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High-Index Faceted CuFeS2 Nanosheets with Enhanced Behavior for Boosting Hydrogen Evolution Reaction

Abstract

Rational design of highly active and robust catalysts based on earth-abundant elements for hydrogen evolution reaction (HER) is essential for future renewable energy application. Herein, we report the synthesis of a new class of ultrathin metallic CuFeS2 nanosheets (NSs) with abundant exposed high-index {0-24} facet. 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 is the best system among all the reported non-noble metal catalysts. The theoretical calculations reveal that the mechanistic origins for such high HER activity should be attributed to the excess S2- active sites on the exposed {0-24} 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 facet in order to increase the number of active sites for boosting the HER performance.

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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, Accepted Manuscript
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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, J. Lan, F. Cheng, Y. Li, J. Huang and P. Xi, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03182C

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