Fast in-situ photodeposition of Ag and Cu nanoparticles onto AgTaO3 perovskite for an enhanced photocatalytic hydrogen generation. (20th March 2020)

• Record Type: Journal Article
• Authors: Carrasco-Jaim, Omar A.; Huerta-Flores, Ali M.; Torres-Martínez, Leticia M.; Moctezuma, Edgar
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 16(2020)
• Page Start: 9744
• Page End: 9757
• Publication Date: 2020-03-20
• Subjects: AgTaO3 perovskite -- Photocatalytic hydrogen production -- In-situ photoreduction -- Noble metal nanoparticles; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.01.242
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The M (M = Ag, Cu) nanoparticles were deposited by a fast in-situ photoreduction method onto the AgTaO3 photocatalyst surface using 1, 2, and 5 wt % ratios, in order to investigate their photocatalytic properties for hydrogen production. The obtained results indicated a nanoparticles growth <20 nm in diameter during 10 min of photoreduction process for both nanoparticles. The M (M = Ag, Cu) NPs/AgTaO3 exhibited superior photocatalytic activity than bare AgTaO3, with an efficiency increment of around 11 and 30 times at 2 wt % ratio of Ag and Cu nanoparticles, respectively. The excellent photocatalytic activity could be related to the surface plasmon resonance effect of nanoparticles, preventing the electron-hole recombination. Additionally, the optical and photoelectrochemical characterization revealed the presence and the effect of oxidized species of the nanoparticles, with a direct impact on the transport of photogenerated charge carriers for the improvement of the photocatalytic activity. Graphical abstract: Image 1 Highlights: A fast in-situ photodeposition of Ag and Cu nanoparticles onto AgTaO3 was performed. The nanoparticles at 2 wt% proportion showed the highest photocatalytic activity. The Cu nanoparticles exhibited 2.5 times superior activity than Ag nanoparticles. The oxidizing species of nanoparticles influence the charge transport mechanism.