2006
DOI: 10.1021/jp0567063
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Abstract: The activity of the methanol oxidation reaction of a multiwalled carbon nanotube (MWCNT)-supported PtRu catalyst was investigated and compared with the Vulcan XC-72 carbon-supported catalyst. The PtRu nanoparticles with 1:1 and 7:3 atomic ratios (with similar PtRu loadings and morphological structures) were deposited both on the MWCNTs and on the carbon. Cyclicvoltammetry results demonstrated that the MWCNT-supported PtRu catalyst exhibited a higher mass activity (mA mg(-1) of PtRu) for the methanol oxidation … Show more

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Cited by 283 publications
(162 citation statements)
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“…[1][2][3][4][5] The larger surface areas and high electric conductivity render them as ideal supporting materials for metal nanoparticle catalysts such as Ag, Au, Pt, and Pd nanoparticles, which have shown great promise in catalysis, [6] surface-enhanced Raman scattering (SERS), [7] and electrochemical and fuel cells. [8][9][10][11][12] CNTs are also templates for attaching metal nanoparticles and nanoparticle-fused metal nanowires for hydrogen storage and for chemical and biological sensing applications; [13][14][15] Single walled carbon nanotubes (SWNTs) decorated with more than eighteen metals for the detection of several gases such as H 2 , CH 4 , CO, and H 2 S have been reported. [16] Several approaches have been attempted to prepare CNT-metal nanoparticle composites that include spontaneous reduction, [2,17] electrochemical reduction, [18,19] citrate reduction [20] galvanic displacement reaction, [21] nanoparticle decoration on chemically oxidized CNT side walls, [22,23] and MW-assisted functionalization.…”
Section: Introductionmentioning
confidence: 99%
“…[1][2][3][4][5] The larger surface areas and high electric conductivity render them as ideal supporting materials for metal nanoparticle catalysts such as Ag, Au, Pt, and Pd nanoparticles, which have shown great promise in catalysis, [6] surface-enhanced Raman scattering (SERS), [7] and electrochemical and fuel cells. [8][9][10][11][12] CNTs are also templates for attaching metal nanoparticles and nanoparticle-fused metal nanowires for hydrogen storage and for chemical and biological sensing applications; [13][14][15] Single walled carbon nanotubes (SWNTs) decorated with more than eighteen metals for the detection of several gases such as H 2 , CH 4 , CO, and H 2 S have been reported. [16] Several approaches have been attempted to prepare CNT-metal nanoparticle composites that include spontaneous reduction, [2,17] electrochemical reduction, [18,19] citrate reduction [20] galvanic displacement reaction, [21] nanoparticle decoration on chemically oxidized CNT side walls, [22,23] and MW-assisted functionalization.…”
Section: Introductionmentioning
confidence: 99%
“…4c in 0.5 M H 2 SO 4 solution containing methanol for 1000 s, were carried at a constant potential of 0.6 V vs. Ag/AgCl. In the initial time period the potentiostatic current density decreases rapidly for all the PtRu catalysts, which could be due to the formation intermediate species, such as CO ads , CH 3 OH ads , and CHO ads , during the methanol oxidation reaction [30]. At longer time periods although the current gradually decays for both catalysts, the PtRu/ SeeC catalysts maintain a higher current density than the PtRu/C catalyst throughout all ranges up to 1000 s. The much higher tolerance of the PtRu/SeeC catalyst can be attributed to the change of electronic structure induced by the presence of Se.…”
Section: Resultsmentioning
confidence: 98%
“…Matsumoto et al, 2004aT. Matsumoto et al, , 2004bPrabhuram et al, 2006;Saha et al, 2008;, it is generally believed that the performance of a CNT-based MEA is better than that of conventional metal/supports MEA (T. Matsumoto et al, 2004aMatsumoto et al, , 2004bPrabhuram et al, 2006;Saha et al, 2008;. Although the detailed mechanism how the CNTs affect the catalytic activity of the metal/CNTs are still not well understood, it is generally believed that the enhancement of the electro-catalytic activity of the metal/CNT composites may arise from the following reasons: 1.…”
Section: Performance Of Metal/cnt Based Meamentioning
confidence: 99%
“…Currently, the most widely used catalysts in the PEMFCs are metal nanoparticles (NPs), mainly Pt and/or Pt based alloys (W.Z. Li et al, 2002Prabhuram et al, 2006;. These metal NPs are usually characterized with high activities in oxygen reduction and/or fuel oxidation reaction due to their high surface to volume ratio and improved Fermi levels for redox reactions (W.Z.…”
Section: Introductionmentioning
confidence: 99%