1. Department of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
2. The University of Manchester at Harwell, Diamond Light Source, Harwell Campus, Didcot OX11 0DE, United Kingdom
3. School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
4. Diamond Light Source, Didcot OX11 0DE, United Kingdom
5. National Physical Laboratory, Hampton Rd, Teddington, Middlesex TW11 0LW, United Kingdom
6. Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
7. Institute of Materials Chemistry, Vienna University of Technology (TU Wien), Getreidemarkt 9/165, A-1060 Vienna, Austria
8. National EPSRC XPS Users’ Service (NEXUS), School of Mechanical and Systems Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, United Kingdom