Activated carbon supported Pt catalysts: effect of support texture and metal precursor on activity of acetone hydrogenation

Fuente, A. Montoya de la; Pulgar, G.; González, Fernando; Pesquera, C.; Blanco, C.

doi:10.1016/s0926-860x(00)00699-2

Cited by 75 publications

(44 citation statements)

References 35 publications

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“…Single-walled and multiwalled carbon nanotubes (CNTs) [7] can improve the catalytic activity of Pt and effectively prevent catalyst aggregation, [8][9][10][11][12][13][14][15] compared with traditional carbon supports. [16][17][18] However, CNTs are unordered and complicated pretreatment is needed. In addition, due to the poor surface stability of carbon-based support materials, catalyst may be lost or poisoned by intermediate species in long-term operation.…”

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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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: 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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“…Activated carbons with highly developed surface area are widely used in numerous fields, such as separation and purification of liquids and gases, protection from toxic substances, catalysts, and catalyst support [1][2][3][4][5][6][7]. With the development of technology, the applications of activated carbons are also expanded, such as super-capacitors, electrodes, gas storage, and so on [8][9][10], which require the activated carbons containing a higher surface area.…”

Section: Introductionmentioning

confidence: 99%

Preparation of activated carbons by microwave heating KOH activation

Zhu

et al. 2007

Applied Surface Science

196

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“…The slurry formed was stirred for 48 h at room temperature. The oxidized samples (hereafter called S2 or S3, respectively) were washed with distilled water and dried under air at 383 K. The specific surface area of the supports was determined by the BET method using physical adsorption of nitrogen at 77 K. The amount of surface acidic groups was determined by acid-base titration [11].…”

Section: Methodsmentioning

confidence: 99%

Adsorption of PtCl62- anions on the surface of carbon black

Jia

Wang

2006

React Kinet Catal Lett

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Adsorption of PtCl 62-anions on surface of carbon black was studied. It was found that the absence of surface oxygen groups led to a higher Pt loading amount, and the Pt loading amount would decrease as using a higher H 2 PtCl 6 impregnating solution concentration. The π sites in the basal planes of carbon black surface act as the chemical adsorption sites, playing a more important role than surface oxygen groups in PtCl 6 2-adsorption. Adsorption of large amounts of H 3 O + in the π sites would lead to a decrease of chemical adsorption capacity.

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Activated carbon supported Pt catalysts: effect of support texture and metal precursor on activity of acetone hydrogenation

Cited by 75 publications

References 35 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

Preparation of activated carbons by microwave heating KOH activation

Adsorption of PtCl62- anions on the surface of carbon black

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Activated carbon supported Pt catalysts: effect of support texture and metal precursor on activity of acetone hydrogenation

Cited by 75 publications

References 35 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

Preparation of activated carbons by microwave heating KOH activation

Adsorption of PtCl62- anions on the surface of carbon black

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Product

Resources

About

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