A microwave reduction route was employed for the synthesis of Pt nanoparticles supported on multi-walled carbon nanotubes (MWCNT). The as-prepared Pt-MWCNT electrocatalysts were characterized by FT-IR, XRD and TEM analysis. Further, the as-prepared catalysts were probed for its electrocatalytic activity towards methanol oxidation by cyclic voltammetry (CV) in 0.5 M CH3OH + 0.5 M H2SO4 solution. Two kinds of electrocatalysts viz. Pt-MWCNT and Pt-MWCNT/PANI were probed to study the effect of both carbon nanotubes and polyaniline (PANI) towards methanol oxidation. The effect of scan rate, concentration and long-term cycle stability analysis has been investigated in detail. Results show that the presence of MWCNT and PANI improves the electrocatalytic efficiency towards methanol oxidation. Pt-MWCNT/PANI shows high peak current density towards methanol oxidation and good long-term stability even after 600 cycles indicating that the catalyst could be used for practical applications. © 2012, The Author(s).

Nirmala Grace A

Centre for Nanotechnology Research

Vellore Campus

A muneendra prasad

C santhosh

Fulltext

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Applied Nanoscience

Graphene found to be one of the best alternative to carbon nanotubes due to its superior properties and distinctive nanostructure. Graphene supported palladium electrocatalysts (Pd/G) is prepared using a facile microwave reduction method; which assists reduction of graphene oxide and further leads to formation of palladium nanoparticles. The structural characteristics of the prepared materials are characterized using FE-SEM, EDAX, XRD, FTIR spectroscopy and Raman spectroscopy. Electrocatalytic activity of the prepared electrocatalysts with respect to Methanol Oxidation Reaction (MOR) is analyzed using cyclic voltammetry. In addition, Vulcan carbon supported palladium electrocatlyst (Pd/G) is also prepared via same method for the evaluation of Pd/G. Further, electrocatalytic performance of prepared materials is investigated. Experiments are also carried out at different loading of palladium onto graphene matrix. This prepared graphene supported electrocatalysts having high electrocatalytic can be considered to be a better substitute for fuel cells anode material. © 2014 IEEE.

2014 International Conference on Advances in Electrical Engineering (ICAEE)

Preparation and characterization of graphene supported palladium nanoparticles for Direct Methanol Fuel Cells

Polymer Reviews

Synthesis, Preparation, and Performance of Blends and Composites of Ï€-Conjugated Polymers and their Copolymers in DMFCs

pi-conjugated aromatic polymers (pi-CPs) are a class of high performance materials used in fabrication of a number of devices. Their use in direct methanol fuel cells (DMFCs) has resulted in improving the performance of this prospective alternative energy harnessing device. This review focuses on these aspects of pi-CPs, from fabrication techniques to structure-property relationships and finally performance evaluation and comparison with other potential candidates. Along with an overview of the step-by-step progress that has been made in the last two decades, this review consists of a separate section dedicated to the advancements made in the last five years. This period has seen considerable progress in terms of preparation techniques, such as fabrication of layer-by-layer assembly and core-shell assembly; materials used, such as variety of dopants for pi-CPs and sulfonated polymers in case of PEMs and pi-CP composites with carbon nanotubes and graphenes in case of catalyst supporting matrices; and surface morphology, such as use of nanofibers, nanotubes, and nanowires. In addition, different polymerization strategies and solubility aspects of pi-CPs have also been discussed. All these modifications have resulted in yielding high power and current densities, mass specific activity, stability, durability, and judicious utilization of costly materials, like Pt and Nafion.

Synthesis, Preparation, and Performance of Blends and Composites of pi-Conjugated Polymers and their Copolymers in DMFCs

A potent catalyst has been prepared consisting of platinum (Pt), and platinum-palladium (Pt-Pd) nanoparticles supported on purified single-walled carbon nanotubes (Pt/CNT and Pt-Pd/CNT). Electrochemical characteristics of formic acid and formaldehyde oxidation on these catalysts are investigated via cyclic voltammetric analysis in mixed 0.5 M HCOOH (or 0.5 M HCHO) and 0.5 M H2SO4 solutions. The results imply that the Pt-Pd/CNT electrodes exhibit a better activity than the corresponding Pt nanoparticles modified SWCNT electrodes. The modified electrode exhibits significant electrocatalytic activity towards formic acid and formaldehyde oxidation, which may be attributed due to the uniform dispersion of nanoparticles on SWCNTs and the efficacy of Pd species in Pt-Pd system. Such nanoparticles modified CNT electrodes exhibit better catalytic behavior towards formic acid and formaldehyde than the corresponding carbon electrodes, indicating that the system studied in the present work is the more promising system for use in fuel cells. © 2009.

Journal of Colloid and Interface Science

Electrocatalytic oxidation of formic acid and formaldehyde on nanoparticle decorated single walled carbon nanotubes

Conductive Polymers

Electrochimica Acta

Structural assembly effects of Pt nanoparticle–carbon nanotube–polyaniline nanocomposites on the enhancement of biohydrogen fuel cell performance

Alternative platinum electrocatalyst supporter with micro/nanostructured polyaniline for direct methanol fuel cell applications

Applied Catalysis B: Environmental

Composite materials: An emerging class of fuel cell catalyst supports

Carbon nanotubes and polyaniline supported Pt nanoparticles for methanol oxidation towards DMFC applications

Journal	Data powered by TypesetApplied Nanoscience
Publisher	Data powered by TypesetSpringer Science and Business Media LLC
ISSN	2190-5509
Open Access	No