Promoted interfacial charge transfer by coral-like nickel diselenide for enhanced photocatalytic hydrogen evolution over carbon nitride nanosheet. (8th January 2022)

• Record Type: Journal Article
• Authors: Zhang, Xue; Xi, Chuanjun; Yue, Yuanhang; Deng, Puhui; Zhang, Linping; Hou, Yu
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 3(2022)
• Page Start: 1624
• Page End: 1632
• Publication Date: 2022-01-08
• Subjects: Photocatalyst -- Nickel selenide -- Graphite carbon nitride -- Hydrogen evolution -- Cocatalyst; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.10.225
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Seeking an efficient and non-precious co-catalyst for g-C3 N4 (CN) remains a great demanding to achieve high photocatalytic hydrogen generation performance. Herein, a composite photocatalyst with high efficiency was prepared by modifying CN with coral-like NiSe2 . The optimal hydrogen evolution rate of 643.16 μmol g −1 h −1 is from NiSe2 /CN-5 under visible light. Superior light absorption and interfacial charge transfer properties including suppressed photogenerated carrier recombination and efficient separation of photogenerated electron-hole pairs have been observed, which account for the enhanced photocatalytic performance of CN. Graphical abstract: The NiSe2 -modified g-C3 N4 composite photocatalyst, NiSe2 /CN-5, with superior hydrogen production performance was successfully prepared. The accelerated electron transfer rate and suppressed recombination of photogenerated electron-hole pairs account for the enhanced photocatalytic activity. Image 1 Highlights: NiSe2 was fabricated on the surface of g-C3 N4 nanosheet successfully. Photocatalytic HER performance of g-C3 N4 was enhanced with NiSe2 as co-catalyst. NiSe2 /g-C3 N4 improves the light utilization and accelerates electron transfer. NiSe2 /g-C3 N4 facilitates the separation of photogenerated electron-hole pairs.