Publication result detail

Next-generation photocatalytic system: Ga2O3-modified Ga Nanoislands on graphene for H2 production

BARTOŠÍK, M.; MACH, J., EDELMANNOVÁ M. F., KOČÍ, K.

Original Title

Next-generation photocatalytic system: Ga2O3-modified Ga Nanoislands on graphene for H2 production

English Title

Next-generation photocatalytic system: Ga2O3-modified Ga Nanoislands on graphene for H2 production

Type

WoS Article

Original Abstract

Study investigates Ga2O3/Ga on Graphene/SiO2/Si, prepared via temperature-controlled growth of Ga, for photocatalytic hydrogen generation, marking the first exploration of this system for such purpose. Thin surface ultra-wide band gap Ga2O3 layer effectively photoemits electron-hole pairs under UVC and the metallic Ga cores enhance electric field separating charge carriers by formation of localized surface plasmon (LSP) resonances. These effects increase hydrogen yields. Computational analysis of LSP-induced electric field enhancement quantitatively supports proposed fundamental mechanism underlying sample's photoactivity. The most active photocatalyst (Ga-M) with medium-size Ga particles (radius 14 nm) exhibited ten thousand times higher activity per gram than commercial TiO2.

English abstract

Study investigates Ga2O3/Ga on Graphene/SiO2/Si, prepared via temperature-controlled growth of Ga, for photocatalytic hydrogen generation, marking the first exploration of this system for such purpose. Thin surface ultra-wide band gap Ga2O3 layer effectively photoemits electron-hole pairs under UVC and the metallic Ga cores enhance electric field separating charge carriers by formation of localized surface plasmon (LSP) resonances. These effects increase hydrogen yields. Computational analysis of LSP-induced electric field enhancement quantitatively supports proposed fundamental mechanism underlying sample's photoactivity. The most active photocatalyst (Ga-M) with medium-size Ga particles (radius 14 nm) exhibited ten thousand times higher activity per gram than commercial TiO2.

Keywords

Photocatalysis; Hydrogen generation; Ga material; Water splitting

Key words in English

Photocatalysis; Hydrogen generation; Ga material; Water splitting

Authors

BARTOŠÍK, M.; MACH, J., EDELMANNOVÁ M. F., KOČÍ, K.

RIV year

2025

Released

24.05.2024

Publisher

Elsevier

Location

AMSTERDAM

ISBN

2950-6492

Volume

191

Number

June

Pages from

1

Pages to

8

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S2950648424000300

Full text in the Digital Library

http://hdl.handle.net/11012/252554

BibTex

@article{BUT197232,
  author="Miroslav {Bartošík} and Miroslava Filip {Edelmannová} and Jindřich {Mach} and Kamila {Kočí}",
  title="Next-generation photocatalytic system: Ga2O3-modified Ga Nanoislands on graphene for H2 production",
  year="2024",
  volume="191",
  number="June",
  pages="1--8",
  doi="10.1016/j.apcato.2024.206944",
  url="https://www.sciencedirect.com/science/article/pii/S2950648424000300"
}

Documents

1-s2.0-S2950648424000300-main