1. Department of Chemistry University of Bath Claverton Down BA2 7AY Bath UK
2. School of Engineering University of Liverpool Liverpool L69 3BX UK
3. Department of Chemical Engineering and Biotechnology University of Cambridge Philippa Fawcett Drive Cambridge CB3 0AS UK
4. Johnson-Matthey Fuel Cells Swindon UK
5. Materials and Chemical Characterisation Facility (MC2) University of Bath Claverton Down BA2 7AY Bath UK
6. School of Chemistry Molecular Sciences Institute University of the Witwatersrand Private Bag 3 Wits PO ZA-2050 Johannesburg South Africa
7. Department of Chemistry Electrochemistry & Materials Science Research Laboratory Federal University of Technology Owerri Owerri Nigeria