Preparation and catalytic activity of Pt/C materials via microwave irradiation

Wang, Hong‐Wen; Dong, Rui‐Xuan; Chang, Hsin‐Yu; Liu, Ching‐Lin; Chen-Yang, Y. W.

doi:10.1016/j.matlet.2006.05.067

Cited by 19 publications

(6 citation statements)

References 14 publications

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“…When the results were examined, an increase in crystal size was observed when the microwave time increased. This situation was similar to the results given in the literature . Furthermore, while Bayrakçeken and colleagues calculated the crystal size as 4.60 nm in the synthesis made with 60 seconds microwave duration, it was calculated as 4.87 nm for the same microwave duration in this study.…”

Section: Resultssupporting

confidence: 91%

“…This situation was similar to the results given in the literature. 43,44 Furthermore, while Bayrakçeken and colleagues 43 calculated the crystal size as 4.60 nm in the synthesis made with 60 seconds microwave duration, it was calculated as 4.87 nm for the same microwave duration in this study. There are many factors affecting the activity and durability of fuel cells; the crystal size is one of the most critical factors.…”

Section: Structural Characterizationmentioning

confidence: 53%

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Performance of an HT‐PEMFC having a catalyst with graphene and multiwalled carbon nanotube support

2019

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Summary In this study, the effect of multiwalled carbon nanotube and graphene nanoplatelet‐based catalyst supports on the performance of reformate gas‐fed polybenzimidazole (PBI)‐based high‐temperature proton exchange membrane fuel cell (HT‐PEMFC) was investigated. In addition, the effect of several microwave conditions on the performance of the Pt‐Ru/multiwalled carbon nanotube (MWCNT)–graphene nanoplatelet (GNP) catalyst was assessed. Through X‐ray diffraction, thermal gravimetric analysis, transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy, the catalysts' chemical structure and morphology were characterized. Cyclic voltammetry analysis was used for the electrochemical characterization of catalysts through an electrochemical cell with three electrodes connected to a potentiostat. The results showed that the best performing catalyst is the catalyst produced using 800‐W power for 40 seconds. The electrochemically active surface area values of this catalyst ranged from 54 to 45 m2/g. Single‐cell performance tests of the HT‐PEMFC were then carried out. In these tests, reformate gas mixture, consisting of H2, CO2, and CO, was fed to the anode side at 160°C without humidification. These tests for the best performing catalyst yielded peak power density of 0.280 W/cm2 and current density (at 0.6 V) of 0.180 A/cm2 in the H2/air environment and peak power density of 0.266 W/cm2 and current density (at 0.6 V) of 0.171 A/cm2 in the reformate gas/air environment. As a result of the experiments, it was found that Pt‐Ru/MWCNT‐GNP hybrid material is a suitable catalyst for HT‐PEMFC.

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Section: Resultssupporting

confidence: 91%

Section: Structural Characterizationmentioning

confidence: 53%

Performance of an HT‐PEMFC having a catalyst with graphene and multiwalled carbon nanotube support

2019

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“…One of the methods used in this study is microwave irradiation technique. Microwave irradiation technique has been used as a method for catalyst preparation due to its fast, uniform, homogenous and instant heating environment, which led to fast reduction and facilitate the nucleation of metal particles [22]. In most of the reports microwave heating has been applied to reduce reaction times, increase product yields and enhance product purities by reducing unwanted side reactions compared to conventional heating methods.…”

Section: Introductionmentioning

confidence: 99%

“…Due to short reaction time associated with microwave synthesis it could be ideal for reaction scouting and optimization of reaction conditions and as much as new experiments can be conducted in a short time. Wang et al [22] have executed a simple microwave procedure for preparing Pt metal nanoparticles supported on carbon. The prepared Pt/Carbon nanocomposites containing 20 wt%Pt successfully achieved by microwave irradiation.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon ratio in the polypyrrole/carbon composite catalyst support on PEM fuel cell performance

Daş

Yurtcan

2016

International Journal of Hydrogen Energy

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“…Aside from the conventional methods discussed previously, there are many researchers who have devoted their efforts on the microwave-assisted heating method to synthesize Pt nanoparticles on all types of support. [28][29][30][31][32][33][34][35][36][37] The size and size distribution of Pt nanoparticles have been reported to be well controlled, but the dispersion density and loading amount on CNTs are still low (<20 wt %) compared with those obtained by conventional methods. And, most of their reports did not discuss the effect of temperature on Pt loading amount in the microwave heating methods; only the reaction time were recorded.…”

Section: Xps Analyses Of Chemical Statementioning

confidence: 99%

Rapid and Homogeneous Dispersion of Pt Catalyst Particles on Multi-Walled Carbon Nanotubes by Temperature-Controlled Microwave Polyol Method

Chen

et al. 2008

jjap

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Fuel cells, particularly direct methanol fuel cells (DMFCs), have great potential as mobile power sources. It has been extensively reported that the DMFC performance strongly depends on the electrode catalyst, and many research groups have focused on the preparation of high efficiency cathode catalysts using all types of metal nanoparticle and support. However, most of these methods are either time-consuming with multiple-steps or there is low loading of the nanocatalyst dispersed on the supports. In this study, platinum nanoparticles of uniform diameter (approximately 4.3 nm) were efficiently dispersed on multi-walled carbon nanotubes (MWCNTs) by the temperature-controlled, microwave-assisted polyol method with the addition of sodium dodecyl sulfate (SDS) and [poly(vinyl pyrrolidone)] (PVP). The addition of SDS and PVP in chloroplatinic acid/ethylene glycol (EG) solution can cause the efficient and homogeneous dispersion of the catalyst particles on MWCNTs, enhance the adsorption of platinum particles, and reduce the residue of platinum particles. Moreover, temperature was determined to be the most important factor affecting the reduction of Pt in the process, and large amounts of Pt particles were characterized when the temperature ranged from 140 to 160 C. The results indicate that the optimum temperature ranges from 140 to 160 C, and that the loading amount of Pt/CNTs can reach more than 50 wt % in only 90 s of processing time. The significant improvements in dispersion and loading are due to the ability of SDS, to wrap the PVPstabilized Pt nanoparticles around the surface of the carbon nanotubes. The characterization analyses were conducted by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), and thermal gravimetric analysis (TGA).

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Preparation and catalytic activity of Pt/C materials via microwave irradiation

Cited by 19 publications

References 14 publications

Performance of an HT‐PEMFC having a catalyst with graphene and multiwalled carbon nanotube support

Performance of an HT‐PEMFC having a catalyst with graphene and multiwalled carbon nanotube support

Effect of carbon ratio in the polypyrrole/carbon composite catalyst support on PEM fuel cell performance

Rapid and Homogeneous Dispersion of Pt Catalyst Particles on Multi-Walled Carbon Nanotubes by Temperature-Controlled Microwave Polyol Method

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