Photocatalytic Water Splitting Mechanism with BiVO₄ and Rh-Doped SrTiO₃ #2173129 (License: Personal Use)

This diagram depicts a dual-photocatalyst Z-scheme system: purple BiVO₄ absorbs photons to generate electron-hole pairs that oxidize water into O₂ and 4H⁺; the photogenerated electrons transfer to green Rh-doped SrTiO₃ (with Pt or Ru co-catalysts), reducing 2H⁺ to H₂. The dashed line marks the donor levels introduced by Rh doping, enabling visible-light absorption and charge separation.

Used in academic and industrial web pages explaining solar fuel generation, particularly in renewable energy research articles, university course materials, and clean-tech product documentation targeting scientists and engineers seeking sustainable hydrogen production methods.