Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 4, Issue 6, Pages 2206-2212Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ee00014d
Keywords
-
Funding
- National Basic Research Program of China (973 program) [2010CB631305]
- National Natural Science Foundation of China [51071155]
- Natural Science Foundation of Liaoning Province [20102231]
- CAS [KGCXZ-YW-342]
Ask authors/readers for more resources
The addition of an alkali has been identified as a simple but effective approach for promoting aluminium (Al)/water (H2O) reactions. However, the use of alkaline solution causes problems with corrosion of system apparatus. We herein report a novel method that can simultaneously address the Al/H2O reaction kinetics and alkali corrosion problems. Our study found that a combined usage of sodium hydroxide (NaOH) and sodium stannate (Na2SnO3) can dramatically improve the hydrogen generation kinetics of the Al-H2O system. Furthermore, the addition of a small amount of Na2SnO3 causes a remarkable decrease of NaOH concentration, which is required for achieving favorable system performance. The factors influencing the hydrogen generation performance of the system were investigated. In the preliminary mechanistic study, the solid samples that were collected at different reaction stages were examined by X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy. Our study showed that the most likely mechanism for the promoting effect of Na2SnO3 is the in situ deposition of metallic Sn particles on the Al surface, which act as local inhibitors of the repassivation of Al.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available