1. Wolfson Catalysis Centre, Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford OX1 3QR , UK
2. Department of Materials, University of Oxford , Oxford OX1 3PH , UK
3. TRACE EM Unit and Department of Materials Science and Engineering, City University of Hong Kong , Kowloon 999077, Hong Kong SAR , People’s Republic of China
4. City University of Hong Kong Matter Science Research Institute (Futian, Shenzhen) , Shenzhen 518048 , People’s Republic of China
5. Nanomanufacturing Laboratory (NML), City University of Hong Kong Shenzhen Research Institute , Shenzhen 518057 , People’s Republic of China
6. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C), Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
7. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 37673 , South Korea
8. Central Facility for Electron Microscopy, RWTH Aachen University , 52074 Aachen , Germany