Electro-Oxidation of Metal Oxide-Fabricated Graphitic Carbon Nitride for Hydrogen Production via Water Splitting

Hydrogen is a great sourcez of energy due to having zero emission carbon-based contents. It found primarily in water, which abundant and renewable. For electrochemical splitting water molecules, it necessary use catalytic materials that minimize consumption. As famous carbon material, graphitic nitride, with its excellent physicochemical properties diversified functionalities, presents potential electrocatalytic sensing. In the present work, nitride-fabricated metal tungstate nanocomposites are synthesized by hydrothermal method study their applications catalysis, sensing, for hydrogen production. Nanocomposites using different metals, such as cobalt, manganese, strontium, tin, nickel, were used precursor via process. The (g-C3N4/NiWO4, g-C3N4/MnWO4, g-C3N4/CoWO4, g-C3N4/SnWO4, g-C3N4/SrWO4) characterized techniques, FTIR XRD. presence functional groups between was confirmed spectra. All show peak at 600 cm−1, while vibrational absorption bands metals appear range 400–600 cm−1. X-ray diffraction (XRD) shows characteristic peaks matched JCPDS literature, successful formation all nanocomposites. active surface area calculated taking cyclic voltammograms potassium–ferrocyanide redox couple. Among entire series tungstate, g-C3N4/NiWO4 has large owing high conductive towards oxidation. order activity as-synthesized materials, performed voltammetry alkaline medium. proved be efficient catalysts enhanced series, g-C3N4-NiWO4 very electrocatalyst higher activity. sensing composites is: > g-C3N4-SrWO4 g-C3N4-CoWO4 g-C3N4-SnWO4 g-C3N4-MnWO4. Studies on electrochemically electrocatalysts revealed activity, indicating electrode direct evolution power generation.