Photoinduced semiconductor-metal transition in ultrathin troilite FeS nanosheets to trigger efficient hydrogen evolution

Gang Zhou, Yun Shan, Longlu Wang, Youyou Hu, Junhong Guo, Fangren Hu, Jiancang Shen, Yu Gu, Jingteng Cui, Lizhe Liu () and Xinglong Wu ()
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Gang Zhou: Nanjing University
Yun Shan: Nanjing University
Longlu Wang: Hunan University
Youyou Hu: Jiangsu University of Science and Technology
Junhong Guo: Nanjing University of Posts and Telecommunications
Fangren Hu: Nanjing University of Posts and Telecommunications
Jiancang Shen: Nanjing University
Yu Gu: Nanjing University
Jingteng Cui: Nanjing Xiaozhuang University
Lizhe Liu: Nanjing University
Xinglong Wu: Nanjing University

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract The exploitation of the stable and earth-abundant electrocatalyst with high catalytic activity remains a significant challenge for hydrogen evolution reaction. Being different from complex nanostructuring, this work focuses on a simple and feasible way to improve hydrogen evolution reaction performance via manipulation of intrinsic physical properties of the material. Herein, we present an interesting semiconductor-metal transition in ultrathin troilite FeS nanosheets triggered by near infrared radiation at near room temperature for the first time. The photogenerated metal-phase FeS nanosheets demonstrate intrinsically high catalytic activity and fast carrier transfer for hydrogen evolution reaction, leading to an overpotential of 142 mV at 10 mA cm−2 and a lower Tafel slope of 36.9 mV per decade. Our findings provide new inspirations for the steering of electron transfer and designing new-type catalysts.

Date: 2019
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DOI: 10.1038/s41467-019-08358-z

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