1. Chemistry Department
2. Aksum University
3. Axum
4. Ethiopia
5. School of Physical Science and Technology
6. ShanghaiTech University
7. Shanghai
8. China
9. Addis Ababa University
10. Addis Ababa
11. Department of Chemical and Environmental Technology
12. ESCET
13. Universidad Rey Juan Carlos
14. Madrid
15. Spain
16. Instituto de Catálisis y Petroleoquímica
17. CSIC
18. 28049 Madrid