BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Missouri State University/Calendar of Events//EN CALSCALE:GREGORIAN X-WR-TIMEZONE:America/Chicago BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:6253d9a3-4704-480d-8ba5-94cc9ecfff9f.222564@calendar.missouristate.edu CREATED:20221024T131807Z LAST-MODIFIED:20221024T131807Z LOCATION:Kemper Hall 204 SUMMARY:PAMS Seminar: "The Story of Transition Metal Chalcogenides: Multif aceted Electrochemical Applications for Energy Conversion\, Storage\, Sen sing & Catalysis" by Dr. Manashi Nath DESCRIPTION:Dr. Manashi NathDepartment of ChemistryMissouri University of Science and Technology\n\n\nAbstract:Transition metal chalcogenides have  recently been explored for several electrochemical energy-related applica tions with focus on sustainable energy conversion. We have explored elect rocatalytic properties of these TMCs focusing more on elucidating the sur face evolution under operational conditions and correlating solid state c hemistry with electrochemical properties. Several TMCs have been identifi ed as highly efficient electrocatalysts for water splitting. Our main des ign principle is based on the idea that chalcogenides will show much bett er electrocatalytic activity for oxygen evolution compared to the oxides. It has been proposed that the chalcogenide surface evolves into a mixed anionic (hydroxy)chalcogenide active phase. We are investigating this int erface evolution hypothesis through experimental studies and integrating with DFT. The electrochemical tunability of these TMC surfaces along with their increased lattice covalency has also led to development of the con cept that some of these compositions can enhance carbon dioxide reduction . We have focused on Cu and Ni-based chalcogenides based on the hypothesi s that higher d-electron occupancy of the TM within a covalent lattice wi ll lead to better adsorption of intermediate CO on the surface through en hanced metal-to-ligand back-bonding\, which in turn leads to longer dwell time and subsequent reduction of the CO intermediate to higher carbon co ntent reduction products. We have discovered copper chalcogenide and nick el chalcogenides as highly active electrocatalysts for CO2 reduction to C 2 and C3 products with high selectivity. The functionality of TMCs has be en expanded even further by identifying their electrochemical activity to wards small molecule such as glucose\, dopamine\, serotonin oxidation tha t makes them applicable as biosensors. We are trying to understand the in tricacies of TMCs with respect to their electronic\, bonding\, and transp ort properties in an attempt to understand their electrochemical tunabili ty and facile intermediate adsorption on the surface. The over-arching go al is to achieve proper insight regarding the structure-property correlat ion of these transition metal chalcogenides and integrate them into funct ional devices through nanostructuring and interface engineering. X-ALT-DESC;FMTTYPE=text/html:<html><head><title></title></head><body><p><b >Dr.&nbsp\;Manashi Nath<br></b><strong>Department of Chemistry</strong><b r><b>Missouri University of Science and Technology</b></p>\n<p>Abstract:< br>Transition metal chalcogenides have&nbsp\;recently been explored for s everal electrochemical energy-related applications with focus on sustaina ble energy conversion. We have explored electrocatalytic properties of th ese TMCs focusing more on elucidating the surface evolution under operati onal conditions and correlating solid state chemistry with electrochemica l properties. Several&nbsp\;TMCs have been identified as highly efficient electrocatalysts for water splitting. Our main design principle is&nbsp\ ;based on the idea that chalcogenides will show much better electrocataly tic activity for oxygen evolution compared to the oxides. It has been pro posed that the chalcogenide surface evolves into a mixed anionic (hydroxy )chalcogenide active phase. We are investigating this interface evolution hypothesis through experimental studies and integrating with DFT. The el ectrochemical tunability of these&nbsp\;TMC surfaces along with their inc reased lattice covalency has also led to development of the concept that some of these compositions can enhance carbon dioxide reduction. We have focused on Cu and Ni-based chalcogenides based on the hypothesis that hig her d-electron occupancy of the&nbsp\;TM within a covalent lattice will l ead to better adsorption of intermediate CO on the surface through enhanc ed metal-to-ligand back-bonding\, which in turn leads to longer dwell tim e and subsequent reduction of the CO intermediate to higher carbon conten t reduction products.&nbsp\;We have&nbsp\;discovered copper chalcogenide and nickel chalcogenides as highly active electrocatalysts for CO2 reduct ion to C2 and C3 products with high selectivity. The functionality of TMC s has been expanded even further by identifying their electrochemical act ivity towards small molecule such as glucose\, dopamine\, serotonin oxida tion that makes them applicable as biosensors. We are trying to understan d the intricacies of TMCs with respect to their electronic\, bonding\, an d transport properties in an attempt to understand their electrochemical tunability and facile intermediate adsorption on the surface. The over-ar ching goal is to achieve proper insight regarding the structure-property correlation of these transition metal chalcogenides and integrate them in to functional devices through nanostructuring and interface engineering.< /p></body></html> DTSTART;TZID=America/Chicago:20221110T160000 DTEND;TZID=America/Chicago:20221110T170000 SEQUENCE:0 URL:https://physics.missouristate.edu/seminars.htm CATEGORIES:Public,Alumni,Current Students,Faculty,Future Students,Staff END:VEVENT END:VCALENDAR