1. National Renewable Energy Laboratory (NREL), 1617 Cole Blvd. Golden, Colorado 80401, Department of Chemical Engineering, Colorado School of Mines, Golden, Colorado 80401, ADA Technologies, Inc., Littleton, Colorado 80127, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, and Department of Chemistry, Roskilde University (RUC), DK-4000 Roskilde, Denmark