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SUMMARY:Advantages and drawbacks of (alkaline) direct borohydride fuel cel
 ls
DTSTART:20230116T140000
DTEND:20230116T150000
DTSTAMP:20260513T034340Z
UID:5a1c6a8d98b898cf7214554ef8699b4b798f45f1411863051a67c514
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Marian Chatenet\nAlkaline fuel cells start to compete wi
 th their acidic counterparts owing to the recent development of performant
  anion-exchange membranes\, the possibility to use non-platinum electrocat
 alysts at their electrodes and their propensity to be directly fed with li
 quid fuels. In particular\, fuels of the borohydride family (sodium borohy
 dride\, ammonia borane\, hydrazine borane) have been demonstrated recently
  in unit cells 1\,2. However\, their practical performances\, notably in t
 erms of cell voltage\, efficiency and power\, still fail to meet the theor
 etical promises\, and even the practical ones derived from 3-electrode cel
 l measurements 3.\nBased on mechanistic studies of the borohydride oxidati
 on reaction using coupled physicochemical techniques (Fourier Transform IR
  spectroscopy: FTIR\, differential electrochemical mass spectrometry: DEMS
 )\, the reasons of the discrepancies between theory and practice will be e
 xplained. Special emphasis will be made on hydrogen escape\, electrocataly
 st poisoning by reaction intermediates\, mass-transport (of the reactants 
 and reaction intermediates) 4 and durability of the electrocatalysts 5\,6.
  As a result\, a strategy to design optimized electrodes will be introduce
 d.
LOCATION:Tseuzier (I17 4 K2) https://plan.epfl.ch/?room==I17%204%20K2 http
 s://epfl.zoom.us/j/65856346256?pwd=MXpVa1Z0NWpxWlg1MUNpWUJ2QTBUdz09
STATUS:CONFIRMED
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