Seoin Back, SUNCAT Center for Interface Science and Catalysis, Chemical Engineering, Stanford University, Stanford, CA, Samira Siahrostami, SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, Michal Bajdich, Department of Chemical Engineering, SUNCAT Center for Interface Science and Catalysis, Stanford University and SLAC National Accelerator Laboratory, Stanford, CA and Jens Norskov, chemical engineering, stanford university, stanford, CA