Concepedia

Direct <i>in situ</i> spectroscopic evidence of the crucial role played by surface oxygen vacancies in the O<sub>2</sub>-sensing mechanism of SnO<sub>2</sub>

Stefan Kucharski, Pilar Ferrer, Federica Venturini, Georg Held, Alex S. Walton, Conor Byrne, James A. Covington, Sai Kiran Ayyala, Andrew M. Beale, Christopher S. Blackman

Chemical Science · 2022 · 49 citations · 30 references

DOIFull text

Open access

Concepts

Abstract

NAP-XPS characterisation of SnO 2 under operando conditions shows that resistance change, band bending and surface O-vacancy concentration are correlated with ambient O 2 concentration, challenging current preconceptions of gas sensor function.

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