Dr. Kirill Kovnir, Iowa State University & US DOE Ames Laboratory
Pnictogens, P, As, and Sb are capable to form extended polyatomic fragments thus mimicking the chemical diversity of carbon. The structure and properties of metal pnictides are controlled by the electron count and size of metal atoms. Kovnir group explored structural design and synthesis of novel pnictides for several energy-related applications, such as thermoelectric energy conversion, electrocatalyst for water splitting, and non-linear optical materials. Contrary to alloys, metal pnictides exhibit strong directional covalent bonding leading to unique properties, which can be rationally tuned by adjusting concentration and electronegativities of constituent elements.
Synthesis of complex pnictides is hampered by drastic differences in reactivities of constituent elements and a high vapor pressure and chemical reactivity of pnictogens. The limitations of conventional synthetic approaches often resulted in empty or severely underexplored ternary and quaternary pnictide systems. Several strategies to shift synthetic approach from trial and error to more predictive synthesis were developed in Kovnir’s group, such as averaging precursor reactivity by atomic mixing, and prebuilding chemical bonds in the precursor.
JOIN WEBEX EVENT
Event number (access code): 2622 151 4889
Event password: q8Nyw8p9qjy (78699879 from phones)
TAP TO JOIN FROM A MOBILE DEVICE (ATTENDEES ONLY)
+1-312-535-8110, United States Toll (Chicago)
Some mobile devices may ask attendees to enter a numeric password.
JOIN BY PHONE
+1-312-535-8110 United States Toll (Chicago)
Global call-in numbers