http://www.greencarcongress.com/2008/03/quantumsphere-n.html
This is truly amazing to me. At that kind of efficiency fuel cell back up for wind power suddenly makes a whole lot more sense, or using nuclear power to produce hydrogen instead of CTL.QuantumSphere has demonstrated production of hydrogen and oxygen in an alkaline electrolyzer with 85% percent efficiency under ambient conditions, making it a commercially viable replacement for fossil fuel-based production methods (e.g., steam methane reforming), according to the company. The DOE 2010 target for the efficiency of electrolysis is 75%.