Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors

• DOI: 10.1021/acssensors.2c02739
• Publication Date: 2023-04-05T14:56:46Z
• Authors: Dominik Baier; Tatiana Priamushko; Christian Weinberger; Freddy Kleitz; Michael Tiemann
• Keywords: Physisorption; Copper oxide

The production of hydrogen and the utilization biomass for sustainable concepts energy conversion storage require gas sensors that discriminate between (H2) carbon monoxide (CO). Mesoporous copper–ceria (Cu–CeO2) materials with large specific surface areas uniform porosity are prepared by nanocasting, their textural properties characterized N2 physisorption, powder XRD, scanning electron microscopy, transmission energy-dispersive X-ray spectroscopy. oxidation states copper (Cu+, Cu2+) cerium (Ce3+, Ce4+) investigated XPS. used as resistive H2 CO. show a stronger response to CO than low cross-sensitivity humidity. Copper turns out be necessary component; copper-free ceria same method only poor sensing performance. By measuring both gases (CO H2) simultaneously, it is shown this behavior can utilized selective in presence H2.