1. The 11th International Symposium on Hydrogen & Energy (Waikoloa Village, USA , Feb. 26-Mar. 3, 2017)

2. The 2015 International Chemical Congress of Pacific Basin Societies-Hydrogen Storage Symposium (Hawaii, USA , Dec. 15-20, 2015)

3. Low Carbon Earth Summit 2011 (Dalian, China , Oct. 2011)

4. 2011 Material Research Society (MRS) Spring Meeting (San    Francisco, USA , April. 2011)