BEGIN:VCALENDAR
PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20200310T101042Z
DTSTART:20200312T140000Z
DTEND:20200312T150000Z
SUMMARY:CANCELLED - Seminar entitled "Exploring the impact of carbon stru
 cture in low-temperature hydrogen fuel cells by electron microscopy"
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}ifn-k695vkc
 2-e2ph1h
DESCRIPTION:Graphitized carbons play a critical role in the electrodes of
  polymer electrolyte membrane fuel cells.  As a support material\, they 
 influence the activity and stability of Pt nanoparticles\, \nwhile also 
 impacting the dispersion of proton-conducting ionomer\, the distribution
  of pore space\, and electrical conductivity.  In platinum group metal-f
 ree catalysts\, the role of the \ngraphitized support becomes even more 
 critical\, with graphene-hosted FeNx moeties serving as the active site 
 for the oxygen reduction reaction in this class of materials.  \nThe pre
 sentation will begin with a short summary of activities at ORNL’s Center
  for Nanophase Materials Sciences\, then focus on the scanning transmiss
 ion electron microscopy \n(STEM) methods which have been applied to the 
 study of the various carbon structures used in fuel cells.   The valuabl
 e structure-property insights gained from techniques such as \nsingle at
 om electron energy loss spectroscopy\, 4D STEM\, in situ pyrolysis\, and
  electron tomography will be discussed.  A brief overview of the current
  status of the hydrogen \neconomy in the United States will also be prov
 ided\, as will a perspective of the key challenges that remain for fuel 
 cells and hydrogen production\, storage\, and delivery.  \n\nDave Cullen
  is a Senior Staff Scientist in the Electron and Atom Probe Microscopy G
 roup at Oak Ridge National Laboratory (ORNL).  He earned his Ph.D. in Ma
 terials Science and \nEngineering from Arizona State University and join
 ed ORNL as an Alvin M. Weinberg Fellow. He is a prolific\, impactful aut
 hor with an extensive list of national and international \ncollaboration
 s established through projects funded by EERE’s Fuel Cell Technologies O
 ffice and the Center for Nanophase Materials Sciences\, which is a DOE O
 ffice of Science User Facility.  \nHe also holds a joint faculty appoint
 ment with the Bredesen Center for Interdisciplinary Research and Graduat
 e Education at the University of Tennessee\, Knoxville.  \nHe received t
 he Presidential Early Career Award for Scientists and Engineers\, the hi
 ghest honor bestowed by the U.S. government on outstanding scientists an
 d engineers beginning \ntheir independent careers\, in 2019 in recogniti
 on of his groundbreaking scientific accomplishments in correlating the a
 tomic structure and chemistry of fuel cell materials with fuel cell \ndu
 rability and performance using advanced\, analytical aberration-correcte
 d scanning transmission electron microscopy.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:3rd Floor Seminar Room\, National Graphene Insitute\, Oxford Roa
 d\, Manchester\, M13 9PL
END:VEVENT
END:VCALENDAR