Well-defined FeP/CdS heterostructure construction with the assistance of amine for the efficient H2 evolution under visible light irradiation. (13th November 2020)

• Record Type: Journal Article
• Authors: Dou, Ming-Yu; Han, Shu-Rui; Du, Xin-Xin; Pang, Dong-Hui; Li, Lei-Lei
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 56(2020)
• Page Start: 32039
• Page End: 32049
• Publication Date: 2020-11-13
• Subjects: Water splitting -- Photocatalysis -- Iron phosphide -- Hydrogen generation -- Well-defined heterostructures; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.08.252
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The photocatalyst is a crucial factor in determining solar-to-H2 efficiency for solar-driven water splitting. Here, the FeP/CdS well-defined heterostructure was elaborately designed and successfully constructed in-situ to achieve efficient water splitting by using a simple and green solvothermal approach. In the synthetic process, the ethylenediamine plays an important role in the construction of intimate contact interface between FeP and CdS. This good quality FeP/CdS heterostructure can efficiently promote charge separation and transportation, and therefore the charge recombination of CdS was significantly suppressed. As a result, the as-synthesized FeP/CdS heterostructure showed excellent photocatalytic performance under visible-light irradiation with an optimal hydrogen evolution rate of 37.92 mmol g −1 h −1 and an apparent quantum yield of 31.50% at 420 nm far exceeding that of pristine CdS by more than 122 folds. This rate, to the best of our knowledge, outperforms other similar catalytic systems. Graphical abstract: Image 1 Highlights: Well-defined FeP/CdS heterostructure was fabricated with the assistance of amine. Construction and catalytic mechanism of FeP/CdS was detailedly studied. Intimate contact interface contributes to its good performance.