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

Sujuan Wu; Jianguo Sun; Qi Li; Zachary D. Hood; Shize Yang; Tongming Su; Rui Peng; Zili Wu; Weiwei Sun; Paul R.C. Kent; Bin Jiang; Matthew F. Chisholm

doi:10.1021/acsami.0c01802

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

Sujuan Wu, Jianguo Sun, Qi Li, Zachary D. Hood, Shize Yang, Tongming Su, Rui Peng, Zili Wu, Weiwei Sun, Paul R.C. Kent, Bin Jiang, Matthew F. Chisholm

Research output: Contribution to journal › Article › peer-review

98 Scopus citations

Abstract

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 Bi₂O₂ sandwiched by alternating WO₄ layers enabled the thermodynamic driving potential for photocatalytic hydrogen evolution. Without Pt deposition, the H₂ generation efficiency can reach to 56.9 μmol/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.

Original language	English
Pages (from-to)	20067-20074
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	17
DOIs	https://doi.org/10.1021/acsami.0c01802
State	Published - Apr 29 2020

Funding

This research was supported by the Chongqing Research Program of Basic Research and Frontier Technology (no. cstc2018jcyjAX0408), China Scholarship Council (no. 201606055013) and Oak Ridge National Laboratory (no. CNMS2017-303). A portion of this research was completed at the Center for Nanophase Materials Sciences, which is the Department of Energy (DOE) Office of Science. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the DOE (no. DE-AC02-05CH11231). Z.D.H. acknowledges support from the National Science Foundation Graduate Research Fellowship (no. DGE-1650044). W.S. and P.R.C.K. gratefully acknowledge support from Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center funded by the DOE Office of Science Basic Energy Sciences. S.Y. and M.F.C. gratefully acknowledge support from the U.S. DOE Office of Science, Basic Energy Sciences, Materials Science and Engineering Division.

Keywords

BiWO
Surface terminations
photocatalyst
ternary oxide
two-dimensional (2D)
water splitting

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsami.0c01802

Cite this

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title = "Effects of Surface Terminations of 2D Bi2WO6 on Photocatalytic Hydrogen Evolution from Water Splitting",

abstract = "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 Bi2O2 sandwiched by alternating WO4 layers enabled the thermodynamic driving potential for photocatalytic hydrogen evolution. Without Pt deposition, the H2 generation efficiency can reach to 56.9 μmol/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.",

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author = "Sujuan Wu and Jianguo Sun and Qi Li and Hood, {Zachary D.} and Shize Yang and Tongming Su and Rui Peng and Zili Wu and Weiwei Sun and Kent, {Paul R.C.} and Bin Jiang and Chisholm, {Matthew F.}",

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AU - Yang, Shize

AU - Su, Tongming

AU - Peng, Rui

AU - Wu, Zili

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AU - Chisholm, Matthew F.

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N2 - 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 Bi2O2 sandwiched by alternating WO4 layers enabled the thermodynamic driving potential for photocatalytic hydrogen evolution. Without Pt deposition, the H2 generation efficiency can reach to 56.9 μmol/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.

AB - 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 Bi2O2 sandwiched by alternating WO4 layers enabled the thermodynamic driving potential for photocatalytic hydrogen evolution. Without Pt deposition, the H2 generation efficiency can reach to 56.9 μmol/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.

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