We acknowledge the following partners for funding US DOE, Office of Basic Energy Sciences Multidisciplinary University Research Initiative Center on Nanostructuring for Efficient Energy Conversion The Danish Council for Strategic Research Global Climate Change & Energy Project SLAC Laboratory Directed Research & Development BASF Haldor Topsøe A/S Honda Research Institute USA Danish Agency for Science, Technology and Innovation Office of the Stanford Dean of Research Dow Corning JNC Corporation