Nanosized SrTiO3 Catalyzes Hydrogen Sorption of MgH2
Zhu, JJ (Zhu, Jiajing) [1] , [2] ; Wang, H (Wang, Hui) [1] , [2] ; Huang, LJ (Huang, Liangjun) [1] , [2] ; Ouyang, LZ (Ouyang, Liuzhang) [1] , [2] ; Zhang, L (Zhang, Lan) [3] , [4] ; Zhu, M (Zhu, Min) [1] , [2] , [3]
Source
ACS APPLIED ENERGY MATERIALS
DOI10.1021/acsaem.4c01892
Early Access
SEP 2024
Indexed
2024-09-08
Document Type
Article; Early Access
Abstract
Nanosized SrTiO3, a common photocatalyst that enhances water splitting for hydrogen production, has been synthesized to catalyze the reversible hydrogen gas-solid reaction of MgH2. Compared to the pure MgH2, the milled MgH2-SrTiO3 composite shows significantly enhanced hydrogen storage properties, absorbing 3.5 wt % H-2 within 1 min at room temperature and releasing 6.1 wt % H-2 within 9 min at 250 degrees C. The activation energy for dehydrogenation is 82.91 kJ/mol, which is 52.09 kJ/mol lower than that of as-milled MgH2. The composite retains a capacity of 5.47 wt % after 40 cycles of dehydrogenation at 250 degrees C. The catalytic mechanism of nanosized SrTiO3 was discussed. Therefore, like anatase TiO2 photocatalysts, SrTiO3 shows an excellent catalytic effect to enhance the hydrogen sorption of MgH2 at significantly lower temperatures. A significant number of photocatalytsts have great potential to enhance the hydrogen sorption of Mg, making them promising candidates for solid-state hydrogen storage materials.
Keywords
Author KeywordsHydrogen storage materialsMagnesium hydrideCatalysisNanoscaleSrTiO3
Keywords PlusSTORAGE PROPERTIESTRANSITION-METALSBEHAVIORKINETICSEVOLUTION
Author Information
Corresponding Address
Wang, Hui;
Zhu, Min
(corresponding author)
South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China
Corresponding Address
Wang, Hui;
Zhu, Min
(corresponding author)
South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
Corresponding Address
Zhu, Min
(corresponding author)
Nanyang Technol Univ, Energy Res Inst NTU ERIN, Singapore 637141, Singapore
E-mail Addresses
mehwang@scut.edu.cn
Addresses
1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China
2 South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
3 Nanyang Technol Univ, Energy Res Inst NTU ERIN, Singapore 637141, Singapore
4 China Singapore Int Joint Res Inst CSIJRI, Guangzhou 510530, Peoples R China
E-mail Addresses
mehwang@scut.edu.cnmemzhu@scut.edu.cn
Categories/ Classification
Research AreasChemistryEnergy & FuelsMaterials Science
Web of Science Categories
Chemistry, PhysicalEnergy & FuelsMaterials Science, Multidisciplinary