synthesis of supported pt alloy three dimensional rhombus shapes nanoparticles for oxygen reduction reaction

Authors

mehran javanbakht

elaheh lohrasbi

sayed ahmad mozaffari

abstract

in this study ptfeco ternary alloys nanoparticles of three dimentional (3d) rhombus shapes dispersed on graphene nanosheets (ptfeco/gr) were successfully prepared and studied as electrocatalysts for oxygen reduction reaction (orr) in polymer-electrolyte fuel cells. a combination of analytical techniques including powder x-ray diffraction, x-ray photoelectron spectra, inductively coupled plasma-atomic emission spectrometry, scanning electron microscopy and electrochemical methods have been used for characterization of the synthesized electrocatalysts in this study. for comparison, the graphene supported ptfe catalyst (ptfe/gr), graphene supported ptco catalyst (ptco/gr) binary alloys and graphene supported pt catalyst (pt/gr) were also synthesized and investigated under the same experimental conditions. from the electrochemical analysis, it is found that ptfeco/gr particles exhibited an obvious enhancement of orr activity in comparison with pure pt and binary alloys. the significantly improved eas, orr activity and cell performance is achieved by increasing the utilization of ptcofe/gr electrocatalyst by increasing the three-phase boundary in the electrocatalyst layer.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Synthesis of Supported Pt Alloy three Dimensional Rhombus Shapes Nanoparticles for Oxygen Reduction Reaction

In this study PtFeCo ternary alloys nanoparticles of three dimentional (3D) rhombus shapes dispersed on graphene nanosheets (PtFeCo/Gr) were successfully prepared and studied as electrocatalysts for oxygen reduction reaction (ORR) in polymer-electrolyte fuel cells. A combination of analytical techniques including powder X-ray diffraction, X-ray photoelectron spectra, inductively coupled plasma-...

full text

Design of Pt-shell nanoparticles with alloy cores for the oxygen reduction reaction.

We report that the oxygen binding energy of alloy-core@Pt nanoparticles can be linearly tuned by varying the alloy-core composition. Using this tuning mechanism, we are able to predict optimal compositions for different alloy-core@Pt nanoparticles. Subsequent electrochemical measurements of ORR activities of AuPd@Pt dendrimer-encapsulated nanoparticles (DENs) are in a good agreement with the th...

full text

Oxygen reduction reaction on Pt/C at the presence of super paramagnetic of Fe3O4 nanoparticles for PEMFCs

In this paper the role of super paramagnetic iron oxide nanoparticles (SPI) on Platinum nanoclusters on activated carbon (Pt/C) for electrocatalytic oxygen reduction reaction was considered. Four composites of Pt/C and super paramagnetic iron oxide nanoparticles were prepared with the same total composites weight and different loading of Pt/C (1.2, 0.6, 0.4 and 0.3 mg ). The composite attached ...

full text

Metal Oxide/Pt Based Nanocomposites as Electrocatalysts for Oxygen Reduction Reaction

Fuel cell is a promising choice for clean energy because of its eco-friendly system, high energy conversion efficiency and high power density. Recently, much of the research work is focused on the system of combining metal oxides to increase the durability and surface area and to reduce the cost. In this study, among the various fabrication methods, we used the precipitation method to synthesis...

full text

Pt Monolayer Electrocatalyst for Oxygen Reduction Reaction on Pd-Cu Alloy: First-Principles Investigation

First principles approach is used to examine geometric and electronic structure of the catalyst concept aimed to improve activity and utilization of precious Pt metal for oxygen reduction reaction in fuel cells. The Pt monolayers on Pd skin and Pd1−xCux inner core for various compositions x were examined by building the appropriate models starting from Pd-Cu solid solution. We provided a detail...

full text

One –step synthesis of PdCo alloy nanoparticles decorated on reduced grahene oxide as an Electro-catalyst for Oxygen Reduction Reaction in Passive Direct Methanol Fuel Cells

We report a Pd-Co (3:1)/graphene oxide (Pd3Co /GO) catalyst through a one-step strategy. GO is synthesized from graphite electrodes using ionic liquid-assisted electrochemical exfoliation. Controllable GO-supported Pd3Co electrocatalystis then was reduced by ethylene glycol as a stabilizing agent to prepare highly dispersed PdCo nanoparticles on carbon graphene oxide to be used as oxygen reduct...

full text

My Resources

Save resource for easier access later


Journal title:
iranian journal of hydrogen & fuel cell

Publisher: iranian research organization for science and technology

ISSN 2383-160X

volume 2

issue 2 2016

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023