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Research Papers

Electrocatalytic Reduction of Oxygen on Ni/Graphite Nanoparticles

[+] Author and Article Information
M. A. Ibrahim

Department of Chemistry, Faculty of Science,  University of Tabuk, Tabuk, Saudi Arabia; Department of Chemistry, Faculty of Education in El-Arish, North Sinai, Egyptscience1712@gmail.com

Falleh Al-Solamy

Department of Mathematics, Faculty of Science,  University of Tabuk, Tabuk, Saudi Arabiafalleh@gmail.com

Omar Al-Hartomy

Department of Physics, Faculty of Science,  University of Tabuk, Tabuk, Saudi Arabiaoalhartomy@yahoo.com

A. A. Al-Ghamdi

Department of Physics, Faculty of Science,  King Abdulaziz University, Jeddah, P.O. 80203, Jeddah 21569, Saudi Arabiaaghamdi90@yahoo.com

Farid El-Tantawy

Department of Physics, Faculty of Science,  Suez Canal University, Ismailia, Egypteltantawyfarid@yahoo.com

J. Fuel Cell Sci. Technol 9(4), 041003 (Jun 14, 2012) (4 pages) doi:10.1115/1.4006795 History: Received February 16, 2011; Revised April 01, 2012; Published June 14, 2012; Online June 14, 2012

Ni/Graphite nanocomposite with various compositions were synthesized by a chemical and physical method. These nanocomposites exhibit a 40–60 fold enhancement in O2 reduction activity as compared to the commercial Ni catalyst.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

SEM images of: (a), (b), foliated graphite sheets prepared upon 24 h ultrasonic irradiation with different magnification, (c) SEM image of GN20 sample; and (d) EDX pattern recorded for GN nanoparticles

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Figure 2

Cyclic voltammograms of Ni80G20 and Ni supported on GC electrodes obtained in 0.1 M HClO4 . Scan rate 50 m V s−1 .

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Figure 3

Comparison of specific activity of ORR

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Figure 4

Comparison of mass activity of ORR

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Figure 5

Polarization curves obtained in O2 -saturated 0.1 M HClO4 at room temperature. Scan rate: 25 mV s−1 . Electrode rotation rate: 900 rpm. The arrow indicates the potential scan direction.

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