Bio-inspired graphene foam decorated with Pt nanoparticles for hydrogen storage at room temperature

Jung, Haesol; Park, Kyung Tae; Gueye, Magatte N.; So, Soon Hyeong; Park, Chong Rae

doi:10.1016/j.ijhydene.2015.12.016

Cited by 32 publications

(16 citation statements)

References 41 publications

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“…In Fig. 4B and C, C1s XPS spectra of COOH functionalized graphene and COOH + /graphene show five peaks ascribed to C=C, C-C, C=O, C-O, O=C-O2628293031, which means that COOH functional groups are successfully introduced into graphene via ion implantation and chemical method. These results are consistent with FTIR.…”

Section: Resultsmentioning

confidence: 92%

Enhancement of interaction of L-929 cells with functionalized graphene via COOH+ ion implantation vs. chemical method

Zhao

Liu

Cao

et al. 2016

Sci Rep

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Low hydrophilicity of graphene is one of the major obstacles for biomaterials application. To create some hydrophilic groups on graphene is addressed this issue. Herein, COOH+ ion implantation modified graphene (COOH+/graphene) and COOH functionalized graphene were designed by physical ion implantation and chemical methods, respectively. The structure and surface properties of COOH+/graphene and COOH functionalized graphene were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle measurement. Compared with graphene, COOH+/graphene and COOH functionalized graphene revealed improvement of cytocompatibility, including in vitro cell viability and morphology. More importantly, COOH+/graphene exhibited better improvement effects than functionalized graphene. For instance, COOH+/graphene with 1 × 1018 ions/cm2 showed the best cell-viability, proliferation and stretching. This study demonstrated that ion implantation can better improve the cytocompatibility of the graphene.

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Section: Resultsmentioning

confidence: 92%

Enhancement of interaction of L-929 cells with functionalized graphene via COOH+ ion implantation vs. chemical method

Zhao

Liu

Cao

et al. 2016

Sci Rep

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“…Using molecular simulation and experimental results at low pressures of 1.01-2.63 bar (1-2.6 atm) and room temperature for a projection of behavior at high pressures, suggests that the projected hydrogen storage capacity at room temperature and 100 bar is around 3.5 wt.% and 25 gL −1 . Its projected performance at room temperature is significantly better than that of MOF-5 and NU-100 (1.65 wt.% at 48 bar and 1.19 wt.% at 90 bar, respectively) [44,45] and comparable to graphene foam decorated with Pt nanoparticles (3.19 wt.% at 100 bar) [52]. This can be attributed to significantly higher values of isosteric heats (8−12 kJ mol −1 compared to 5-6 kJ mol −1 in MOF-5 and NU-100), due to the flexibility of the system, which provides stronger lattice-hydrogen interactions.…”

Section: Discussionmentioning

confidence: 89%

“…Its room temperature performance is 0.3 wt.% at 2.6 bar with isosteric heat of adsorption of 12-13 kJ mol −1 , and predicted to be about 1.8 wt.% at 48 bar and 3.5 wt.% at 100 bar with isosteric heat of around 8.5 kJ mol −1 . While its low pressure performance is inferior to some other room temperature hydrogen storage materials (0.3-0.7 wt.% at 1 atm and 298K) [10][11][12], its high pressure predicted performance is superior or comparable to even the best of the available systems, like graphene foam decorated with Pt nanoparticles (3.19 wt.% at 100 bar) [52]. Its predicted high pressure performance at room temperature is also superior to well known MOFs like MOF-5 and NU-100 (…”

Section: Introductionmentioning

confidence: 87%

Hydrogen storage in a layered flexible [Ni2(btc)(en)2]n coordination polymer

Blagojević

Lukic

Begović

et al. 2016

International Journal of Hydrogen Energy

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Ni 2 (btc)(en) 2 ] n coordination polymer exhibits a layered two-dimensional structure with weak interaction between the layers. Correlation of experimental measurements and DFT calculations and molecular simulations demonstrated that its structural features, primarily the inherent flexibility of the layered polymeric structure, lead to improved hydrogen storage performance at room temperature, due to significant enhancement in isosteric heats of hydrogen adsorption. Volumetric measurements of hydrogen adsorption at room temperature show up to 0.3 wt.% hydrogen absorbed at 303K and 2.63 bar of hydrogen pressure, with isosteric heats of adsorption of about 12.5 kJ mol −1 . Predicted performance at room temperature is 1.8 wt.% at 48 bar and 3.5 wt.% at 100 bar, better than both MOF-5 and NU-100, with calculated values of isosteric heats for adsorption of hydrogen are in 8-13 kJ mol −1 range at both 77K and 303K. Grand canonical Monte Carlo calculations show that this material, at 77K, exhibits gravimetric hydrogen densities of more than 10 wt.% (up to 8.3 wt.% excess) with the corresponding volumetric density of at least 66 gL −1 , which is comparable to MOF-5, but achieved with considerably smaller surface area of about 2500 m 2 g −1 . This study shows that layered two-dimensional MOFs could be a step towards MOF systems with significantly higher isosteric heats of adsorption, which could provide better room temperature hydrogen storage capabilities. *

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“…[32][33][34] Nevertheless, reports on extremely high hydrogen uptakes (either in absolute values or relative to reported SSA) by various types of r-GO continue to appear, [35] outnumbering studies which find trivial uptake numbers. [36] In several cases the data presented as an evidence for exceptional hydrogen storage of graphene are represented by abnormal shapes of isotherms [35,37] or obtained by rather uncommon measurement methods. For example, ~4.6wt% uptakes already at 40bar and ambient temperatures were measured by Kim et al using quartz microbalance method.…”

Section: Introductionmentioning

confidence: 99%

“…Pt, Pd, TiO 2 ) provides increase of hydrogen sorption by 10-500%. [28,31,37] In some studies the hydrogen storage values which satisfy and even exceed DOE targets have been reported for temperatures near ambient and assigned to "spillover" mechanism. For example, Parambhath et al reported uptake of ~3wt% for Pd decorated material with SSA of ~470 m 2 /g already at 40bar H 2 pressure.…”

Section: Introductionmentioning

confidence: 99%

Graphene decorated with metal nanoparticles: Hydrogen sorption and related artefacts

Klechikov

Sun

et al. 2017

Microporous and Mesoporous Materials

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Hydrogen sorption by reduced graphene oxides (r-GO) is not found to increase after decoration with Pd and Pt nanoparticles. Treatments of metal decorated samples using annealing under hydrogen or air were tested as a method to create additional pores by effects of r-GO etching around nanoparticles. Increase of Specific Surface Area (SSA) was observed for some air annealed r-GO samples. However, the same treatments applied to activated r-GO samples with microporous nature and higher surface area result in breakup of structure and dramatic decrease of SSA. Our experiments have not revealed effects which could be attributed to spillover in hydrogen sorption on Pd or Pt decorated graphene. However, we report irreversible chemisorption of hydrogen for some samples which can be mistakenly assigned to spillover if the experiments are incomplete.

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Bio-inspired graphene foam decorated with Pt nanoparticles for hydrogen storage at room temperature

Cited by 32 publications

References 41 publications

Enhancement of interaction of L-929 cells with functionalized graphene via COOH+ ion implantation vs. chemical method

Enhancement of interaction of L-929 cells with functionalized graphene via COOH+ ion implantation vs. chemical method

Hydrogen storage in a layered flexible [Ni2(btc)(en)2]n coordination polymer

Graphene decorated with metal nanoparticles: Hydrogen sorption and related artefacts

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