This drawing shows two electrodes splitting water into oxygen (left) and hydrogen (right). The electrodes are connected via an external voltage source. The illuminated silicon electrode (left) is protected from the surrounding electrolyte by a 2-nm film of nickel and uses light energy to assist in the water-splitting process.
Graphics, photographs and videos provided by the Precourt Institute for Energy at Stanford University are to be used - with appropriate credit - for editorial purposes only. Flopping, altering, editing or otherwise embellishing these images and audio clips in any way that changes the editorial content of these images and audio clips is prohibited. Permission is for one-time use only. Supplied image file must be deleted after use.