A simple method for the synthesis of PtRu nanoparticles on the multi-walled carbon nanotube for the anode of a DMFC

Prabhuram, Joghee; Zhao, Tianshou; Liang, Zhenxing; Chen, Rong

doi:10.1016/j.electacta.2006.09.027

Cited by 137 publications

(88 citation statements)

References 39 publications

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“…3f). The Pt binding energies of the PtRu/SeeC and PtRu/C samples shift to the higher energy as compared to those of Pt/C, which can be attributed to the stronger metal-to-support interaction and a smaller particle size [11,28]. The Pt binding energies of the PtRu/SeeC shift to the lower energy by ca.…”

Section: Resultsmentioning

confidence: 87%

Selenium functionalized carbon for high dispersion of platinum–ruthenium nanoparticles and its effect on the electrocatalytic oxidation of methanol

Wang

et al. 2013

Journal of Power Sources

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Wang, R. et al. (2013). Selenium functionalized carbon for high dispersion of platinumeruthenium nanoparticles and its effect on the electrocatalytic oxidation of methanol.Journal Abstract Using selenium functionalized carbon as supports, platinumeruthenium nanoparticles were highly dispersed on the carbon surface, and showed improved electrochemical properties for methanol electrooxidation. The method provides a new route for functionalization of the carbon surface on which to disperse noble metal nanoparticles for application as electrocatalysts in fuel cells.

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Section: Resultsmentioning

confidence: 87%

Selenium functionalized carbon for high dispersion of platinum–ruthenium nanoparticles and its effect on the electrocatalytic oxidation of methanol

Wang

et al. 2013

Journal of Power Sources

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“…However, this has not been widely investigated in the literature (Publications II, III and IV) [33,107,117] as most studies of different catalyst supports in a DMFC only report the performance [103][104][105][106][108][109][110][111][112][113][114][115][116]. In Publication IV, three…”

Section: Carbon Supportsmentioning

confidence: 99%

“…Although many of these alternative supports have been tested in DMFC [103][104][105][106][107][108][109][110][111][112][113][114][115][116][117], their long-term stability in DMFC conditions has not been studied widely though it is a significant reason for their research [33,118]. In light of this, Vulcan-, GNF-and FWCNT-PtRu were tested for a period of 3 days in a micro-DMFC anode in Publication IV.…”

Section: The Role Of Carbon Supportmentioning

confidence: 99%

Silicon nanograss as micro fuel cell gas diffusion layer

et al. 2010

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Direct methanol fuel cells (DMFC) produce electrical energy directly from chemical energy. They are a promising candidate for power sources of portable devices due to the high energy density of methanol and the quick recharging procedure by fuel insertion. However, the problem areas of the DMFC are the slow electro-oxidation of methanol and the permeated methanol reacting at the cathode. New catalysts are constantly searched but they are often tested only for catalytic activity and the DMFC testing is omitted even though the catalyst layer (CL) structure has a large impact on the performance. Miniaturization of the system is also necessary for portable applications. Silicon etching can be used to fabricate small structures for fuel cells replacing or enhancing the functions of laboratory-scale components.In the first part of this thesis, new catalysts for the DMFC are studied with the emphasis on the CL structure. Different carbon supports for the anode were studied: standard carbon black and alternative few-walled carbon nanotubes (FWCNT) and graphitized carbon nanofiber (GNF). The alternative supports showed better DMFC performance but their stability was lower than with carbon black. However, the CL formed with GNF showed a very porous structure enhancing the mass transfer, so that higher binder content could be used improving the stability to the level of carbon black and the performance by 30%. The FWCNTs were also investigated as a platform for enzymatic methanol oxidation by studying the electrochemical properties of an immobilized cofactor pyrroloquinoline quinone (PQQ). A large amount of PQQ was adsorbed having a strong redox response and good stability in a wide pH window. For the cathode, a methanol-tolerant, Pt-free nitrogen-doped FWCNTs were tested in an alkaline DMFC as such testing is not often made. Its performance was remarkably 4 times better than with Pt when synthetic air was used as the oxidant.In the second part of thesis, an integrated gas diffusion layer (GDL) consisting of Si nanoneedles (nanograss) was tested in a micro fuel cell (MFC). The layer functioned properly at low current densities. For high power applications, a standard carbon cloth GDL was tested with the nanograss as a contact surface reducing the resistance between the GDL and the flow field. The use of the nanograss improved the MFC performance and stability. Finally, the MFCs were used as a catalyst testing platform and the results were compared with a similar test in a laboratory-scale DMFC. The results varied showing that the DMFC components also have a large impact on catalyst testing.Keywords direct methanol fuel cell, carbon nanomaterials, micro fuel cells, catalyst layer Tiivistelmä Suorametanolipolttokennot (SMPK) tuottavat sähköenergiaa suoraan kemiallisesta energiasta. Ne ovat lupaava vaihtoehto kannettavien laitteiden voimanlähteeksi, koska metanolilla on korkea energiatiheys ja lataaminen tapahtuu nopeasti polttoainelisäyksellä. SMPK:lla on kuitenkin rajoitteina metanolin hidas hapetusreaktio ja katodi...

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“…It should be noted all the samples decrease greatly in the beginning period due to formation of intermediate carbonaceous species during methanol oxidation. 32,33 After 2 h testing, the current density at Pt 1 Ru 1 /MWCNTs is still as high as 75.7 mA mg À1 . As a comparison, the current densities of Pt 1 Ru 1 NPs and Pt/MWCNTs are 10.1 mA mg À1 and 18.2 mA mg À1 , respectively, demonstrating the functionalize support and bimetallic e®ect are bene¯cial for promoting the catalytic durability.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Bimetallic PtRu Nanoparticles Supported on Functionalized Multiwall Carbon Nanotubes as High Performance Electrocatalyst for Direct Methanol Fuel Cells

Tan

Sá

Cai

et al. 2016

NANO

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PtRu nanoparticles (NPs) supported on acid treated multiwall carbon nanotubes (Pt 1 Ru 1 / MWCNTs) were prepared by a modi¯ed polyol method without adding any other surfactant or protective agent. The structural and compositional properties of the as-obtained samples were characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), X-ray di®raction (XRD) and X-ray photoelectron (XPS) spectroscopy. The electrocatalytic performance of the catalyst was evaluated by cyclic voltammetry (CV), CO stripping voltammetry and chronoamperometry, indicating a high catalytic activity, excellent CO tolerance and stability for methanol oxidation. Interestingly, a series of accurate controllable experiments have been designed to explore the enhancement mechanism of Pt 1 Ru 1 /MWCNTs for methanol oxidation reaction. Most importantly, Pt 1 Ru 1 /MWCNTs composites were used as an anode catalyst in the direct methanol fuel cells (DMFCs) exhibiting outstanding power density (126.1 mW/cm 2 Þ 1.7 times higher than that of the commercial catalyst of Pt 1 Ru 1 /C (74.1 mW/cm 2 Þ (E-TEK).

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A simple method for the synthesis of PtRu nanoparticles on the multi-walled carbon nanotube for the anode of a DMFC

Cited by 137 publications

References 39 publications

Selenium functionalized carbon for high dispersion of platinum–ruthenium nanoparticles and its effect on the electrocatalytic oxidation of methanol

Selenium functionalized carbon for high dispersion of platinum–ruthenium nanoparticles and its effect on the electrocatalytic oxidation of methanol

Silicon nanograss as micro fuel cell gas diffusion layer

Bimetallic PtRu Nanoparticles Supported on Functionalized Multiwall Carbon Nanotubes as High Performance Electrocatalyst for Direct Methanol Fuel Cells

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