IMPACT OF HUMIDITY IN THE PREPARATION OF COTIO3 PEROVSKITES: EFFECTIVE ABO3 TYPE CATALYSTS FOR O2 EVOLUTION

摘要

Environmental pollution and energy storage have turned out tonbe the major challenges of this century. In order to resolve these twonsevere issues, several nanomaterials with attractive physico-chemicalnproperties have been explored and used in energy and environmentalnapplications. The scientific community has turned towards thenperovskite or ilmenite type materials. Although, the design andnpreparation of this type of materials are challenging, significantnprogress has been achieved during the past decades to realize thenrenewable energy utilization. In particular, recently, attention is paidntowards the multicomponent ABO3 type materials due to its uniquenstructural, magnetic, photochemical, and electrical properties.1 It isnknown that many elements in the periodic table can benaccommodated in ABO3 structure, and these types of materials cannbe easily synthesized by substituting different cations in the A and Bnsites. There are several methods reported in the literature to preparenthese materials that include sol-gel, precipitation and co-precipitationnmethod, solid state, reflux, and Pechini method.2,3