1. Energy
Research Institute @ NTU (ERI@N), Nanyang Technological University, Research Techno Plaza, 50 Nanyang Drive, 637553 Singapore
2. School
of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
3. Johnson Matthey Technology Centre, Reading, RG4 9NH, U.K.
4. Department
of Chemistry, Indian Institute of Science Education and Research, Tirupati-517507, India