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Issue 26, 2017
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High-index faceted CuFeS2 nanosheets with enhanced behavior for boosting hydrogen evolution reaction

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Abstract

A rational design of highly active and robust catalysts based on earth-abundant elements for hydrogen evolution reaction (HER) is essential for future renewable energy applications. Herein, we report the synthesis of a new class of ultrathin metallic CuFeS2 nanosheets (NSs) with abundant exposed high-index {0[2 with combining macron]4} facets. They serve as a robust catalyst for the HER with a lower onset potential of 28.1 mV, an overpotential of only 88.7 mV (at j = 10 mA cm−2) and remarkable long-term stability in 0.5 M H2SO4, which make them the best system among all the reported non-noble metal catalysts. The theoretical calculations reveal that the mechanistic origin for such a high HER activity should be attributed to the excess S2− active sites on the exposed {0[2 with combining macron]4} high-index facets of CuFeS2 NSs, which have a rather favorable Gibbs free energy for atomic hydrogen adsorption. The present work highlights the importance of designing ultrathin metallic chalcopyrite nanosheets with high-index facets in order to increase the number of active sites for boosting the HER performance.

Graphical abstract: High-index faceted CuFeS2 nanosheets with enhanced behavior for boosting hydrogen evolution reaction

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Publication details

The article was received on 05 May 2017, accepted on 04 Jun 2017 and first published on 06 Jun 2017


Article type: Paper
DOI: 10.1039/C7NR03182C
Citation: Nanoscale, 2017,9, 9230-9237
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    High-index faceted CuFeS2 nanosheets with enhanced behavior for boosting hydrogen evolution reaction

    Y. Li, Y. Wang, B. Pattengale, J. Yin, L. An, F. Cheng, Y. Li, J. Huang and P. Xi, Nanoscale, 2017, 9, 9230
    DOI: 10.1039/C7NR03182C

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