Carbon nanotubes with Pt–Ru catalyst for methanol fuel cell

Frąckowiak, Elżbieta; Lota, Grzegorz; Cacciaguerra, Thomas; Béguin, François

doi:10.1016/j.elecom.2005.10.015

Cited by 125 publications

(33 citation statements)

References 21 publications

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“…The variation of potential indicates that the pulsed deposition is a linear diffusion process. [43] Accordingly, the ions may redistribute uniformly during the rest time between pulses of approximately 1 s Figure 1 b shows electrodeposited Pt spherocrystals (Sps) on top of the tubes. The sphere diameters are in the range of 500-1000 mm.…”

Section: Chemical Assembly and Characterization Of Pt And Pd Spherocrmentioning

confidence: 99%

“…In general, compared with monometallic catalysts, bimetallic catalysts often provide synergistic effects that can improve catalytic activity in electrochemical reactions [19] and efficiently avoid catalyst poisoning. [7,[41][42][43] Thus, when Pt-Pd binary catalysts are loaded into NTs, they may show better catalytic activity. According to the above guidlines, a highly dispersed bimetallic catalyst was synthesized by pulsed-current deposition (PCD) with the assistance of UC.…”

Section: Introductionmentioning

confidence: 99%

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High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO₂ Nanotubes

et al. 2010

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To obtain noble metal catalysts with high efficiency, long-term stability, and poison resistance, Pt and Pd are assembled in highly ordered and vertically aligned TiO(2) nanotubes (NTs) by means of the pulsed-current deposition (PCD) method with assistance of ultrasonication (UC). Here, Pd serves as a dispersant which prevents agglomeration of Pt. Thus Pt-Pd binary catalysts are embed into TiO(2) NTs array under UC in sunken patterns of composite spherocrystals (Sps). Owing to this synthesis method and restriction by the NTs, the these catalysts show improved dispersion, more catalytically active sites, and higher surface area. This nanotubular metallic support material with good physical and chemical stability prevents catalyst loss and poisoning. Compared with monometallic Pt and Pd, the sunken-structured Pt-Pd spherocrystal catalyst exhibits better catalytic activity and poison resistance in electrocatalytic methanol oxidation because of its excellent dispersion. The catalytic current density is enhanced by about 15 and 310 times relative to monometallic Pt and Pd, respectively. The poison resistance of the Pt-Pd catalyst was 1.5 times higher than that of Pt and Pd, and they show high electrochemical stability with a stable current enduring for more than 2100 s. Thus, the TiO(2) NTs on a Ti substrate serve as an excellent support material for the loading and dispersion of noble metal catalysts.

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Section: Chemical Assembly and Characterization Of Pt And Pd Spherocrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO₂ Nanotubes

et al. 2010

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“…etc). Moreover, it was reported that Pt-based materials have high tendency to poisoning by CO or CHO species which is considered another real problem [1][2][3]. Therefore, many efforts are going on to produce effective non precious electocatalysts to replace the Ptbased materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nitrogen doping on the Catalytic Activity of Ni-incorporated Carbon Nanofibers for Alkaline Direct Methanol Fuel Cells

Thamer

El‐Newehy

Barakat

et al. 2014

Electrochimica Acta

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“…Vulcan XC-72) were almost exclusively used as catalyst supports in low temperature fuel cells because of its low cost and high availability [8]. To improve the electrochemical activity and stability of the catalyst further, many new carbon materials such as graphite nanofibers [9][10][11][12], carbon nanocoils [13,14], carbon nanotubes (CNTs) [1,15,16] have recently been tested as supports for fuel cells catalysts. Compared to carbon blacks, these new carbon materials are different both at nanoscopic level in terms of their structural conformation (for example nanotubes) and pore texture (for example meso pore carbons) and/or at the macroscopic level in terms of their form (for example microspheres).…”

Section: Introductionmentioning

confidence: 99%

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Singh¹

2010

TOCATJ

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Binary nano-composites of Pt and nano-carbon (NC) and Pt and multiwalled carbon nanotube (MWCNT) have been prepared with varied compositions ranging between 20 and 80wt% Pt and investigated them as electrocatalysts for methanol oxidation. The study shows that with the increase in wt% of NC, the apparent electro-catalytic activity of the composite catalyst increases initially, reaches maximum at about 40wt% NC and decreases thereafter. However, the anodic peak current value, estimated as per mg of Pt present in the composite, increases gradually with increasing wt% of NC in the composite. The electrochemical active surface area (EASA) value for Pt in the composite electrode also increases with increasing the carbon composition in the composite. Almost similar effect of the MWCNT addition on the electro-catalytic activity is also observed in the case of Pt-MWCNT composite. Results have shown that an incorporation of carbon (NC/MWCNT) improves both the geometrical as well as the electronic properties of Pt.

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Carbon nanotubes with Pt–Ru catalyst for methanol fuel cell

Cited by 125 publications

References 21 publications

High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO₂ Nanotubes

High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO₂ Nanotubes

Influence of Nitrogen doping on the Catalytic Activity of Ni-incorporated Carbon Nanofibers for Alkaline Direct Methanol Fuel Cells

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

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Carbon nanotubes with Pt–Ru catalyst for methanol fuel cell

Cited by 125 publications

References 21 publications

High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO2 Nanotubes

High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO2 Nanotubes

Influence of Nitrogen doping on the Catalytic Activity of Ni-incorporated Carbon Nanofibers for Alkaline Direct Methanol Fuel Cells

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

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High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO₂ Nanotubes

High Electrocatalytic Activity of Pt–Pd Binary Spherocrystals Chemically Assembled in Vertically Aligned TiO₂ Nanotubes