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Issue 14, 2017
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Pt–Co deposited on polyaniline-modified carbon for the electro-reduction of oxygen: the interaction between Pt–Co nanoparticles and polyaniline

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Abstract

Polyaniline-modified carbon black supported platinum–cobalt alloy nanoparticle (Pt–Co/C-PANI) catalysts were prepared via a microwave-assisted polyol method and subsequent high temperature annealing. X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and derivative thermogravimetric (DTG) analysis were used to characterize the structure of the catalysts. We find that the electron delocalization between the metal d orbitals and PANI is beneficial for improving the ORR performance and the PANI on carbon can prevent the aggregation of Pt–Co nanoparticles during high temperature treatments. Electrochemical evaluations reveal that the obtained Pt–Co/C-PANI catalysts annealed at 500 °C show the highest mass activity of 1.33 A mgPt−1 and a specific activity of 1.29 mA cm−2, which are 7.8 and 5.4 times higher than those of the commercial JM Pt/C catalyst, respectively. X-ray photoelectron spectroscopy (XPS) results show that only part of PANI is decomposed at 500 °C and the metal–nitrogen (M–N) bonds are formed in Pt–Co/C-PANI-500 °C, which are attributed to the impressive ORR activity enhancement in Pt–Co/C-PANI-500 °C.

Graphical abstract: Pt–Co deposited on polyaniline-modified carbon for the electro-reduction of oxygen: the interaction between Pt–Co nanoparticles and polyaniline

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Publication details

The article was received on 12 Jan 2017, accepted on 18 May 2017 and first published on 19 May 2017


Article type: Paper
DOI: 10.1039/C7NJ00145B
Citation: New J. Chem., 2017,41, 6585-6592
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    Pt–Co deposited on polyaniline-modified carbon for the electro-reduction of oxygen: the interaction between Pt–Co nanoparticles and polyaniline

    Y. Liu, N. Chen, F. Wang, Y. Cai and H. Zhu, New J. Chem., 2017, 41, 6585
    DOI: 10.1039/C7NJ00145B

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