carbon neutral economy\, serving as an\nenergy carrier that can facilitate the penetration of an higher share of intermittent re newable energy\,\nthe decarburization of hard-to-abate industrial sectors (e.g. industrial processes which require high-\ngrade heating or rely on h ydrogen as a feedstock) and the cross-sectorial coupling (linking power\, gas\nand other energy vectors or energy intensive commodities and replacin g them in their respective\nusages). The baseline technology for green hyd rogen production is called water electrolysis\, where\nrenewable power is applied to break the chemical bonds in water molecules and produce hydroge n and\noxygen simultaneously at two electrodes\, cathode and anode\, in al kaline or acidic solution. The coupled\ngeneration of hydrogen and oxygen at the same time in the same cell presents a safety risk\, since the\nmixt ure of the two is highly flammable. Therefore\, a membrane and sealing are used to isolate the\nelectrodes from each other\, which complicates cell construction and requires maintenance\, both\nincreasing the production co st of green hydrogen. In addition\, severe (20-30%) energy losses\, mostly \ndue to the difficult reaction that evolves oxygen\, increase the cost of energy in this energy intensive\ntechnology. These drawback present chall enges for wide scale adoption of green hydrogen.\nIn order to overcome the se challenges\, we develop an alternative technology that decouples the\ng eneration of hydrogen and oxygen into two stages\, separated by time\, or two cells\, space separated\,\navoiding the need for membrane and sealing. In addition\, we divide the oxygen evolution reaction\, a\ndifficult elec trochemical reaction that requires four electrons to generate an oxygen mo lecule on an\natomic reaction site\, into two sub-reactions that occur on four sites instead of one\, thereby enabling\neasier reactions and saving most of the losses in water electrolysis. An ultrahigh efficiency of nearl y 99%\nwas demonstrated at lab scale\, and we expect reaching 95% at syste m scale. To bring this\ntransformative concept to reality we established H 2 Pro\, and Israeli company that aims to provide green\nhydrogen at scale based on our innovation.\n\nSpeaker(s): Prof. Avner Rothschild\, \n\nBell evue\, Washington\, United States\, Virtual: https://events.vtools.ieee.or g/m/287954 LOCATION:Bellevue\, Washington\, United States\, Virtual: https://events.vt ools.ieee.org/m/287954 ORGANIZER:anewton@ieee.org SEQUENCE:3 SUMMARY:Decoupled Water Splitting for Green Hydrogen Production at Scale URL;VALUE=URI:https://events.vtools.ieee.org/m/287954 X-ALT-DESC:Description: <br /><p>Green hydrogen produced by splitting water molecules into hydrogen and oxygen using renewable<br />sources is expect ed to play a major role in the transition to carbon neutral economy\, serv ing as an<br />energy carrier that can facilitate the penetration of an hi gher share of intermittent renewable energy\,<br />the decarburization of hard-to-abate industrial sectors (e.g. industrial processes which require high-<br />grade heating or rely on hydrogen as a feedstock) and the cross -sectorial coupling (linking power\, gas<br />and other energy vectors or energy intensive commodities and replacing them in their respective<br />u sages). The baseline technology for green hydrogen production is called wa ter electrolysis\, where<br />renewable power is applied to break the chem ical bonds in water molecules and produce hydrogen and<br />oxygen simulta neously at two electrodes\, cathode and anode\, in alkaline or acidic solu tion. The coupled<br />generation of hydrogen and oxygen at the same time in the same cell presents a safety risk\, since the<br />mixture of the tw o is highly flammable. Therefore\, a membrane and sealing are used to isol ate the<br />electrodes from each other\, which complicates cell construct ion and requires maintenance\, both<br />increasing the production cost of green hydrogen. In addition\, severe (20-30%) energy losses\, mostly<br / >due to the difficult reaction that evolves oxygen\, increase the cost of energy in this energy intensive<br />technology. These drawback present ch allenges for wide scale adoption of green hydrogen.<br />In order to overc ome these challenges\, we develop an alternative technology that decouples the<br />generation of hydrogen and oxygen into two stages\, separated by time\, or two cells\, space separated\,<br />avoiding the need for membra ne and sealing. In addition\, we divide the oxygen evolution reaction\, a< br />difficult electrochemical reaction that requires four electrons to ge nerate an oxygen molecule on an<br />atomic reaction site\, into two sub-r eactions that occur on four sites instead of one\, thereby enabling<br />e asier reactions and saving most of the losses in water electrolysis. An ul trahigh efficiency of nearly 99%<br />was demonstrated at lab scale\, and we expect reaching 95% at system scale. To bring this<br />transformative concept to reality we established H 2 Pro\, and Israeli company that aims to provide green<br />hydrogen at scale based on our innovation.</p> END:VEVENT END:VCALENDAR