High-index faceted CuFeS2 nanosheets with enhanced behavior for boosting hydrogen evolution reaction
High-index faceted CuFeS2 nanosheets with enhanced behavior for boosting hydrogen evolution reaction
复制标题
高折射率多面 CuFeS2 纳米片具有增强的性能，可促进析氢反应
DOI：
10.1039/c7nr03182c
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发表时间：
2017-07-14
期刊：
影响因子：
6.7
通讯作者：
Xi, Pinxian
中科院分区：
文献类型：
--
作者：
Li, Yuxuan;Wang, Yu;Xi, Pinxian
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) over bar4} facets. They serve as a robust catalyst for the HER with a lower onset potential of 28.1 mV, an over-potential 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 S(2-)active sites on the exposed {0 (2) over bar 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.
