Enhanced electrochemical catalytic activity by copper oxide grown on nitrogen-doped reduced graphene oxide

Zhou, Ruifeng, Zheng, Yao, Hulicova-Jurcakova, Denisa and Qiao, Shi Zhang (2013) Enhanced electrochemical catalytic activity by copper oxide grown on nitrogen-doped reduced graphene oxide. Journal of Materials Chemistry A, 1 42: 13179-13185. doi:10.1039/c3ta13299d


Author Zhou, Ruifeng
Zheng, Yao
Hulicova-Jurcakova, Denisa
Qiao, Shi Zhang
Title Enhanced electrochemical catalytic activity by copper oxide grown on nitrogen-doped reduced graphene oxide
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7488
2050-7496
Publication date 2013-01
Sub-type Article (original research)
DOI 10.1039/c3ta13299d
Open Access Status Not Open Access
Volume 1
Issue 42
Start page 13179
End page 13185
Total pages 7
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Collection year 2014
Language eng
Abstract A copper oxide/nitrogen-doped reduced graphene oxide (CuO/N-rGO) nanocomposite is synthesized through a low-temperature aqueous process. The resultant nanocomposite is characterized by spectroscopies which show significant interaction between copper and nitrogen. Electrochemical tests show that the nanocomposite exhibits superior oxygen reduction (ORR) activity, which is significantly higher than that of both N-rGO and CuO/GO, and is close to that of commercial Pt/C. Further mechanistic study confirms that the enhancement of ORR activity is prompted by the synergistic effect of copper and nitrogen, which largely accelerates the electrochemical reduction of the peroxide reaction intermediate on N-rGO during ORR, leading to higher onset potential, larger current density and electron transfer number. Larger porosity created by CuO intercalation also helps to lift the limiting current. The CuO/N-rGO not only serves as an alternative to the expensive Pt based ORR electrocatalyst due to its low price but is also promising for other applications such as peroxide/borohydride fuel cells and H2O2 detection/elimination. The study also gives an insight into the study method and mechanism of the metal-nitrogen synergistic effect on electrochemical catalysis which may inspire development of other new cost-effective electrocatalysts.
Keyword Oxygen Reduction Reaction
Metal-Free Electrocatalysts
Density-Functional Theory
Electrolyte Fuel-Cells
Carbon Nanotubes
Manganese Oxide
Alkaline
Iron
Co3O4
Nanoparticles
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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