While utilising solar energy has been previously limited by the efficiency of batteries, and is somewhat still limited by their physical weight, hydrogen has often seemed another clean fuel alternative and now solar energy may be able to turn salt water into hydrogen for fuel as well. This process utilises the age old method of electrolysis, but uses solar energy from photovoltaic cells to power the process and causes a reaction in water to release pure hydrogen and oxygen. However the contacts, or electrodes, in the water suffer from corrosion and the reaction in this method is short-lived without constant electrode replacement. What has been discovered by researchers at Stanford University in the United States is that if one conductive electrode is coated with negatively charged particles corrosion is slowed and electrodes last hundreds of times longer. This could not only help current electrolyser systems become more efficient, but could help develop new hydrogen fuel innovations such a hydrogen vehicles, and could even be used as a passive oxygen production method to combat climate change and ocean acidification directly.