Electrocatalysts based on platinized titanium dioxide doped with ruthenium for hydrogen and carbon monoxide potentiometric sensors
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| 1. | Title | Title of document | Electrocatalysts based on platinized titanium dioxide doped with ruthenium for hydrogen and carbon monoxide potentiometric sensors |
| 2. | Creator | Author's name, affiliation, country | A. A. Belmesov; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences; Russian Federation |
| 2. | Creator | Author's name, affiliation, country | L. V. Shmygleva; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences; Russian Federation |
| 2. | Creator | Author's name, affiliation, country | N. V. Romanova; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences; Russian Federation |
| 2. | Creator | Author's name, affiliation, country | M. Z. Galin; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences; Russian Federation |
| 2. | Creator | Author's name, affiliation, country | A. V. Levchenko; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences; Russian Federation |
| 3. | Subject | Discipline(s) | |
| 3. | Subject | Keyword(s) | potentiometric gas sensors; hydrogen sensors; CO sensors; platinized titanium oxide; electrocatalysts; oxide carriers |
| 4. | Description | Abstract | In this work, electrocatalysts based on platinized TiO2(Ru) oxides with different ruthenium contents were studied for usage as a working electrode for solid-state potentiometric sensors for H2 and CO. Increasing the ruthenium content does not affect the particle size of platinum, but reduces its content in the metallic state. The work presents data from X-ray phase and X-ray fluorescence analyzes and scanning electron microscopy. The resulting electrocatalysts were studied as working electrode materials in hydrogen and carbon monoxide sensors with concentrations in the air flow from 1 to 50 000 ppm. The characteristics of the sensors are affected by the composition of the oxide carrier and its structure. For practical usage, the electrocatalysts with a rutile structure are recommended; the ruthenium content is determined by the analyzed range of CO concentrations. |
| 5. | Publisher | Organizing agency, location | The Russian Academy of Sciences |
| 6. | Contributor | Sponsor(s) |
Ministry of Science and Higher Education of the Russian Federation (075-03-2022-064/2) Ministry of Science and Higher Education of the Russian Federation (075-03-2019-588) |
| 7. | Date | (DD-MM-YYYY) | 15.09.2024 |
| 8. | Type | Status & genre | Peer-reviewed Article |
| 8. | Type | Type | Research Article |
| 9. | Format | File format | |
| 10. | Identifier | Uniform Resource Identifier | https://journals.eco-vector.com/0424-8570/article/view/684856 |
| 10. | Identifier | Digital Object Identifier (DOI) | 10.31857/S0424857024090018 |
| 10. | Identifier | eLIBRARY Document Number (EDN) | OIILFE |
| 11. | Source | Title; vol., no. (year) | Èlektrohimiâ; Vol 60, No 9 (2024) |
| 12. | Language | English=en | ru |
| 13. | Relation | Supp. Files |
Fig. 1. Micrograph and corresponding energy-dispersive X-ray spectroscopy data of a Ru12 sample. (224KB) Fig. 2. Schematic diagram of an electrochemical cell for studying the sensory properties of the materials under study. (66KB) Fig. 3. X-ray diffraction patterns of the platinized oxides under study. Bar diagrams of TiO2 (rutile and anatase) and metallic platinum are provided for comparison. (136KB) Fig. 4. Micrographs of Ru3 and Ru4 samples (a) and the distribution of Pt particles by size for the studied Rux electrocatalysts (b). (389KB) Fig. 5. XPS spectra of Pt 4f of the studied electrocatalysts. (127KB) Fig. 6. Example of change in carbon monoxide concentration and open circuit voltage of a sensor cell with a working electrode based on Ru1 over time. (77KB) Fig. 7. Time curves of the dependence of the change in the open-circuit voltage of the sensors with the studied electrocatalysts with an increase in the concentration of hydrogen in the air from 400 to 4,000 ppm: experimental (gray dots) and calculated curves according to formula (2) (black lines). The dotted lines indicate the relaxation times. (75KB) Fig. 8. Concentration dependences of the final open-circuit voltage of sensors with the studied electrocatalysts (dots are experimental data, solid lines are approximations by equation (3), dotted lines are lines for ease of visual perception). (164KB) Fig. 9. Dependences of the open-circuit voltage of the sensors on the H2 concentration for sensors with a working electrode based on Ru0 (a), Ru1 (b) and Ru12 (c) in their simultaneous presence in the air flow. (215KB) |
| 14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
| 15. | Rights | Copyright and permissions |
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