Hydrogen storage over metal-doped activated carbon

Rossetti, Ilenia; Ramis, Gianguido; Gallo, Alessandro; Michele, Alessandro Di

doi:10.1016/j.ijhydene.2015.04.064

Cited by 55 publications

(31 citation statements)

References 33 publications

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“…For example, the hydrogen adsorption capacity of Pd-C-H3-MOFs(Al) is 0.32 wt% measured at 25 °C and 2.65 MPa. The promoting hydrogen adsorption capacity could be attributed to the Pd particles [ 14 , 54 ]. The hydrogen adsorption could be enhanced via chemisorption or spillover [ 39 , 40 , 55 – 57 ].…”

Section: Resultsmentioning

confidence: 99%

Pd Nanoparticles and MOFs Synergistically Hybridized Halloysite Nanotubes for Hydrogen Storage

2017

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Natural halloysite nanotubes (HNTs) were hybridized with metal–organic frameworks (MOFs) to prepare novel composites. MOFs were transformed into carbon by carbonization calcination, and palladium (Pd) nanoparticles were introduced to build an emerging ternary compound system for hydrogen adsorption. The hydrogen adsorption capacities of HNT-MOF composites were 0.23 and 0.24 wt%, while those of carbonized products were 0.24 and 0.27 wt% at 25 °C and 2.65 MPa, respectively. Al-based samples showed higher hydrogen adsorption capacities than Zn-based samples on account of different selectivity between metal and hydrogen and approximate porous characteristics. More pore structures are generated by the carbonization reaction from metal–organic frameworks into carbon; high specific surface area, uniform pore size, and large pore volume benefited the hydrogen adsorption ability of composites. Moreover, it was also possible to promote hydrogen adsorption capacity by incorporating Pd. The hydrogen adsorption capacity of ternary compound, Pd-C-H3-MOFs(Al), reached 0.32 wt% at 25 °C and 2.65 MPa. Dissociation was assumed to take place on the Pd particles, then atomic and molecule hydrogen spilled over to the structure of carboxylated HNTs, MOFs, and the carbon products for enhancing the hydrogen adsorption capacity.

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Section: Resultsmentioning

confidence: 99%

Pd Nanoparticles and MOFs Synergistically Hybridized Halloysite Nanotubes for Hydrogen Storage

2017

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“…Finally, it is concluded that for improved hydrogen adsorption hydrogen adsorption at 77 K, at low activation temperature big carbonised pa rticles are required whereas at high activation temperature smaller carbonised particles gives better results. Rossetti et al have prepared metal doped AC using different metals such as Ni, Cu, Rh, Pd, and Pt in different amounts (ie, 0.5 and 2 wt%). They reported that textural property of prepared samples was not altered appreciably.…”

Section: Hydrogen Storage In Carbon Materialsmentioning

confidence: 99%

Hydrogen storage in carbon materials—A review

et al. 2019

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It is well known that three challenges of hydrogen economy, that is, production, storage, and transportation or application put tremendous stress on scientific community for the past several decades. Based on several investigations, reported in literature, it is observed that the storage of hydrogen in solid form is more suitable option to overcome the challenges like its storage and transportation. In this form, hydrogen can be stored by absorption (metal hydrides and complex hydrides) and adsorption (carbon materials). Compared to absorption, adsorption of hydrogen on carbon materials is observed to be more favorable in terms of storage capacity. Taking in to account of these facts, in this short review, an overview on hydrogen adsorption on activated carbon and different allotropes of carbon like graphite, carbon nanotubes, and carbon nanofibers is presented. Synthesis processes of all the carbon materials are discussed in brief along with their hydrogen storage capacities at different operating conditions, and thermodynamic properties and reaction kinetics. In addition, different methods to improve hydrogen storage capacities of carbon materials are presented in detail. Finally, comparison is made between different carbon materials to estimate the amount of hydrogen that can be stored and retract practically. The experimentally measured maximum hydrogen storage capacity of activate carbon, graphite, single‐walled nanotubes, multiwalled nanotubes, and carbon nanofibers at room temperature are 5.5 wt%, 4.48 wt%, 4.5 wt%, 6.3 wt%, and 6.5 wt%, respectively.

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“…The modification of carbon materials with doping of transition metals potentially enhance the hydrogen capacity at ambient conditions [6]. By adding these metals to the carbon structures, a composite material that combines both physical and chemical adsorption processes are obtained.…”

Section: Introductionmentioning

confidence: 99%

“…This type of activation can be justified via the spillover mechanism which involves the dissociative chemisorption of hydrogen molecules on the transition metals that results in the formation of hydrogen atoms. This is because high hydrogen adsorption capacities at practical temperatures rely on the chemical reaction between carbon and hydrogen atoms [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of activated carbon doped with transition metals for hydrogen storage

Ya’aini

Krishnan

et al. 2019

E3S Web Conf.

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Carbon materials with high porosity and surface area such as activated carbons with a combination of metal possess great materials to obtain maximum hydrogen adsorption via the hydrogen spillover effect. The properties of activated carbon doped with metals (copper, nickel and palladium) were studied to evaluate the capacity of hydrogen sorption on the materials. Characteristics of the activated carbon doped with copper (AC-Cu), nickel (AC-Ni) and palladium (AC-Pd) were evaluated using particle density test, Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD) and surface and pore analysis (BET). The performance of hydrogen adsorption of the materials was carried out at different pressures of 50, 100 and 150 psi. Characterization of the materials shows that FTIR spectroscopy manage to detect surface functional groups meanwhile the carbon structure and metal content was determined using XRD. BET analysis shows the presence of oxygen groups was decrease the specific surface area whereas the presence of transition metals had increased the surface area. Hydrogen adsorption test at 150 psi indicates that oxygen groups are not a good adsorption characteristic with only a maximum of 0.39 wt% of hydrogen was adsorbed compared to pristine activated carbon’s 0.42 wt% at 150 psi. The presence of transition metals, copper, nickel and palladium increased the overall hydrogen uptake with 0.52 wt%, 0.44 wt% and 0.62 wt% respectively at 150 psi.

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Hydrogen storage over metal-doped activated carbon

Cited by 55 publications

References 33 publications

Pd Nanoparticles and MOFs Synergistically Hybridized Halloysite Nanotubes for Hydrogen Storage

Pd Nanoparticles and MOFs Synergistically Hybridized Halloysite Nanotubes for Hydrogen Storage

Hydrogen storage in carbon materials—A review

Synthesis of activated carbon doped with transition metals for hydrogen storage

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