1. Laboratory for Applied Molecular Modelling, Research Focus Area: Chemical Resource Beneficiation, North-West University, Private Bag X6001, Potchefstroom, 252, South Africa
2. Johnson Matthey Technology Center, Belasis Avenue, Billingham TS23 1LH, UK
3. Johnson Matthey Technology Center, Blount's Court, Sonning Common, Reading RG4 9NH, UK
4. Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK