Effects of Surface Terminations of 2D Bi2WO6 on Photocatalytic Hydrogen Evolution from Water Splitting

被引：98

作者：

Wu, Sujuan ^{[1
,2
]}

Sun, Jianguo ^{[1
,3
]}

Li, Qi ^{[1
]}

Hood, Zachary D. ^{[4
,5
]}

Yang, Shize ^{[2
]}

Su, Tongming ^{[4
,6
]}

Peng, Rui ^{[4
]}

Wu, Zili ^{[4
]}

Sun, Weiwei ^{[4
]}

Kent, Paul R. C. ^{[4
,7
]}

Jiang, Bin ^{[1
]}

Chisholm, Matthew F. ^{[2
]}

机构：

[1] Chongqing Univ, Electron Microscopy Ctr, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37830 USA

[3] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore

[4] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[5] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[6] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

[7] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 17期

基金：

美国国家科学基金会;

关键词：

surface terminations; Bi2WO6; water splitting; two-dimensional (2D); ternary oxide; photocatalyst; EFFICIENT; H-2; TRANSITION; NANOSHEETS;

D O I：

10.1021/acsami.0c01802

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Two-dimensional (2D)-structured photocatalysts with atomically thin layers not only have the potential to enhance hydrogen generation efficiency but also allow more direct investigations of the effects of surface terminations on photocatalytic activity. Taking 2D Bi2WO6 as a model, we found that the configuration of bilayer Bi(2)O(2 )sandwiched by alternating WO4 layers enabled the thermodynamic driving potential for photocatalytic hydrogen evolution. Without Pt deposition, the H-2 generation efficiency can reach to 56.9 mu mol/g/h by 2D Bi2WO6 as compared with no activity of Bi2WO6 nanocrystals under simulated solar light. This configuration is easily functionalized by adsorption of Cl-/Br- to form Bi-Cl/Bi-Br bonds, which leads to the decrease of recombination in photogenerated charge carriers and narrower band gaps. This work highlights an effective way to design photocatalysts with efficient hydrogen evolution by tuning the surface terminations.

引用

页码：20067 / 20074

页数：8

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