Electrochemical Water Splitting Cell Diagram - HER & OER Catalysts #2173119 (License: Personal Use)

This diagram depicts a simplified electrochemical cell for water splitting, where a blue sphere represents the semiconductor electrode with a solid-liquid junction (SLJ) at its surface. On the left, the HER catalyst facilitates proton reduction to H₂ (E_H⁺/H₂), while on the right, the OER catalyst drives water oxidation to O₂ (E_H₂O/O₂); an electron (e⁻) moves internally from OER to HER side. The vertical axis shows energy increasing upward, indicating band bending and reaction energetics.

Used in academic and technical web pages explaining renewable hydrogen production, photocatalysis, or electrocatalysis; targets students, researchers, and engineers seeking conceptual clarity on water-splitting mechanisms.