This book consists of different electrochemical applications, majorly include, electrochemical determination of explosive nitro-aromatics, enhancing platforms for electrocatalysis, electrochemiluminescence-based applications as well as sensing applications. Followed by various applications of different electroceramic materials. Next chapter well focused on the applications of 2D materials especially in photo catalysis. Succeeding chapter elaborate mesoporous carbon nanomaterials in terms of green and clean energy production and storage. Later chapter comprises of electrochemical water splitting which is driven by electrocatalytic nanostructures, a convenient method to split water into hydrogen and oxygen to realize economical hydrogen production and recent progress and trends in the development of low-cost, earth-abundant transition metal-based electrocatalysts for cathodic 3 hydrogen evolution reaction (HER) with a particular emphasis on nanostructure - catalytic activity relationships. Last chapter incorporate applications of multi-functional RGO based hybrid materials as high-performance supercapacitors.