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Modification of TiO 2 Nanotubes with PtRu/Graphene Nanocomposites for Enhanced Oxygen Reduction Reaction
Author(s) -
Alammari Walaa,
Govindhan Maduraiveeran,
Chen Aicheng
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500295
Subject(s) - graphene , x ray photoelectron spectroscopy , nanocomposite , materials science , electrochemistry , oxide , chemical engineering , cathode , scanning electron microscope , nanotechnology , titanium dioxide , electrocatalyst , inorganic chemistry , chemistry , electrode , composite material , engineering , metallurgy
The oxygen reduction reaction (ORR) is one of the key fundamental reactions that occur at electrocatalytic cathode surfaces for fuel cell applications. Herein, we report the development of a series of nanocomposites of reduced graphene oxide (rGO) and PtRu nanoparticles with different atomic ratios of Pt/Ru deposited on titanium dioxide nanotubes (TiO 2 NTs) (termed as TiO 2 NT/rGO–PtRu) for the ORR. The TiO 2 NT/rGO–PtRu nanocomposites were prepared by using a facile one‐step electrochemical deposition, and characterized through field‐emission scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. Our experimental results have shown that the synthesized TiO 2 NT/rGO–PtRu nanocomposite with a Pt/Ru ratio of 64:36 exhibits the highest electrocatalytic activity toward the ORR with an onset potential of 0.58 V (vs. RHE) and a high stability, which is promising for environmental and green energy applications.
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