TiO2: Si nanotube/1T-MoSe2 nanosheet hybrids with highly efficient hydrogen evolution catalytic activity

H-Y He; Z He; Q Shen

doi:10.1016/j.jcis.2018.03.068

TiO₂: Si nanotube/1T-MoSe₂ nanosheet hybrids with highly efficient hydrogen evolution catalytic activity

J Colloid Interface Sci. 2018 Jul 15:522:136-143. doi: 10.1016/j.jcis.2018.03.068. Epub 2018 Mar 22.

Authors

H-Y He¹, Z He², Q Shen²

Affiliations

¹ College of Material Science and Engineering, Shaanxi University of Science and Technology, 710021, China. Electronic address: hehy@sust.edu.cn.
² College of Material Science and Engineering, Shaanxi University of Science and Technology, 710021, China.

PMID: 29587195
DOI: 10.1016/j.jcis.2018.03.068

Abstract

Transition metal dichalcogenides exhibit an excellent catalytic activity for hydrogen evolution reaction and continue to attract many studies. Some heterojunctions are also used to enhance the catalytic activity. In this work, the TiO₂ nanotubes/MoSe₂ and Si-doped TiO₂ NTs/MoSe₂ hybrids were synthesized. The MoSe₂ in the hybrids exhibited nanosheet morphology and metallic (1T) structure with high conductivity and catalytic activity for hydrogen evolution reaction. Moreover, MoSe₂ decoration provided high light absorbance for the hybrids and highly efficient interface-induced effect at the heterojunction. Furthermore, the Si-doping increased specific surface area and hydrophilicity. Thus, the Si-doped TiO₂ NTs/MoSe₂ hybrids showed remarkably greater photocatalytic and electrocatalytic activities than the nanotubes.

Keywords: 1T-MoSe(2); Catalytic activities; Heterojunction; Hydrogen evolution; Interface effect; Nanosheets.