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Issue 23, 2018

The synergetic effect of h-BN shells and subsurface B in CoBx@h-BN nanocatalysts for enhanced oxygen evolution reactions

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Abstract

Boron-containing cobalt (Co–B) nanoparticles (NPs) synthesized by the borohydride reduction process were subjected to ammonization. Part of B species segregate onto particle surfaces to form ultrathin h-BN shells which stabilize highly dispersed Co NPs under harsh conditions and the remaining B atoms interact strongly with Co atoms inside the NPs. The formed CoBx@h-BN core–shell nanocatalysts exhibit an overpotential of 290 mV at a current density of 10 mA cm−2 making them among the most active catalysts for the oxygen evolution reaction (OER) and they present 150 h OER stability. The improved OER performance has been attributed to the synergetic role of the confinement effect of h-BN shells and activation effect of subsurface B atoms. This work suggests a simple synthetic route to prepare highly active and stable metal nanocatalysts without using any surfactants and supports.

Graphical abstract: The synergetic effect of h-BN shells and subsurface B in CoBx@h-BN nanocatalysts for enhanced oxygen evolution reactions

Supplementary files

Article information


Submitted
12 Mar 2018
Accepted
08 May 2018
First published
10 May 2018

J. Mater. Chem. A, 2018,6, 10644-10648
Article type
Communication

The synergetic effect of h-BN shells and subsurface B in CoBx@h-BN nanocatalysts for enhanced oxygen evolution reactions

S. Chen, Y. Li, Z. Zhang, Q. Fu and X. Bao, J. Mater. Chem. A, 2018, 6, 10644 DOI: 10.1039/C8TA02312C

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