Synthesis and characterization of conducting polypyrrole/SBA-3 and polypyrrole/Na–AlSBA-3 composites

Costa, Marcos B. Gómez; Juárez, Juliana M.; Martínez, María Laura; Beltramone, Andrea R.; Cussa, Jorgelina; Anunziata, Oscar A.

doi:10.1016/j.materresbull.2012.11.030

Cited by 20 publications

(9 citation statements)

References 49 publications

(59 reference statements)

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“…The pattern of Zn-CMK-1 shows ZnO and metallic Zn signals [36,37] because the reduction process was probably not complete. The absence of prominent reflections in this pattern indicates that no crystalline bulk material has been formed outside the pore system, and the Zn/ZnO clusters are confined mostly inside the nanostructured carbon [38], showing nanometric size and high dispersion as seen in Table II and TEM studies.…”

Section: Resultsmentioning

confidence: 90%

Preparation and characterization of activated CMK-1 with Zn and Ni species applied in hydrogen storage

Juárez

Gómez

Anunziata

2015

Int. J. Energy Res.

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SUMMARYThe aim of this work is to prepare CMK-1 modified with Zn and Ni in order to improve its capacity in hydrogen storage. The approach that we have followed includes synthesis of nanostructures with the experimental study of its adsorption capacity and storage properties. We have shown that CMK-1 ordered porous carbon modified with metals is a promising material for hydrogen storage. The incorporation of metals was performed by wetness impregnation. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller methods. The CMK-1 modified with Zn showed the highest H 2 uptake at 77 K and at low and high pressure (1.5 and 4.4 wt.% at 1 and 10 bar, respectively). The introduction of Ni into CMK-1 does not increase hydrogen storage capacity at low pressure. However, at a higher pressure (10 bars), Ni-CMK-1 displays improved results in hydrogen uptake compared with those of CMK-1 pristine, 2.4 and 2.1 wt.%, respectively.

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Section: Resultsmentioning

confidence: 90%

Preparation and characterization of activated CMK-1 with Zn and Ni species applied in hydrogen storage

Juárez

Gómez

Anunziata

2015

Int. J. Energy Res.

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“…The fact that this pattern exhibits no prominent reflections is an indicator that no crystalline bulk material was formed outside the pore system. The Zn/ZnO clusters are confined for the most part in the nanostructured carbon [23], showing nanometric size and high dispersion which can be seen in Table 1 and TEM studies. The XRD pattern of Ni-CMK-1 (Figure 5) shows intensive peaks at 2θ = 44.5, 51.8, and 76.3°, corresponding to metallic Ni diffraction planes [1 1 1], [2 0 0], and [2 2 0], [45].…”

Section: (Nm) D (Nm)mentioning

confidence: 83%

“…The final sample of Pt-CMK-3 pattern displays metallic platinum peaks [25], pointing to a welldeveloped reduction process. In the case of Pt clusters, the absence of prominent reflections indicates that no crystalline bulk material formation had occurred outside the pore system [23], with nanometric size and high dispersion (very broad XRD signal of Pt, Figure 6) as shown in Table 2. The reason for this may be found in a relatively low scattering contrast between the pores and the walls of the mesoporous materials caused by the formation of reduced platinum which indicates fine dispersion on CMK-3 with a narrow size distribution [24].…”

Section: Sba-15 [H K L] Cmk-3 [H K L] a 0 (Nm)mentioning

confidence: 99%

“…The pattern of TiO 2 -CMK-3 shows characteristic signals of TiO 2 in anatase phase [26], indicating a particularly good synthesis process. The absence of prominent reflections in TiO 2 clusters indicates that no crystalline bulk material has been formed [23], with nanometric size and high dispersion (very broad XRD TiO 2 signals, Figure 7). This can be ascribed to a relatively low scattering contrast between the pores and walls of mesoporous materials, due to the formation of anatase nanoclusters that depict fine dispersion on CMK-3 with a narrow size distribution [24].…”

Section: Sba-15 [H K L] Cmk-3 [H K L] a 0 (Nm)mentioning

confidence: 99%

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Synthesis and Characterization of CMK Porous Carbons Modified with Metals Applied to Hydrogen Uptake and Storage

Costa¹,

Juárez²,

Anunziata³

2016

Microporous and Mesoporous Materials

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In this chapter, we have shown that hopeful hydrogen storage material can be obtained by ordered mesoporous carbons (carbons mesostructured from Korea, CMK-1 and CMK-3) and modified with metal/cations species. The pristine CMK-1 and CMK-3 were synthesized by replication using MCM-48 and SBA-15 as hard templates and sucrose as a carbon source. Incorporation of metal species was carried out by wetness impregnation. The mesoporous materials modified were characterized by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), RAMAN, transmission electron microscopy (TEM), and adsorption/desorption N 2 isotherms. Carbon modified with metal/cations shows a better capacity for hydrogen uptake than that of the mesoporous carbons. The evolution of high-pressure hydrogen adsorption measured at 77 K shows that composites can significantly enhance hydrogen adsorption capacity and hydrogen storage performance of carbon materials, proving to be prospective candidates for application in hydrogen storage. The improved activity and the larger performance of composite materials are attributed to improved dispersion of uniform metal/cations nanoparticles as well as to efficient use of the support, which may originate a high-surface area and pore volume, allowing a large dispersion of clusters.

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“…The pattern of Pt-CMK-3 shows metallic Pt signals [38], indicating a quite well reduction process. The absence of prominent reflections in case of Pt clusters indicates that no crystalline bulk material has been formed outside the pore system [42], with nanometric size and high dispersion (very broad XRD signal of Pt, Figure 2) as it can be seen in Table II. This can be ascribed to a relatively low scattering contrast between the pores and the walls of the mesoporous materials due to the formation of reduced platinum that depicts fine dispersion on CMK-3 with a narrow size distribution (Table II) [43].…”

Section: Morphological Studies Of Samplesmentioning

confidence: 95%

Synthesis and characterization of Pt-CMK-3 hybrid nanocomposite for hydrogen storage

Juárez

Costa

Anunziata

2014

Int. J. Energy Res.

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SUMMARY The nanometric carbon CMK‐3 modified with Pt was synthesized and applied as a reservoir for hydrogen uptake. We found that the newly synthesized hybrid composites exhibited significantly enhanced H2 storage. The approach that we have followed includes synthesis of nanostructures with the experimental study of its adsorption capacity and storage properties. In summary, we have shown that CMK‐3 ordered porous carbon modified with Pt nanoclusters is a promising material for hydrogen uptake. The samples were characterized by X‐ray diffraction, N2 isotherms, X‐ray photoelectron spectra and transmission electron microscopy. The nanoparticles of Pt (~1.7 nm) incorporated onto the nanostructured carbon CMK‐3 showed higher hydrogen uptake at low and high pressures (3.3 wt% of H2 sorption at 10 bar and 77 K) than CMK‐3. Copyright © 2014 John Wiley & Sons, Ltd.

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Synthesis and characterization of conducting polypyrrole/SBA-3 and polypyrrole/Na–AlSBA-3 composites

Cited by 20 publications

References 49 publications

Preparation and characterization of activated CMK-1 with Zn and Ni species applied in hydrogen storage

Preparation and characterization of activated CMK-1 with Zn and Ni species applied in hydrogen storage

Synthesis and Characterization of CMK Porous Carbons Modified with Metals Applied to Hydrogen Uptake and Storage

Synthesis and characterization of Pt-CMK-3 hybrid nanocomposite for hydrogen storage

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