Low-temperature solid-state hydrogen storage via efficiently catalyzed MgH2
By
Dan, L (Dan, Liang) [1] ; Wang, H (Wang, Hui) [1] ; Yang, XB (Yang, Xiaobao) [1] ; Liu, JW (Liu, Jiangwen) [1] ; Ouyang, LZ (Ouyang, Liuzhang) [1] ; Zhu, M (Zhu, Min) [1]
(provided by Clarivate)
Source
RENEWABLE ENERGY
Volume231
DOI10.1016/j.renene.2024.121009
Article Number
121009
Published
SEP 2024
Early Access
JUL 2024
Indexed
2024-07-28
Document Type
Article
Abstract
The urgent development of safe, high-density hydrogen transport and storage technologies is crucial for renewable hydrogen energy. In the present work, a highly efficient N, Nb-doped TiO2 catalyst was synthesized using an NH3 plasma process to catalyze reversible hydrogen sorption of the high-density hydride MgH2. The catalyzed MgH2 exhibits rapid hydrogen uptake even at room temperature and dehydrogenation at a greatly decreased temperature of 175 degrees C. The onset dehydrogenation temperature of the catalyzed MgH2 is reduced to 155 degrees C with an activation energy of 57.33 kJ/mol. Theoretical calculations suggest that the modified TiO2 significantly reduces the dissociation energy barrier and the H2 dissociation energy, accelerating the combination of hydrogen atoms with Mg. The presence of N atoms could also weaken the Mg-H bonds, facilitating the decomposition of MgH2. This work demonstrates the potential of high-density solid-state hydrogen storage via catalyzed MgH2 under moderate conditions.
Keywords
Author KeywordsHydrogen energyMgH2N-dopingNb-doping
Keywords PlusELASTIC BAND METHODPHOTOCATALYTIC ACTIVITYMAGNESIUM HYDRIDETIO2KINETICSSORPTIONMETALSABSORPTION
Author Information
Corresponding Address
Wang, Hui
(corresponding author)
South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
Affiliation
South China University of Technology
South China University of Technology Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials
South China University of Technology School of Materials Science and Engineering
E-mail Addresses
mehwang@scut.edu.cn
Addresses
1 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
E-mail Addresses
mehwang@scut.edu.cn
Categories/ Classification
Research AreasScience & Technology - Other TopicsEnergy & Fuels
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
Green & Sustainable Science & TechnologyEnergy & Fuels