Disociación fotocatalítica del agua (TiO₂)

2H2O → 2H2 + O2

Descripción general

Titanium dioxide absorbs UV light and generates electron-hole pairs that can split water into hydrogen and oxygen. Discovered by Fujishima and Honda in 1972, this reaction is the basis of artificial photosynthesis research. The bandgap of TiO₂ (3.2 eV) limits absorption to UV, so researchers are developing visible-light photocatalysts.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Agua H₂O 2 (l)

Ejemplo cotidiano

Self-cleaning glass windows are coated with TiO₂ that photocatalytically decomposes organic dirt when exposed to sunlight.

Importancia industrial

Área de investigación clave para la producción de hidrógeno solar limpio en la economía del hidrógeno.

Preguntas frecuentes

What is the equation for Disociación fotocatalítica del agua (TiO₂)?
The balanced equation is: 2H₂O → 2H₂ + O₂.
What type of reaction is Disociación fotocatalítica del agua (TiO₂)?
Disociación fotocatalítica del agua (TiO₂) is a fotoquímica reaction.
Is Disociación fotocatalítica del agua (TiO₂) exothermic or endothermic?
Disociación fotocatalítica del agua (TiO₂) is endothermic (absorbs energy). The enthalpy change (ΔH) is 572.0 kJ/mol.
What conditions are needed for Disociación fotocatalítica del agua (TiO₂)?
This reaction requires a catalyst (TiO₂ (titanium dioxide)).