Preparation and performance testing of alkyne-rich graphene-based hydrogen-adsorbing nanocomposites

PdO is often used to adsorb hydrogen from the desorption of the material in the annular space of cryogenic vessels. However, due to the rarity of palladium in nature, it is particularly necessary to design an efficient hydrogen adsorbent. Alkynylated graphene oxide (AGO) serves as the basis for PdO...

Full description

Saved in:
Bibliographic Details
Published inInternational journal of hydrogen energy Vol. 89; pp. 907 - 916
Main Authors Dai, Zixuan, Chen, Shuping, Liu, Jingzhong, Ma, Z iyang, Wang, Bo
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 04.11.2024
Subjects
Alkynylated polyvinyl alcohol
Graphene
Hydrogen absorption
Palladium oxide
Palladium oxide
Hydrogen absorption
Alkynylated polyvinyl alcohol
Graphene
Online AccessGet full text

Cover

More Information
Summary:PdO is often used to adsorb hydrogen from the desorption of the material in the annular space of cryogenic vessels. However, due to the rarity of palladium in nature, it is particularly necessary to design an efficient hydrogen adsorbent. Alkynylated graphene oxide (AGO) serves as the basis for PdO in AGO-PdO nanocomposites. AGO-PdO is then mixed with alkynylated polyvinyl alcohol (Alkyne-PVA) to form AGO-PdO-(Alkyne-PVA) nanocomposites through self-assembly and grinding methods, respectively. The microstructure and morphology of AGO-PdO and AGO-PdO-(alkyne-PVA) nanocomposites are characterized, and hydrogen adsorption performance are tested. The results show that AGO is an excellent basis for loading PdO nanoparticles. The AGO-PdO-(Alkyne-PVA) nanocomposites prepared by grinding demonstrate a significant enhancement in adsorption performance. In contrast, the AGO-PdO-(Alkyne-PVA) nanocomposites prepared by the self-assembly method exhibit a markedly inferior adsorption performance, which can be attributed to the encapsulation of the PdO nanoparticles by alkynylated polyvinyl alcohol. [Display omitted] •AGO is an excellent basis for loading of PdO.•AGO-PdO-(Alkyne-PVA) nanocomposites prepared by the grinding method showed an excellent adsorption performance.•The multiple use of the precious metal palladium.
ISSN:0360-3199
DOI:10.1016/j.ijhydene.2024.09.301