1 Department of Material Science and Engineering, College of Design and Engineering, National University of Singapore, 9 Engineering Drive 1, EA #03-09, Singapore, 117575, Singapore.
2 Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, 4 Engineering Drive 4, E5 #02-29, Singapore, 117585, Singapore.
3 Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore. xi_shibo@isce2.a-star.edu.sg.
4 Department of Chemistry, National University of Singapore, 12 Science Drive 3, Singapore, 117543, Singapore.
5 SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.
6 Centre for Hydrogen Innovations, National University of Singapore, E8, 1 Engineering Drive 3, Singapore, 117580, Singapore.
7 SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
8 Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, 4 Engineering Drive 4, E5 #02-29, Singapore, 117585, Singapore. wanglei8@nus.edu.sg.
9 Centre for Hydrogen Innovations, National University of Singapore, E8, 1 Engineering Drive 3, Singapore, 117580, Singapore. wanglei8@nus.edu.sg.
10 Department of Material Science and Engineering, College of Design and Engineering, National University of Singapore, 9 Engineering Drive 1, EA #03-09, Singapore, 117575, Singapore. pcanepa@nus.edu.sg.
11 Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, 4 Engineering Drive 4, E5 #02-29, Singapore, 117585, Singapore. pcanepa@nus.edu.sg.
12 Department of Material Science and Engineering, College of Design and Engineering, National University of Singapore, 9 Engineering Drive 1, EA #03-09, Singapore, 117575, Singapore. mseheq@nus.edu.sg.
13 Centre for Hydrogen Innovations, National University of Singapore, E8, 1 Engineering Drive 3, Singapore, 117580, Singapore. mseheq@nus.edu.sg.