Low-Dimensional Hyperthin FeS2 Nanostructures for Efficient and Stable Hydrogen Evolution Electrocatalysis
Low-Dimensional Hyperthin FeS2 Nanostructures for Efficient and Stable Hydrogen Evolution Electrocatalysis
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DOI：
10.1021/acscatal.5b01637
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发表时间：
2015-11-01
期刊：
影响因子：
12.9
通讯作者：
Leonard, Kevin C.
中科院分区：
文献类型：
--
作者：
Jasion, Daniel;Barforoush, Joseph M.;Leonard, Kevin C.
我们报道了一种可扩展的、溶液处理的方法来合成低维超薄FeS2纳米结构，并证明了二维FeS2圆盘纳米结构是一种高效、稳定的析氢电催化剂。通过改变前驱体溶液中Fe:S的比例，我们能够优先合成一维线状或二维圆盘状纳米结构。二维FeS2圆盘结构对析氢反应具有最高的电催化活性，与中性pH条件下的铂相媲美。扫描电化学显微镜证实了FeS2纳米结构的产氢能力，二维圆盘状纳米结构的产氢时间超过125 h。
We report a scalable, solution-processing method for synthesizing low-dimensional hyperthin FeS2 nanostructures, and we show that 2D FeS2 disc nanostructures are an efficient and stable hydrogen evolution electrocatalyst. By changing the Fe:S ratio in the precursor solution, we were able to preferentially synthesize either 1D wire or 2D disc nanostructures. The 2D FeS2 disc structure has the highest electrocatalytic activity for the hydrogen evolution reaction, comparable to platinum in neutral pH conditions. The ability of the FeS2 nanostructures to generate hydrogen was confirmed by scanning electrochemical microscopy, and the 2D disc nanostructures were able to generate hydrogen for over 125 h.