Monitoring a CuO gas sensor at work: an advanced in situ X-ray absorption spectroscopy study

Author(s)

Volanti, D. P. ^{[1, 2]} ; Felix, A. A. ^[2] ; Suman, P. H. ^[2] ; Longo, E. ^[2] ; Varela, J. A. ^[2] ; Orlandi, M. O. ^[2]

Affiliation

^[1] UNESP Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, BR-15054000 Sao Jose Do Rio Preto - Brazil

^[2] UNESP Univ Estadual Paulista, Inst Quim, Dept Fis Quim, BR-14800900 Araraquara - Brazil

• Document type: Journal article
• Source: Physical Chemistry Chemical Physics; v. 17, n. 28, p. 18761-18767, 2015.
• Web of Science Citations: 13

Abstract

X-ray absorption near edge structure (XANES) and electrical measurements were used to elucidate the local structure and electronic changes of copper(II) oxide (CuO) nanostructures under working conditions. For this purpose, a sample holder layout was developed enabling the simultaneous analysis of the spectroscopic and electrical properties of the sensor material under identical operating conditions. The influence of different carrier gases (e.g., air and N-2) on the CuO nanostructures behavior under reducing conditions (H-2 gas) was studied to analyze how a particular gas atmosphere can modify the oxidation state of the sensor material in real time. (AU)

• FAPESP's process: 13/14647-6 - Gas sensors based on p-type metal semiconductor oxides: in-situ and operando advanced studies
• Grantee: Anderson André Felix
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 11/02408-1 - Morphological control of nanostructured copper (II) oxide and zinc oxide applied in gas sensors
• Grantee: Diogo Paschoalini Volanti
• Support type: Scholarships in Brazil - Post-Doctorate