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Photocatalytic water splitting is a process that uses photocatalysis for the dissociation of water (H2O) into hydrogen (H2) and oxygen (O2). The inputs are light energy (photons) and water. The process, still more hypothetical than practical, depends on catalyst(s). Photocatalytic water splitting is inspired by photosynthesis, which converts water and carbon dioxide into oxygen and carbohydrates. Water splitting using solar radiation has not been commercialized.
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