%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