Volume 21, Issue 24 2412234
Research Article

d-Orbital Single Electron Filling O─O π* Bonds on WO3S1 Sites for Highly Selective Generation of Hydroxyl Radicals

Hui Li

Hui Li

School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China

Search for more papers by this author
Tianhao Li

Tianhao Li

School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China

Search for more papers by this author
Ran Zhao

Ran Zhao

School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China

Search for more papers by this author
Hexiang Zhao

Hexiang Zhao

School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China

Search for more papers by this author
Haodong Ji

Haodong Ji

Eco-environment and Resource Efficiency Research Laboratory, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055 P. R. China

Search for more papers by this author
Fangyuan Chen

Corresponding Author

Fangyuan Chen

School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
Zhurui Shen

Corresponding Author

Zhurui Shen

School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
Sihui Zhan

Corresponding Author

Sihui Zhan

College of Environmental Science and Engineering, Tianjin University, Tianjin, 300350 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
First published: 24 April 2025

Abstract

Hydroxyl radical (•OH) stemming from dissolved oxygen (O2) via photocatalysis is very attractive, but its poor selectivity and generation efficiency greatly limit its application. Herein, a kind of tungsten single site co-coordinated with O and S atoms (WO3S1) is established on ZnIn2S4 (W-ZIS). The strong interactions in WO3S1 shift the d-band center toward the Fermi level, enhancing the adsorption of O2. These interactions improve the accumulation of photo-generated electrons on WO3S1, facilitating the dissociation of O─O bonds in crucial intermediates and promoting the selective conversion from O2 into •OH. This brings a state-of-the-art selectivity (40.2%) and generation efficiency (1668.90 mmol. g−1. L−1. h−1) of •OH production. Experimental results and theoretical simulations have elucidated that O2 can be reduced by d-orbitals single electron (, _, _, _, _, _) of WO3S1 transfer to 2p-orbital O─O pi anti-bonding (π*: px and py), initially activating O2. Additionally, WO3S1 sites facilitate the cleavage of H2O, optimizing proton adsorption through W─O orbital coupling in WO3S1 and promoting the transformation of oxygen-containing intermediates. More importantly, d-orbitals single electron can fill O─O π* bond in •OOH intermediate, weakening the covalency of the O─O bond, mitigating the formation of H2O2 and shortening the pathway for •OH generation.).

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.