Influence of Nature of Carbon Support Over NANO Mo2c on Her Activity and Storage Capacity
Hydrogen production through electrocatalytic process has shown significant impact as a part of solution to sustainable and affordable zero emission energy source. The demand of cost-effective, high efficient and stable electrocatalyst for overall electrochemical water-splitting is critical to renewable energy systems. The commercial scale production of hydrogen as green energy source is obstructed due to the utilization of costly and efficient noble metal catalysts Pt, Pd etc. The carbonaceous compounds/carbon supported nano structures are the promising catalyst for hydrogen evolution reaction (HER).Thesenano sized materials containing the porous nature of surface carbon are suitable candidates for improving charge transfer rate and capacitance. Carbon coated Mo2C nano powders were synthesized through simple reduction-carburization route in an autoclave. Rietveld refinement of XRD data confirmed the formation of stable hexagonal Mo2C (P63/mmc) phase. Variation in reaction temperature as well as reaction time facilitated the reduction and carburization to form Mo2C having different morphological features as analyzed with the help of FESEM and TEM.The surface chemistry analysis was done via XPS and BET. The electrochemical analysis were done to study the electrocatalytic behavior and charge storage capacity of synthesized nano powders in acidic medium. The linear sweep voltammetry (LSV) and cyclic voltammetry (CV) analysis was done in low potential range 0.2 to -0.3V at a scan rate of 2 and 100 mVs-1.The LSV measurements showed negligible change in current after 3000 CV cycles. This show the higher stability of the synthesized nano powders, which is highly desirable. The electric double layer capacitance (EDLC) measurements were done via CV performed a multiple scan rates (20-320 mVs-1). The nature of surface carbon showed significant impact on charge transfer, stability and charge storage ability.