Abstract

Understanding the sensing mechanism of metal oxide semiconductors is imperative to the development of high-performance sensors. The traditional sensing mechanism only recognizes the effect of surface chemisorbed oxygen from the air but ignores surface lattice oxygen. Herein, using in-situ characterizations, we provide direct experimental evidence that the surface chemisorbed oxygen participated in the sensing process can come from lattice oxygen of the oxides. Further density functional theory (DFT) calculations prove that the p-band center of O serves as a state of art for regulating the participation of lattice oxygen in gas-sensing reactions. Based on our experimental data and theoretical calculations, we discuss mechanisms that are fundamentally different from the conventional mechanism and show that the easily participation of lattice oxygen is helpful for the high response value of the materials.

Understanding the sensing mechanism of metal oxide semiconductors is imperative for developing high-performance sensors. Here, the participation of lattice oxygen, caused by additional Ge, boosts the hydrogen sensing ability of SnO2.

Details

Title
Essential role of lattice oxygen in hydrogen sensing reaction
Author
Li, Jiayu 1 ; Si, Wenzhe 2 ; Shi, Lei 1 ; Gao, Ruiqin 3   VIAFID ORCID Logo  ; Li, Qiuju 4   VIAFID ORCID Logo  ; An, Wei 1 ; Zhao, Zicheng 1 ; Zhang, Lu 1 ; Bai, Ni 5 ; Zou, Xiaoxin 1 ; Li, Guo-Dong 1   VIAFID ORCID Logo 

1  Jilin University, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Changchun, P. R. China (GRID:grid.64924.3d) (ISNI:0000 0004 1760 5735) 
2  Tsinghua University, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing, P. R. China (GRID:grid.12527.33) (ISNI:0000 0001 0662 3178) 
3  NingboTech University, School of Biological and Chemical Engineering, Ningbo, P. R. China (GRID:grid.513221.6) 
4  Third Military Medical University (Army Medical University), Department of Chemistry, College of Basic Medicine, Chongqing, P. R. China (GRID:grid.410570.7) (ISNI:0000 0004 1760 6682) 
5  Jiangsu University of Science and Technology, School of Metallurgy Engineering, Zhangjiagang, P. R. China (GRID:grid.510447.3) (ISNI:0000 0000 9970 6820) 
Pages
2998
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-024-47078-x
ProQuest document ID
3034564542
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.