Executive Summary : | Ecofriendly sustainable and renewable green energy production and storage are crucial for the 21st century energy crisis. Non-precious transition metal-based oxides like spinel, perovskite, brownmillerites, hydroxides, and sulfides have been investigated for energy conversion and storage behaviors. The success of these oxide families is mainly achieved by nano-sized materials. The preparation of bulk-phase double perovskite (DP) structures through the combination of transition metals with 3dn−4dn or 3dn–5dn systems, such as Sr2FeOsO6, Ca2FeRuO6, CaLaFeRuO6, and CaLaScRuO6+δ, has shown their electronic and energy generation properties. To explore a single material for simultaneous energy storage and conversion, the preparation of activated carbon composite with oxide material can be a better option. This can be achieved by optimizing surface area and electrical conductivity along with itinerant metal oxidation states of metals. The chemical stability, high mechanical strength, and presence of transition metal ions can stimulate the fabrication of new composites with porous carbonaceous materials for better electrochemical performances. This proposed project aims to investigate new bulk-phase DPs with activated carbon composite using bio-wastes derived porous carbon materials as multifunctional energy resources. The roles of higher surface areas and active metal sites can be verified through versatile electrochemical and photochemical oxidation-reduction reactions. The efficacy of electro- and photo-chemical water splitting may be induced due to the presence of various transition metal ions, and the high surface area of porous carbonaceous materials may lead to supercapacitor applications. |