Zhenghang Zhao, Chemical Engineering, Stanford University, Stanford, CA, Ambarish R. Kulkarni, School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, Michal Bajdich, Department of Chemical Engineering, SUNCAT Center for Interface Science and Catalysis, Stanford University and SLAC National Accelerator Laboratory, Stanford, CA and Jens Nørskov, Stanford University, Stanford, CA