An innovative catalyst of nickel-palladium alloy nanocrystals embedded nitrogen-doped graphene for efficient oxygen reduction reaction

A novel hybrid based on non-precious metal catalysts embedded into nitrogen doped graphene nanosheets was developed for oxygen reduction reaction (ORR) by pyrolyzing a mixture of Ni, Pd salts, nitrogen source, and graphene oxide. Scanning electron microscopy, transmission electron microscopy, Raman...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2019-08, Vol.797, p.314-324
Main Authors: Thi, M.L.N., Tran, T.H., Anh, P.D. Hai, Nhac-Vu, H.-T., Bui, Q.B.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Core-shell structure
Electrocatalysts
Encapsulation
Graphene
Microscopy
Nanocrystals
Nanoparticles
Nickel
Nickel-palladium alloy
Nitrogen
Nitrogen-doped graphene
Oxygen reduction reaction
Oxygen reduction reactions
Palladium
Palladium base alloys
Photoelectrons
Platinum
Raman spectra
Scanning electron microscopy
Spectrum analysis
Transmission electron microscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel hybrid based on non-precious metal catalysts embedded into nitrogen doped graphene nanosheets was developed for oxygen reduction reaction (ORR) by pyrolyzing a mixture of Ni, Pd salts, nitrogen source, and graphene oxide. Scanning electron microscopy, transmission electron microscopy, Raman spectra, and X-ray photoelectron spectroscopy analyses indicated the binary NiPd nanoparticles good dispersed on nitrogen-doped graphene sheet (NiPd NPs/N-GR) under a unique core-shell nanostructure with high interaction, thereby creating massive catalytic sites and boosting the activity towards ORR in alkaline medium. The electrochemical measurements showed the onset and half-wave potential of the NiPd NPs/N-GR were +0.961 and + 0.82 V, respectively, indicating a comparable catalytic behavior to a commercial Pt/C product (20 wt%). In addition, such catalyst also exhibited superior stability and methanol tolerance ability to Pt/C. The achieved superiorities of the NiPd NPs/N-GR imply that this material is potential to replace Pt-based catalysts in for ORR applications. [Display omitted] •Hybrid of NiPd NPs encapsulated nitrogen-doped graphene is facilely prepared.•Hybrid offers high catalytic activity towards ORR in alkaline medium.•The synergistic effect of between individual components improves ORR performance.•Hybrid has relative activity but better stability and methanol tolerance than Pt/C.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.05.119