Enhancing the hydrogen storage capacity of Pd-functionalized multi-walled carbon nanotubes

Singh, Priyanka; Kulkarni, Mukta V.; Gokhale, Suresh; Chikkali, Samir H.; Kulkarni, Chandrashekhar V.

doi:10.1016/j.apsusc.2011.11.075

Cited by 47 publications

(25 citation statements)

References 37 publications

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“…Surface area is not the predominant factor in determining the hydrogen adsorption capacity through the chemisorption or spillover mechanism3537. Doping with transition metals (e.g., Pd, Pt, Ni) is an effective way to enhance the hydrogen storage capacity, as demonstrated by several literatures3839. Transition metals have strong ability in storage and dissociation of hydrogen, and palladium (Pd) is a conventional hydrogen storage metal.…”

Section: Discussionmentioning

confidence: 99%

Carbon hybridized halloysite nanotubes for high-performance hydrogen storage capacities

Jin

Yang

et al. 2015

Sci Rep

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Hybrid nanotubes of carbon and halloysite nanotubes (HNTs) with different carbon:HNTs ratio were hydrothermally synthesized from natural halloysite and sucrose. The samples display uniformly cylindrical hollow tubular structure with different morphologies. These hybrid nanotubes were concluded to be promising medium for physisorption-based hydrogen storage. The hydrogen adsorption capacity of pristine HNTs was 0.35% at 2.65 MPa and 298 K, while that of carbon coated HNTs with the pre-set carbon:HNTs ratio of 3:1 (3C-HNTs) was 0.48% under the same condition. This carbon coated method could offer a new pattern for increasing the hydrogen adsorption capacity. It was also possible to enhance the hydrogen adsorption capacity through the spillover mechanism by incorporating palladium (Pd) in the samples of HNTs (Pd-HNTs) and 3C-HNTs (Pd-3C-HNTs and 3C-Pd-HNTs are the samples with different location of Pd nanoparticles). The hydrogen adsorption capacity of the Pd-HNTs was 0.50% at 2.65 MPa and 298 K, while those of Pd-3C-HNTs and 3C-Pd-HNTs were 0.58% and 0.63%, respectively. In particular, for this spillover mechanism of Pd-carbon-HNTs ternary system, the bidirectional transmission of atomic and molecular hydrogen (3C-Pd-HNTs) was concluded to be more effective than the unidirectional transmission (Pd-3C-HNTs) in this work for the first time.

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Section: Discussionmentioning

confidence: 99%

Carbon hybridized halloysite nanotubes for high-performance hydrogen storage capacities

Jin

Yang

et al. 2015

Sci Rep

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“…PVP clearly acted as a stabilizing agent in the reduction of Pd NPs on the TiO 2 surfaces, i.e., as can be seen in Figure 1a, without PVP as a stabilizing agent, the Pd particles agglomerated significantly and the amount of Pd loaded on the TiO 2 surfaces was smaller than that with PVP. This is probably because the carbonyl groups of PVP can coordinate with the metal to stabilize the NPs, thereby reducing aggregation 23. The Pd/ p ‐TiO 2 MWCNTs were smaller and had a narrower size distribution than the Pd/TiO 2 MWCNTs, as shown in Figures 1c and d. A comparison with the results of our previous study 21 shows there was little difference between the ESAs, indicating that the use of PVP does not greatly affect the ESA.…”

Section: Resultsmentioning

confidence: 69%

Synthesis and Performance of Polyvinylpyrrolidone‐Protected Pd Nanoparticles Supported on TiO₂MWCNTs under Protection of PVP for in Alcohols Oxidation in Alkaline Media

Pan

Cui

et al. 2015

Electroanalysis

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This paper describes the synthesis and performance of Pd/p‐TiO2‐MWCNTs for alcohol electrooxidation. Regulation of the steric repulsive forces of polyvinylpyrrolidone was used to achieve even dispersion of Pd nanoparticles over the TiO2 surfaces. The order of the electroactivities of the Pd/p‐TiO2MWCNTs in alcohol oxidation was ethanol>ethylene glycol>methanol. The order of the stabilities of alcohol oxidation by Pd/p‐TiO2MWCNTs was ethylene glycol>ethanol>methanol. Electroimpedance spectroscopy showed that at a potential of −0.1 V, the Pd/p‐TiO2MWCNTs had good tolerance of adsorbed CO in ethylene glycol oxidation, and at −0.2 V, the Pd/p‐TiO2MWCNTs had good adsorbed CO tolerance in methanol oxidation.

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“…17 The polymer layer may block electron transport pathways in the nanotube, reducing the conductivity of the composites. 39,[41][42][43][44][45][46] Palladium is exhibited to be one of the most versatile metal catalysts used in industry. 18,19 Moreover, ionizing radiation is currently being employed as a new alternative to create defects in the surface of the nanotubes and also as a method for the production of metallic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…30 Among the metal nanoparticles anchored to CNTs, the Pd decorated one has found attractive interest mainly due to its a Phys. [39][40][41][42][43][44][45][46]50,51 It was reported that binding strength and uptake capacity of the carbon nanotubes can be improved by introducing more dopants mainly due to the electron transfer from dopant to carbon atoms. Box 15875-4413, Tehran, application in various fields such as gas sensing, [31][32][33] glucose detection, 34,35 field-effect transistor 36,37 and hydrogen storage.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen storage property of laser induced Pd-nanoparticle decorated multi-walled carbon nanotubes

et al. 2013

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Hybrid nanomaterials consisting of multi-walled carbon nanotubes (MWCNT) decorated with palladium nanoparticles are fabricated by the nanosecond laser irradiation of solid foil Pd target submerged in the suspension of MWCNTs in deionized water. The aim is to characterize the hydrogen storage property of laser-induced Pd-decorated MWCNTs for various laser doses. The corresponding structural surface properties as well as the yield of induced Pd nanoparticles on the MWCNTs are investigated by means of several characterization methods. The hydrogen storage measurement was carried out based on the cyclic voltammetric method and discharging curves. In general, the hydrogen storage capacity is enhanced with Pd decoration with respect to the pristine MWCNTs.

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Enhancing the hydrogen storage capacity of Pd-functionalized multi-walled carbon nanotubes

Cited by 47 publications

References 37 publications

Carbon hybridized halloysite nanotubes for high-performance hydrogen storage capacities

Carbon hybridized halloysite nanotubes for high-performance hydrogen storage capacities

Synthesis and Performance of Polyvinylpyrrolidone‐Protected Pd Nanoparticles Supported on TiO₂MWCNTs under Protection of PVP for in Alcohols Oxidation in Alkaline Media

Hydrogen storage property of laser induced Pd-nanoparticle decorated multi-walled carbon nanotubes

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Enhancing the hydrogen storage capacity of Pd-functionalized multi-walled carbon nanotubes

Cited by 47 publications

References 37 publications

Carbon hybridized halloysite nanotubes for high-performance hydrogen storage capacities

Carbon hybridized halloysite nanotubes for high-performance hydrogen storage capacities

Synthesis and Performance of Polyvinylpyrrolidone‐Protected Pd Nanoparticles Supported on TiO2MWCNTs under Protection of PVP for in Alcohols Oxidation in Alkaline Media

Hydrogen storage property of laser induced Pd-nanoparticle decorated multi-walled carbon nanotubes

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Synthesis and Performance of Polyvinylpyrrolidone‐Protected Pd Nanoparticles Supported on TiO₂MWCNTs under Protection of PVP for in Alcohols Oxidation in Alkaline Media