Synthesis and characterization of Pt nanoparticles on sulfur-modified carbon nanotubes for methanol oxidation

Ahmadi, Rezgar; Amini, Mohammad K.

doi:10.1016/j.ijhydene.2011.03.013

Cited by 70 publications

(41 citation statements)

References 50 publications

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“…6a, which is fitted with asymmetric peaks convoluted with Gaussian distribution [36]. The two relative intense doublet peaks with binding energies of 71.53 eV (Pt4f 7/2 ) and 74.86 eV (Pt4f 5/2 ) should be attributed to the metallic Pt [37], and the other two peaks at 72.38 and 75.81 eV can be assigned to Pt 2þ in PtO and Pt(OH) 2 -like species [38]. Therefore, it is suggested that the metallic Pt is the predominant species in the composites with a relative abundance of 60.13% of total Pt loading.…”

Section: Xps Analysismentioning

confidence: 99%

Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn3O4-modified multi-walled carbon nanotubes

Yang

Wang

Zhang

et al. 2012

International Journal of Hydrogen Energy

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Section: Xps Analysismentioning

confidence: 99%

Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn3O4-modified multi-walled carbon nanotubes

Yang

Wang

Zhang

et al. 2012

International Journal of Hydrogen Energy

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“…Moreover, the amount of hydrogenation active sites have an important effect on the catalytic activities of supported metal catalysts. As a consequence, we measured the number of hydrogenation active sites for the catalyst prepared with different amount of ethanol via [5,6,27,28]. And TOF of the catalyst show the same change trend with that of butanone conversion ( Figure 3B).…”

Section: Accepted Manuscriptmentioning

confidence: 82%

The action mechanism of ethanol in preparation of supported nano-sized Ru catalyst via supercritical fluid deposition

Zhang

Jiang

Wang

et al. 2014

Catalysis Communications

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“…A very high maximum power density of 595 mW cm -2 was observed for a low Pt loading of 0.04 mg cm -2 that was significantly higher than the Pt/Vulcan XC-72R-based conventional electrode (435 m Wcm -2 ) with equal Pt loadings. Pt nanoparticles supported on carbon nanotubes (Pt/CNTs) have been synthesized from sulfur-modified CNTs impregnated with H 2 PtCl 6 as Pt precursor [123]. The dispersion and size of Pt nanoparticles in the synthesized Pt/CNT nanocomposites are remarkably affected by the amount of sulfur modifier (S/CNT ratio).…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Carbon-Based Nanomaterials

Lavacchi

Vizza

2013

Nanostructure Science and Technology

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In fuel cells both the anode and cathode electrocatalysts are generally composed of nanosized metal particles which are supported on high surface area materials. The electrochemically active surface area (EASA), of catalysts used in low temperature fuel cells, such as polymer electrolyte membrane fuel cells (PEMFC, fed with hydrogen), direct alcohol fuel cells (DAFCs, alcohols: ethanol, methanol, polyalcohols), and direct formic acid fuel cells (DFAFC), has been found to be greatly enhanced when high surface area carbon-based materials are used as the support. As described in detail in Chap. 3, at the anode of a PEMFC dihydrogen is oxidized yielding protons and electrons. The protons pass through the cation exchange membrane toward the cathode where they are used in the reduction of oxygen to water together with the electrons arriving from the anode. The use of an anionexchange polymeric membrane as electrolyte, i.e., a membrane which allows only negative charges to pass, favors the production of negative ions, in this case OH -, in the process of oxygen reduction at the cathode, while the overall electrochemical process is left unvaried, as well as the reversible voltage of the cell. In PEMFCs, the polymeric electrolyte is generally Nafion Ò , a proton-exchange fluorinated membrane, about 50-200 lm thick. This withholds negatively charged ions (usually sulfonate groups -SO 3 -) covalently bonded to the polymeric backbone and therefore allows the passage of protons. Electrons are therefore forced to flow through the outer circuit. Nafion Ò , like other proton-exchange polymeric membranes, is most efficient when it works between 70 and 100°C, thus limiting the functionality of PEMFCs to low temperature operation.In DAFCs at the anode alcohols are oxidized to yield protons, electrons, and CO 2 or carboxylates, depending on the nature of the alcohol used as a fuel, while the cathode process is wholly similar to the one that takes place in PEMFCs.The most important component of a fuel cell is the membrane electrode assembly (MEA) that is composed of a catalytic layer where the electrochemical reactions occur, a diffusion layer providing access to the fuel and oxygen to the catalytic layer and a membrane where ions flow from one electrode to the other.

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Synthesis and characterization of Pt nanoparticles on sulfur-modified carbon nanotubes for methanol oxidation

Cited by 70 publications

References 50 publications

Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn3O4-modified multi-walled carbon nanotubes

Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn3O4-modified multi-walled carbon nanotubes

The action mechanism of ethanol in preparation of supported nano-sized Ru catalyst via supercritical fluid deposition

Carbon-Based Nanomaterials

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