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SUMMARY:Ruthenium-Based Pyrochlore Oxides for Improved Electrocatalysis
DTSTART;VALUE=DATE-TIME:20211125T072600Z
DTEND;VALUE=DATE-TIME:20211125T072700Z
DTSTAMP;VALUE=DATE-TIME:20260718T062700Z
UID:indico-contribution-4194@events01.synchrotron.org.au
DESCRIPTION:Speakers: Bryce Mullens (University of Sydney)\nEnergy securit
 y during the transition to a low-carbon economy is one of society’s gran
 d challenges. One possible method of developing carbon-neutral energy gene
 ration is through the combustion of hydrogen and oxygen gas. However\, the
 se gases must be able to be sustainably sourced using low-emission technol
 ogies.\n \nOne such method is using electrocatalysts – catalysts capable
  of splitting water into hydrogen and oxygen gas in the presence of electr
 icity. Currently\, industry standard electrocatalysts contain a high noble
  metal content\, such as ruthenium and iridium. These metals are extremely
  expensive and their performance can degrade over time. Recently\, pyrochl
 ore oxides have emerged as promising alternatives due to their low noble m
 etal content\, extreme stability\, and high oxygen evolution activity in a
 cidic environments. However\, despite this\, debate currently exists in th
 e literature as to what specific structural properties of these materials 
 lead to their superior electrocatalytic performance. \n\nThis work present
 s full structural models of various ruthenium pyrochlore oxides of the for
 m (Y$_{2-x}M_{x}$)Ru$_{2}$O$_{7-d}$ ($M$ = Mn-Zn) based on various diffrac
 tion and spectroscopic studies. X-ray and neutron diffraction\, as well as
  X-ray absorption spectroscopy\, have been used to determine the short-ran
 ge local and long-range average structures of these electrocatalysts. Cycl
 ic voltammetry measurements have further shown significant oxygen evolutio
 n reaction activity compared to industry-standard ruthenium oxide\, despit
 e containing substantially less ruthenium. This has allowed us to establis
 h structure-functionality relationships for these electrocatalysts\, furth
 er developing and improving them for overall water splitting reactions.\n\
 nhttps://events01.synchrotron.org.au/event/146/contributions/4194/
LOCATION:Online
URL:https://events01.synchrotron.org.au/event/146/contributions/4194/
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