AuPd bimetallic nanoparticles decorated Cd0.5Zn0.5S photocatalysts with enhanced visible-light photocatalytic H2 production activity. (7th September 2016)

• Record Type: Journal Article
• Authors: Wu, Linen; Gong, Jie; Ge, Lei; Han, Changcun; Fang, Siman; Xin, Yongji; Li, Yujing; Lu, Yan
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 33(2016)
• Page Start: 14704
• Page End: 14712
• Publication Date: 2016-09-07
• Subjects: Cd0.5Zn0.5S -- Photocatalyst -- AuPd bimetallic alloy -- Water splitting -- Visible light; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.04.157
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this study, novel AuPd bimetallic co-catalyst decorated Cd0.5 Zn0.5 S photocatalyst was successfully synthesized via an in-situ chemical deposition method. The physical as well as the photophysical properties of the as-obtained AuPd/Cd0.5 Zn0.5 S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV–vis diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPV). The AuPd bimetallic co-catalysts showed dramatic photo-generated charge separation efficiency in Cd0.5 Zn0.5 S sample, and thus significantly enhance the H2 production activity under visible light irradiation. The AuPd/Cd0.5 Zn0.5 S sample with 0.5 wt% content had the highest catalytic activity, and the corresponding H2 evolution rate is 3.65 mmol g −1 h −1, which was about 12 times as that of pure Cd0.5 Zn0.5 S sample under visible light irradiation. The photocatalytic activity of the photocatalyst was stable even after 9 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of AuPd NPs was systematically investigated, which can provide a novel concept for the synthesis of other desirable photocatalytic materials. Graphical abstract: Highlights: AuPd/Cd0.5 Zn0.5 S photocatalysts were synthesized via a facile method. The AuPd/Cd0.5 Zn0.5 S shows significantly enhanced H2 evolution activity. The intimate interfaces promote the charge transfer and separation. The mechanism was proposed and confirmed by SPV result.