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Pt-Co deposited on polyaniline-modified carbon for the electro- reduction of oxygen: The interaction between Pt-Co nanoparticle and polyaniline

Abstract

Polyaniline-modified carbon black supported platinum-cobalt alloy nanoparticles (Pt-Co/C-PANI) catalysts were prepared via a microwave-assisted polyol method and subsequently high temperature annealing. X-ray diffraction (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA), and derivative thermogravimetric (DTG) were used to characterize the structure of catalysts. We find the electron delocalization between the metal d orbitals and PANI is beneficial to improving the ORR performance and the PANI on carbon can prevent the aggregation of Pt-Co nanoparticles during the high temperature treatments. Electrochemical evaluations reveal the obtained Pt-Co/C-PANI catalysts annealed at 500℃ show the highest mass activity of 1.33 A/mgPt and specific activity of 1.29 mA/cm2, 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℃ and the metal-nitrogen (M-N) bonds are formed in Pt-Co/C-PANI-500℃, which are attributed to the impressive ORR activity enhancement in Pt-Co/C-PANI-500℃.

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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, Accepted Manuscript
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    Pt-Co deposited on polyaniline-modified carbon for the electro- reduction of oxygen: The interaction between Pt-Co nanoparticle and polyaniline

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

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