Modification of TiO2 Nanotubes with PtRu/Graphene Nanocomposites for Enhanced Oxygen Reduction Reaction

作者：Alammari Walaa; Govindhan Maduraiveeran; Chen Aicheng

来源：ChemElectroChem, 2015, 2(12): 2041-2047.

DOI：10.1002/celc.201500295

• fuel cells
• graphene
• oxygen reduction reaction
• PtRu nanoparticles
• TiO2 nanotubes

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 (TiO2NTs) (termed as TiO2NT/rGO-PtRu) for the ORR. The TiO2NT/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 TiO2NT/rGO-PtRu nanocomposite with a Pt/Ru ratio of 64:36 exhibits the highest electrocatalytic activity toward the ORR with an onset potential of 0.58V (vs. RHE) and a high stability, which is promising for environmental and green energy applications.

• 出版日期2015-12