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    Modification of Layered Graphitic Carbon Nitride by Nitrogen Plasma for Improved Electrocatalytic Hydrogen Evolution

    Year: 2019

    Journal: Nanomaterials, Volume 9, APR

    Authors: Gao, Ming; Liu, Danni; Yang, Huanhuan; Huang, Hao; Luo, Qian; Huang, Yifan; Yu, Xue-Feng; Chu, Paul K.

    Organizations: Special Project for Promoting Economic Development in Guangdong Province [GDME-2018D004]; Shenzhen Science and Technology Innovation Committee [JCYJ20170143165807008]; Shenzhen Peacock Program [KQTD2016030111500545]; Leading Talents of Guangdong Province Program [00201520]; Hong Kong Research Grants Council (RGC) General Research Funds (GRF)Hong Kong Research Grants Council [CityU 11205617]; City University of Hong Kong Strategic Research Grant (SRG)City University of Hong Kong [7005105]

    Keywords: layered graphitic carbon nitride; plasma treatment; electrocatalytic performance; hydrogen evolution reaction

    As a layered nano-sheet material, layered graphitic carbon nitride (g-C3N4) has attracted attention in multifunctional photocatalytic applications. However, g-C3N4 is electrochemically inert consequently hampering electrochemical applications. In this work, low-temperature nitrogen plasma processing was conducted to modify g-C3N4 to enhance the electrocatalytic performance in the hydrogen evolution reaction (HER). The plasma produced significant morphological and chemical changes on the surface of g-C3N4 via active species, and nitrogen atoms were incorporated into the surface while the bulk properties did not change. The modification improved the surface hydrophilicity and electrocatalytic HER activity, as well as excellent stability in HER after 2000 cycles. Our results revealed that plasma treatment was a promising technique to improve the HER of carbon-based layered nano-sheet materials.
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