%0 Journal Article
%A Ouyang, Shuxin
%A Tong, Hua
%A Umezawa, Naoto
%A Cao, Junyu
%A Li, Peng
%A Bi, Yingpu
%A Zhang, Yuanjian
%A Ye, Jinhua
%D 2012
%T Surface-Alkalinization-Induced
Enhancement of Photocatalytic
H2 Evolution over SrTiO3-Based Photocatalysts
%U https://acs.figshare.com/articles/journal_contribution/Surface_Alkalinization_Induced_Enhancement_of_Photocatalytic_H_sub_2_sub_Evolution_over_SrTiO_sub_3_sub_Based_Photocatalysts/2555344
%R 10.1021/ja210610h.s001
%2 https://ndownloader.figshare.com/files/4198405
%K solution environment
%K CH 3OH
%K SrTiO 3 photocatalyst
%K H 2 evolution
%K surface property
%K H 2O reduction
%K incident wavelength
%K Photocatalytic H 2 Evolution
%K semiconductor photocatalyst
%K Surface alkalinization
%K surface energy band
%K photocatalytic performance
%K quantum efficiency
%K 5 M NaOH
%K photocatalytic efficiency
%X A strategy of reaction-environment modulation was employed
to change
the surface property of a semiconductor photocatalyst to enhance its
photocatalytic performance. Surface alkalinization induced by a high
alkalinity of the solution environment significantly shifted the surface
energy band of a SrTiO3 photocatalyst to a more negative
level, supplying a strong potential for H2O reduction and
consequently promoting the photocatalytic efficiency of H2 evolution. This mechanism is also applicable for visible-light-sensitive
La,Cr-codoped SrTiO3 photocatalyst, which hence, could
achieve a high apparent quantum efficiency of 25.6% for H2 evolution in CH3OH aqueous solution containing 5 M NaOH
at an incident wavelength of 425 ± 12 nm.
%I ACS Publications