Ultrasound-assisted synthesis of conducting polymer-based electrocatalysts for fuel cell applications

Kumar, P. Rathish; Suryawanshi, Prashant L.; Gumfekar, Sarang P.; Sonawane, Shirish H.

doi:10.1016/j.cep.2017.08.004

Cited by 17 publications

(14 citation statements)

References 45 publications

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“…The size of the catalyst is below 20 nm (as shown in Fig. 9) while the size of Pt-Co-Cabon/PANI support is below 50 nm (Rajesh Kumar et al 2017;Skorb and Andreeva 2013).…”

Section: Synthesis Of the Support And Catalyst Preparation For Pem Fuel Cellmentioning

confidence: 99%

“…During the synthesis K 2 PtCl 6 -and cobalt nitrate was used as precursors and it was reduced using the sodium borohydride. The Membrane electrolyte assembly was prepared using the commercial carbon black powder and using the PANI using the electrocatalyst (Rajesh Kumar et al 2017Kumar et al , 2018a.…”

Section: Synthesis Of the Support And Catalyst Preparation For Pem Fuel Cellmentioning

confidence: 99%

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Synthesis of Nanomaterials for Energy Generation and Storage Applications

Narsimha

Kumar

Pandiyan

et al. 2020

Green Energy and Technology

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A Polymer Electrolyte Membrane (PEM) fuel cell is a device in which an electrochemical reaction occurs between fuel and oxidant producing electricity and water is the only by-product with zero emission. Usually, Pt nanoparticles prepared on carbon support used as oxidation and reduction reaction in PEM fuel cells. Because, carbon-supported platinum shows better oxidation and reduction activity among all the pure metals. Alloying of Pt with another non-noble metal is a strategy to develop Pt-based electrocatalysts, which reduces the Pt loading in electrodes and alters the intrinsic properties such as active sites available on surface and binding strength and electronic effect of species. Carbon support loss its catalytic activity due to electrooxidation under fuel cell operating conditions for long-term operations. In particular, the encapsulation of carbon with polyaniline (PANI) supported Pt enhances the electrode stability in fuel cells by Enhancing the Active Surface Area (EASA), chemical resistance and electron conductivity. Different supported catalysts have been proposed to improve electrochemical stability of nanoparticles in PEM fuel cells and supercapacitor.

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“…The size of the catalyst is below 20 nm (as shown in Fig. 9) while the size of Pt-Co-Cabon/PANI support is below 50 nm (Rajesh Kumar et al 2017;Skorb and Andreeva 2013).…”

Section: Synthesis Of the Support And Catalyst Preparation For Pem Fuel Cellmentioning

confidence: 99%

Section: Synthesis Of the Support And Catalyst Preparation For Pem Fuel Cellmentioning

confidence: 99%

Synthesis of Nanomaterials for Energy Generation and Storage Applications

Narsimha

Kumar

Pandiyan

et al. 2020

Green Energy and Technology

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“…[9] In the study by Malta et al, ANi was polymerized in an aqueous solution of V 2 O 5 by ultrasound at room temperature and V 2 O 5 /PANi nanowires were obtained. [10] In later studies, PANi/Ag nanocomposite, [11] PANi as hollow microspheres, [12] PANi nanofiber [13] encapsulated with carbon, PANi, [14] cellulose/PANi composite [15] were obtained using ultrasound. Fukui et al, examined the effect of different frequencies applied to obtain PANi nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound and Pressure Assisted Solid‐State Polymerization of Carbazole

2023

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This study was carried out with the aim of obtaining polycarbazole (PCz) with solid-state polymerization by using ultrasound and pressure assisted methods. For ultrasoundassisted method (U), first, the optimum carbazole (Cz) and cerium ammonium nitrate (CAN) amounts, polymerization time, ultrasound application conditions were determined and then the polymers that are called "PCz-U#" were characterized by using scanning electron microscope (SEM), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), transmission electron microscobe (TEM), X-ray diffraction (XRD) and four-point prop conductivity measurements. The effect of the applied pressing time during preparation of pellet on the conductivity of PCz-U was also investigated. Pressureassisted polymerization (P) was carried out at these optimum conditions and the resulting polymer was called "PCz-P#".In order to understand the advantage of the ultrasound and pressure assisted methods, conventional polymerization in a solution was also performed at the optimum concentrations of Cz and CAN and the properties of PCz's obtained from three different methods were compared. The conductivities of PCz's obtained in a very short time such as one minute with the ultrasound and pressure assisted methods are at the same level as the conductivity of the polymer (∼ 10 À 4 S/cm) obtained by the solution method in 20 minutes using 16 and 35.6 times higher amounds of Cz and CAN, respectively. With this study, two new methods for PCz synthesis have been proposed, which are suitable for VOC limitation as no solvent is used in and environmentally friendly because less chemicals are used.

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“…During the sonication process, plenty of cavitation bubbles were generated and then collapsed in the liquid environment, the collapsed cavitation bubbles can result in instantaneous high temperature and high pressure, which make it possible to actuate certain physical/chemical reaction and obtain the nanomaterials with different morphology and composition [29] . For example, Ru nanoparticles decorated NiFe layered double hydroxide with excellent hydrogenation catalytic activity [30] , cyclodextrin metal–organic framework with superior antibacterial activity [31] , platinum-cobalt modified carbon-encapsulated polyaniline with substantial oxygen reduction reaction activity [32] and so on have been successfully obtained through ultrasound-assisted synthesis methods. In addition, according to our previous studies, ultrasound-assisted liquid-phase exfoliation approach could be also used for the preparation of high-quality pristine graphene by breaking the Van der Waals interactions between the layers of bulk graphite.…”

Section: Introductionmentioning

confidence: 99%