Tunable Photocatalytic HER Activity of Single-Layered
TiO<sub>2</sub> Nanosheets with Transition-Metal Doping and Biaxial
Strain
Jian Yuan
Chao Wang
Yanyu Liu
Ping Wu
Wei Zhou
10.1021/acs.jpcc.8b09848.s001
https://acs.figshare.com/articles/journal_contribution/Tunable_Photocatalytic_HER_Activity_of_Single-Layered_TiO_sub_2_sub_Nanosheets_with_Transition-Metal_Doping_and_Biaxial_Strain/7539767
The
hydrogen evolution reaction (HER) and electronic properties
of single-layered TiO<sub>2</sub> nanosheets effectively modulated
by transition-metal doping and biaxial strain were investigated in
this work. Surprisingly, the hydrogen adsorption free energy of Cr-doped
LNS-TiO<sub>2</sub> nanosheets was reduced to almost 0 eV, which is
comparable to the well-known highly efficient catalyst of Pt metal.
The tunable hydrogen adsorption ability was correlated with the O-2p<sub><i>z</i></sub> band center level. Moreover, by upshifting
the p<sub><i>z</i></sub> band center level, both the tensile
and compressive strains could decrease the hydrogen adsorption free
energy of V-doped LNS-TiO<sub>2</sub> nanosheets, even close to 0
eV with 7% tensile strain. These insights open a new avenue into realizing
high HER activity in oxide nanosheets.
2018-12-20 00:00:00
strain
single-layered TiO 2 nanosheets
Tunable Photocatalytic HER Activity
Single-Layered TiO 2 Nanosheets
tunable hydrogen adsorption ability
V-doped LNS-TiO 2 nanosheets
hydrogen evolution reaction
Cr-doped LNS-TiO 2 nanosheets
p z band center level
0 eV
hydrogen adsorption
O -2p z band center level