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Issue 15, 2018
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Nanoscale mapping of catalytic hotspots on Fe, N-modified HOPG by scanning electrochemical microscopy-atomic force microscopy

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Abstract

The scanning electrochemical microscopy-atomic force microscopy (SECM-AFM) technique is used to map catalytic currents post Fe and N surface modification of graphitic carbon with an ultra-high resolution of 50 nm. The oxidation current of the partial reduction product, hydrogen peroxide, was also mapped in the same location in the graphitic carbon. The current mapping and ex situ spectroscopic evidence revealed that Fe-coordinated nitrogen sites formed both in the edge and basal planes of highly ordered pyrolytic graphite (HOPG) constitute the primary oxygen reduction catalytic sites in acid solutions of this important yet insufficiently understood class of catalysts.

Graphical abstract: Nanoscale mapping of catalytic hotspots on Fe, N-modified HOPG by scanning electrochemical microscopy-atomic force microscopy

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Publication details

The article was received on 30 Jan 2018, accepted on 06 Mar 2018 and first published on 07 Mar 2018


Article type: Paper
DOI: 10.1039/C8NR00849C
Citation: Nanoscale, 2018,10, 6962-6970
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    Nanoscale mapping of catalytic hotspots on Fe, N-modified HOPG by scanning electrochemical microscopy-atomic force microscopy

    S. Kolagatla, P. Subramanian and A. Schechter, Nanoscale, 2018, 10, 6962
    DOI: 10.1039/C8NR00849C

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