Efficient hydrogen generation from noncatalytic alcoholysis of Al/LiBH4 mixture for fuel cell applications
By
Chen, K (Chen, Kang) [1] ; Liu, ML (Liu, Mili) [2] ; Li, YA (Li, Yongan) [2] ; Zhao, SQ (Zhao, Shiqian) [3] ; Cheng, XX (Cheng, Xinxuan) [1] ; Huang, JC (Huang, Jincheng) [1] ; Zhao, J (Zhao, Jing) [1] ; Gan, L (Gan, Lang) [1] ; Ren, YJ (Ren, Yanjie) [1] ; Ouyang, LZ (Ouyang, Liuzhang) [2]
(provided by Clarivate)
Source
MATERIALS CHEMISTRY AND PHYSICS
Volume323
DOI10.1016/j.matchemphys.2024.129611
Article Number
129611
Published
SEP 1 2024
Early Access
JUL 2024
Indexed
2024-07-16
Document Type
Article
Abstract
Aluminum (Al) and lithium borohydride (LiBH4, LB for short) are highly promising candidates for chemical hydrogen storage. However, the direct utilization of Al-H2O reaction faces significant challenges due to the inherent issue of surface passivation, which prevents the ongoing reaction between Al and H2O. Additionally, the hydrolysis of LB is constrained to temperatures exceeding 0 degrees C, and the development of cost-effective catalysts that enable efficient hydrogen release from LB hydrolysis remains a bottleneck in realizing its practical application. Herein, we present an efficient noncatalytic hydrogen generation system utilizing Al and LB mixtures, enabling H2 production over a broad temperature range using methanol, ethanol, or their mixtures as reaction solvents. Our results demonstrate that the H2 generation kinetics of Al-LB composites can be precisely tailored by adjusting various parameters, such as LB content, ball-milling time, reaction temperature, and solution composition. In comparison with the traditional Al and its alloy systems, Al-LB composites exhibit remarkable performance in both hydrogen capacity and H2 kinetics. For instance, the Al-50 % LB composite achieves a hydrogen yield of 2322 mL g- 1 H2 within 5 min (-80 % fuel conversion). Specifically, with a 70 % LB content, the composite generates over 3100 mL g-1 H2 within the same time, realizing nearly 90 % fuel conversion. Notably, the apparent activation energy of the Al-30 % LB and Al-50 % LB composites is determined to be 29.1 kJ mol-1 and 13.9 kJ mol-1, much lower than that of Al-based hydrolyzable materials. These findings hold significant importance for the advancement of practical Al-based hydrogen generation systems designed for mobile or portable applications.
Keywords
Author KeywordsLithium borohydrideAluminumHydrogen generationAlcoholysisPEMFC
Keywords PlusLITHIUM BOROHYDRIDEHYDROLYSIS REACTIONWATER REACTIONALPERFORMANCEMOS2
Author Information
Corresponding Address
Ren, Yanjie
(corresponding author)
Changsha Univ Sci & Technol, Sch Energy & Power Engn, Key Lab Efficient & Clean Energy Utilizat, Changsha 410111, Peoples R China
Corresponding Address
Zhao, Shiqian
(corresponding author)
Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Henan, Peoples R China
E-mail Addresses
ZhaoSQ@hpu.edu.cn
Addresses
1 Changsha Univ Sci & Technol, Sch Energy & Power Engn, Key Lab Efficient & Clean Energy Utilizat, Changsha 410111, Peoples R China
2 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China
3 Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Henan, Peoples R China
E-mail Addresses
ZhaoSQ@hpu.edu.cnryj1008@163.com
Categories/ Classification
Research AreasMaterials Science
Citation Topics
2 Chemistry
2.282 Hydrogen Chemistry & Storage
2.282.594 Hydrogen Storage
Sustainable Development Goals
07 Affordable and Clean Energy
Web of Science Categories
Materials Science, Multidisciplinary