          Yolanda A. Daza 1 , Debtanu Maiti 1 , Bryan J. Hare 1 , Adela Ramos 1 , Matt M. Yung 2 , Venkat R. Bhethanabotla 1 , and John N. Kuhn 1* University of South Florida 1 National Renewable Energy Laboratory 2 Tampa, FL 33620  A chemical looping approach to CO2 conversion has been designed and developed to convert by reverse water gas shift chemical looping. Various formulations of perovskite oxides have been examined experimentally and computational to improve the process. Although the process requires renewable hydrogen, the reaction rates are an order of magnitude higher than other CO2 conversion routes and occurs at much lower temperatures. This contribution focuses on structure6function relations of this class of materials.  carbon dioxide conversion, carbon monoxide production, reverse water gas shift, perovskite oxides, chemical looping  * To whom all correspondence should be addressed Carbon dioxide conversion is a major challenge because of thermodynamic limitations and the sluggish conversion rates. For example, thermodynamics do not predict CO2 splitting until temperatures higher than 2000 K. The reverse water gas shift (RWGS) is the most established approach to convert CO2. It requires H2, which must be produced from renewable, non6hydrocarbon sources to be useful. In addition, the reaction is limited to high temperatures because of kinetics and thermodynamics and methane can form as a side6product. Despite these limitations, Mallapragada et al determined that thermochemical conversion of CO2 to liquid hydrocarbon fuels, with the RWGS reaction employing a solar6heating, was efficient compared, in terms of sun6to6fuel efficiency, to other approaches. The overall goals of this effort are to design processes and materials to enhance efficiency of futuristic CO2 conversion processes involving redox cycles (Figure 1). In this effort, we examine the structure6function relations of various perovskite oxides to further enhance the reverse water gas shift – chemical looping (RWGS6CL) process.          !"  ! While this route has the inherent benefits of avoiding thermodynamic issues by using stoichiometric reactions