Chitosan-assisted hydrogen adsorption and reversibility of Ni-doped hierarchical carbon scaffolds.

Autor: Plerdsranoy P; School of Chemistry, Institute of Science, Suranaree University of Technology Nakhon Ratchasima 30000 Thailand rapee.g@sut.ac.th., Thaweelap N; School of Chemistry, Institute of Science, Suranaree University of Technology Nakhon Ratchasima 30000 Thailand rapee.g@sut.ac.th., Chirachanchai S; Center of Excellence in Bioresources to Advanced Materials, The Petroleum and Petrochemical College, Chulalongkorn University Bangkok 10330 Thailand suwabun.c@chula.ac.th., Utke R; School of Chemistry, Institute of Science, Suranaree University of Technology Nakhon Ratchasima 30000 Thailand rapee.g@sut.ac.th.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2024 Jun 14; Vol. 14 (27), pp. 19106-19115. Date of Electronic Publication: 2024 Jun 14 (Print Publication: 2024).
DOI: 10.1039/d4ra02687j
Abstrakt: We investigated the effects of chitosan (CS) on the hydrogen adsorption and reversibility of hierarchical carbon scaffold (HCS) loaded with Ni nanoparticles. As size-controllable, stabilizing, and shape-directing agents for the green synthesis of metal nanoparticles of CS, Ni nanoparticles with uniform distribution and shape are deposited onto HCS. The latter results in the superior specific surface area of Ni nanoparticles for hydrogen chemisorption. The best hydrogen adsorption capacities at room temperature under 20-70 bar H 2 of 0.5-1.70 wt% H 2 were obtained from 10 wt% Ni-doped HCS-CS. Although macropores of the HCS collapsed upon cycling due to hydrogen pressure applied during adsorption, average hydrogen capacities of 1.17 ± 0.05 wt% H 2 ( T = 25 °C and p (H 2 ) = 50 bar) were maintained for 14 cycles. This is because not only uniform distribution and shape of Ni nanoparticles and microporous structures of the HCS were preserved upon cycling but also the interactions between Ni and heteroatoms (N and O) of the HCS and CS prevented particle agglomeration.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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