Promoted hydrolysis performances and mechanism of Si-NaBH4-AlCl3 in deionized water |
| |
| Authors: | Zhao Feng Chaoling Wu Shuang Zhong Yungui Chen Hui Chen Yao Wang |
| |
| Affiliation: | 1.Department of Advanced Energy Materials, College of Materials Science and Engineering, Sichuan University, Chengdu 610207, China;2.Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Chengdu 610064, China;3.Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China |
| |
| Abstract: | Si-based hydrolysis material system can be used in mobile/portable hydrogen source applications connected to fuel cells but is limited by alkaline solutions. In the present research, we reported an acid/alkaline free hydrolysis system combining silicon with NaBH4. Samples with different ratios between Si and NaBH4 are prepared via high energy ball milling and hydrolyzed in deionized water at different temperatures. Synergetic effect between silicon and NaBH4 was found in the hydrolysis process. 2Si-NaBH4 sample displays the best hydrolysis performances with the hydrogen yield of 1594 ml·g-1 in deionized water at 70℃. Thereafter, AlCl3 is added into the 2Si-NaBH4 sample to further improve its comprehensive properties. The effect of AlCl3 content and promotion mechanism of the reaction are explored. 2Si-NaBH4-5 wt% AlCl3 sample shows a significant improvement with a high hydrogen yield of 1689 ml·g-1 in deionized water at 70℃ and a corresponding conversion rate of 95.8%, indicating that the Si-NaBH4-AlCl3 composite is promising to be a hydrogen source in applications of mobile/portable fuelcell-powered facilities. |
| |
| Keywords: | |
|
| 点击此处可从《中国化学工程学报》浏览原始摘要信息 |
|
点击此处可从《中国化学工程学报》下载全文 |
|
