METAL-ORGANIC FRAMEWORKS AS PRECURSORS FOR MAKING LOW-COST HIGHEFFICIENCY ELECTRO-CATALYSTS IN FUEL CELL AND LI-O2 BATTERY APPLICATIONS –DI-JIA LIU, ARGONNE NATIONAL LABORATORY

摘要

Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) represent two most important cathodic electrochemical processes in fuel cell and Li-O2 battery. An effective catalyst will reduce the kinetic barriers, lower the electrochemical overpotentials and improve the energy conversion efficiencies. Traditional catalysts for ORR and OER typically contain platinum group metals (PGMs) which make these devices expensive. In this presentation, I will discuss our recent work in developing low-cost, high-efficiency non-PGM catalysts for fuel cell and lithium-oxygen battery application. I will demonstrate new approaches to prepare high surface area, high active site density, and support-free electro-catalysts using MOF based compounds as the precursors. The correlation between the MOF structures to the catalyst surface properties and activities will also be discussed.