Superior catalytic effect of Bi@C on dehydrogenation performance of α-AlH3.
In: International Journal of Hydrogen Energy, Jg. 50 (2024-01-10), S. 1164-1173
Online
academicJournal
Zugriff:
The high dehydrogenation temperature of α-AlH 3 has always been an important factor hindering its development. In order to solve this problem, we synthesize Bi-MOF by hydrothermal method and burn it under inert gas to obtain Bi@C, which is used as catalyst (x Bi@C, x = 3, 5 and 7 wt%) to improve the hydrogen desorption performance of α-AlH 3. The dehydrogenation onset temperature of α-AlH 3 +5 wt% Bi@C drop to 80.4 °C, which is reduced by 43.4% compared with pure α-AlH 3. At 120 °C, it can provide a stable hydrogen capacity of 7.45 wt%. In contrast, pure α-AlH 3 releases only 6.66 wt% hydrogen at the same time. The density functional theory calculations further indicate that the existence of Bi@C catalyst can make the Al–H bond length increase, more conducive to the release of hydrogen. The results show that the synergistic effect of Bi and porous carbon in Bi@C materials can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage. [Display omitted] • The dehydrogenation performance of the Bi@C doped α-AlH 3 is investigated. • The Bi@C can reduce the initial hydrogen release temperature of α-AlH 3 and accelerate the hydrogen release rate. • The catalytic principle relies on the synergistic effects of Bi and porous carbon. [ABSTRACT FROM AUTHOR]
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Superior catalytic effect of Bi@C on dehydrogenation performance of α-AlH3.
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Autor/in / Beteiligte Person: | Zhao, Yuan ; Wang, Qingshuang ; Yin, Dongming ; Li, Shouliang ; Wang, Chunli ; Liang, Long ; Zhao, Shaolei ; Zhang, Chunmin ; Wang, Limin ; Cheng, Yong |
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Zeitschrift: | International Journal of Hydrogen Energy, Jg. 50 (2024-01-10), S. 1164-1173 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0360-3199 (print) |
DOI: | 10.1016/j.ijhydene.2023.09.049 |
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