Scientists have developed a low-cost device that uses an ordinary AAA battery to split water into oxygen and hydrogen gas. Notice the gas bubbles that are produced by electrodes made of inexpensive nickel and iron / Mark Shwartz
Rather than emit greenhouse gases into the atmosphere the way gasoline does, fuel cells running on hydrogen release water. Until now, the clean way to produce hydrogen required the use of prohibitively expensive precious metals. Now, researchers have developed a water-splitting device that runs on ordinary, store-bought batteries. The work was published in Nature Materials this week.