Half-metallic carbon nitride nanosheets with micro grid mode resonance structure for efficient photocatalytic hydrogen evolution

Gang Zhou, Yun Shan, Youyou Hu, Xiaoyong Xu, Liyuan Long, Jinlei Zhang, Jun Dai, Junhong Guo, Jiancang Shen, Shuang Li, Lizhe Liu () and Xinglong Wu ()
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Gang Zhou: Nanjing University
Yun Shan: Nanjing University
Youyou Hu: Jiangsu University of Science and Technology
Xiaoyong Xu: Yangzhou University
Liyuan Long: Nanjing University
Jinlei Zhang: Nanjing University
Jun Dai: Jiangsu University of Science and Technology
Junhong Guo: Nanjing University of Posts and Telecommunications
Jiancang Shen: Nanjing University
Shuang Li: Nanjing Xiaozhuang University
Lizhe Liu: Nanjing University
Xinglong Wu: Nanjing University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Photocatalytic hydrogen evolution from water has triggered an intensive search for metal-free semiconducting photocatalysts. However, traditional semiconducting materials suffer from limited hydrogen evolution efficiency owing to low intrinsic electron transfer, rapid recombination of photogenerated carriers, and lack of artificial microstructure. Herein, we report a metal-free half-metallic carbon nitride for highly efficient photocatalytic hydrogen evolution. The introduced half-metallic features not only effectively facilitate carrier transfer but also provide more active sites for hydrogen evolution reaction. The nanosheets incorporated into a micro grid mode resonance structure via in situ pyrolysis of ionic liquid, which show further enhanced photoelectronic coupling and entire solar energy exploitation, boosts the hydrogen evolution rate reach up to 1009 μmol g−1 h−1. Our findings propose a strategy for micro-structural regulations of half-metallic carbon nitride material, and meanwhile the fundamentals provide inspirations for the steering of electron transfer and solar energy absorption in electrocatalysis, photoelectrocatalysis, and photovoltaic cells.

Date: 2018
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DOI: 10.1038/s41467-018-05590-x

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