Hydrothermally Synthesized Sulfur and Phosphorus-Doped Ternary Metal Electrocatalysts for Efficient Hydrogen Evolution Reaction

Abstract

The Growing Demand For Energy Along With The Environmental Impact And Potential Scarcity Of Fossil Fuels Has Underscored The Urgent Need For Alternative Energy Carriers. Green Hydrogen Is A Clean And High-Energy Alternative, But Its Adoption Is Hindered By The Limited Availability And High Cost Of Platinum-Group Metals (Pgm). To Address This Challenge, The Present Study Aims To Develop Multi-Element Transition Metal Electrocatalysts Doped With Non-Metals For Effective Hydrogen Evolution Reaction (Her). In This Work, A Sulfur And Phosphorus Co-Doped Ternary Metal Electrocatalyst (Ni, Mo, V)-P, S Was Synthesized Via A One-Step Hydrothermal Method Using Nickel Foam As A Substrate. The Synthesized Catalyst Was Characterized Using X-Ray Diffraction (Xrd), Which Confirmed The Formation Of Crystalline Ni-Based Phases And Revealed Structural Changes Induced By Phosphorus And Sulfur Doping, Which Influence Catalytic Behavior. Scanning Electron Microscope (Sem) Revealed Extremely Rough Surface With Uniform Deposition On The 3d Porous Structure Of The Nickel Foam, Promoting Increased Surface Area. Energy Dispersive X-Ray Spectroscopy (Eds) Confirmed The Presence Of Ni, Mo, V, S, And P Elements, While X-Ray Photoelectron Spectroscopy (Xps) Further Confirmed The Presence Of Nickel, Molybdenum, Vanadium And Sulfur And Provided Evidence Of Favorable Chemical States. The (Ni, Mo, V)-P,S Catalyst Showed Superior Her Activity Requiring An Overpotential Of Only -53 Mv At 10 Macm-2, And Electrochemical Impedance Spectroscopy (Eis) Revealed A Low Charge Transfer Resistance Of 1.2 ??, Which Shows Rapid Electron Transfer At The Electrode?�?Electrolyte Interface. The Electrocatalyst Showed A Sustained Operation For ~ 30,000 Seconds Under High Current Density Of 100 Macm-2, Confirming Consistent Operational Stability Without Significant Degradation. These Findings Emphasize The Effectiveness Of Co-Doping And Ternary Metal Synergy In Regulating The Electronic Structure And Her Kinetics, Making The (Ni, Mo, V)-P, S Catalyst A Promising Alternative To Pgm For Efficient Hydrogen Evolution In Alkaline Water Electrolysis.