1. Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 08930 Sant Adrià del Besos, Spain
2. The ISIS Facility, STFC Rutherford Appleton Laboratory,
Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom
3. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden