Facile synthesis of poly(amidoamine)-modified carbon nanospheres supported Pt nanoparticles for direct methanol fuel cells

Huang, Yingqiang; Huang, Haoliang; Liu, Yingju; Xie, Yibing; Liang, Zhurong; Liu, Chuanhe

doi:10.1016/j.jpowsour.2011.10.112

Cited by 33 publications

(27 citation statements)

References 39 publications

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“…5a. The ECSA value of the electrocatalysts were calculated from the hydrogen adsorption area using the following equation [2,16]: To investigate the increased electrocatalytic activity and demonstrate the efficient role of the two-dimensional sandwich-like nanostructure, all electrocatalysts for methanol oxidation were studied in a N 2 -saturated 0.1 M H 2 SO 4 + 2 M CH 3 OH solution at a scan rate of 50 mVÁs À1 . As shown in Fig.…”

Section: Electrochemical Characterization Of the Electrocatalystsmentioning

confidence: 99%

“…However, challenging issues including low catalytic activity of the anodic catalyst, high cost of the Pt-based electrocatalyst, and the poisoning of Pt by CO-like species during methanol oxidation are the main obstacles to the commercialization of DMFC technology. In order to enhance the activities of electrocatalysts and decrease the usage of Pt-based electrocatalysts, various nanostructured carbon materials have been used to effectively disperse metal nanoparticles [2][3][4]. Among them, graphene or reduced graphene oxide (RGO) attracts particular interest by its exceptional electrical conductivity, large surface area and great chemical stability [5].…”

Section: Introductionmentioning

confidence: 99%

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Electroless synthesis of two-dimensional sandwich-like Pt/Mn3O4/reduced-graphene-oxide nanocomposites with enhanced electrochemical performance for methanol oxidation

Huang

Gao

et al. 2014

Electrochimica Acta

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Section: Electrochemical Characterization Of the Electrocatalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electroless synthesis of two-dimensional sandwich-like Pt/Mn3O4/reduced-graphene-oxide nanocomposites with enhanced electrochemical performance for methanol oxidation

Huang

Gao

et al. 2014

Electrochimica Acta

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“…Moreover, the multi-functional groups (branches) endow dendrimers with special properties. Dendrimers are used in drugs delivery and carriers [3][4][5][6] , fuel cells 7 , light-emitting diodes 8,9 , liquid crystals 10 and chemical modifications 11,12 , membrane separation 13 . In nowadays, most investigators have focused their attentions on the free dendrimers, while the properties and applications of other kinds of supported dendrimers are seldom reported.…”

Section: Introductionmentioning

confidence: 99%

Investigation about the copper adsorption on the chloropropylsilica gel surface modified with a nanostructured dendrimer DAB-Am-16: an analytical application for determination of copper in different samples

Carmo

Paim

2012

Mat. Res.

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The third generation (G-3) poly(propyleneimine)hexadecaamine dendrimer (DAB-Am-16) was grafted onto the chloropropylsilica gel surface (DPPIPS). The modified silica (DPPIPS) was characterized by Electronic (Uv-Vis), vibrational and Electron Paramagnetic Resonance (EPR), spectrocopies, surface area (331.07 m 2 .g -1) and porosity analyses (pore diameter of 41.9 nm) and cyclic voltammetry technique. The copper adsorption studies were performed using a batchwise process and the DPPIPS showed adsorption capacities of 16.3, 47.8 and 659.5 mol.g -1 in aqueous, ethanol and acetone medium, respectively, with recoveries close to 100% after percolation with HCl 1.0 mol.L -1 . The results suggest that the sorption of copper ions on DPPIPS occurs mainly by surface complexation and a Langmuir model allowed describing the sorption of the metal ions on DPPIPS. As an application of this chemically modified material, copper was determined in real samples of distilled spirits and fuel alcohol.

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“…It can be obviously seen from Figure 7 that there exist characteristic absorption peak at 3,500 cm -1 which is assigned to the stretching vibration of hydroxyl group [39]. The peak covering a wide range of 500-880 cm -1 is the Nb-O stretch region [40].…”

Section: Electrochemical Propertiesmentioning

confidence: 96%

Niobium Dioxide Facilitating Methanol Electrooxidation on Pt/C Catalyst by Synergistic Effect

Zhang

Gao

et al. 2013

Fuel Cells

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In this work, Pt nanoparticles are deposited on NbO2‐modified carbon composites and evaluated as promising direct methanol fuel cell (DMFC) electrocatalysts. Transmission electron microscopy (TEM) and X‐ray diffraction (XRD) indicate that Pt nanoparticles (about 2.5 nm) are uniformly dispersed on NbO2‐modified carbon composites. Electrochemical measurements show that the mass activity toward methanol electrooxidation on Pt/NbO2‐C is as high as 3.0 times that of conventional Pt/C. Meanwhile, the onset potential of CO oxidation is negatively shifted by about 46 mV as compared with that of Pt/C, which means that the synergistic effect between NbO2 and Pt facilitates the feasible removal of poisoning intermediate CO during methanol electrooxidation. X‐ray photoelectron spectroscopy (XPS) characterizations reveal the electron transfer from Nb to Pt, which suppress the poisoning CO adsorption on Pt nanoparticles and facilitate methanol electrooxidation. NbO2 nanoparticles facilitate methanol electrooxidation on Pt/C catalyst by synergistic effect and electronic effect, which represents a step in the right direction for the development of excellent fuel cell anode electrocatalysts.

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Facile synthesis of poly(amidoamine)-modified carbon nanospheres supported Pt nanoparticles for direct methanol fuel cells

Cited by 33 publications

References 39 publications

Electroless synthesis of two-dimensional sandwich-like Pt/Mn3O4/reduced-graphene-oxide nanocomposites with enhanced electrochemical performance for methanol oxidation

Electroless synthesis of two-dimensional sandwich-like Pt/Mn3O4/reduced-graphene-oxide nanocomposites with enhanced electrochemical performance for methanol oxidation

Investigation about the copper adsorption on the chloropropylsilica gel surface modified with a nanostructured dendrimer DAB-Am-16: an analytical application for determination of copper in different samples

Niobium Dioxide Facilitating Methanol Electrooxidation on Pt/C Catalyst by Synergistic Effect

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