Ru Catalysts Supported on Bamboo-like N-Doped Carbon Nanotubes: Activity and Stability in Oxidizing and Reducing Environment Full article
| Journal |
Materials
ISSN: 1996-1944 |
||
|---|---|---|---|
| Output data | Year: 2023, Volume: 16, Number: 4, Article number : 1465, Pages count : 19 DOI: 10.3390/ma16041465 | ||
| Tags | carbon nanotubes; bamboo-like; nitrogen doping; ruthenium; stability; CWAO; phenol; formic acid; hydrogen | ||
| Authors |
|
||
| Affiliations |
|
Funding (1)
| 1 | Russian Science Foundation | 17-73-30032 |
Abstract:
The catalysts with platinum-group metals on nanostructured carbons have been a very active field of research, but the studies were mainly limited to Pt and Pd. Here, Ru catalysts based on nitrogen-doped carbon nanotubes (N-CNTs) have been prepared and thoroughly characterized; Ru loading was kept constant (3 wt.%), while the degree of N-doping was varied (from 0 to 4.8 at.%) to evaluate its influence on the state of supported metal. Using the N-CNTs afforded ultrafine Ru particles (<2 nm) and allowed a portion of Ru to be stabilized in an atomic state. The presence of Ru single atoms in Ru/N-CNTs expectedly increased catalytic activity and selectivity in the formic acid decomposition (FAD) but had no effect in catalytic wet air oxidation (CWAO) of phenol, thus arguing against a key role of single-atom catalysis in the latter case. A remarkable difference between these two reactions was also found in regard to catalyst stability. In the course of FAD, no changes in the support or supported species or reaction rate were observed even at a high temperature (150 °C). In CWAO, although 100% conversions were still achievable in repeated runs, the oxidizing environment caused partial destruction of N-CNTs and progressive deactivation of the Ru surface by carbonaceous deposits. These findings add important new knowledge about the properties and applicability of Ru@C nanosystems.
Cite:
Korobova A.
, Gromov N.
, Medvedeva T.
, Lisitsyn A.
, Kibis L.
, Stonkus O.
, Sobolev V.
, Podyacheva O.
Ru Catalysts Supported on Bamboo-like N-Doped Carbon Nanotubes: Activity and Stability in Oxidizing and Reducing Environment
Materials. 2023. V.16. N4. 1465 :1-19. DOI: 10.3390/ma16041465 WOS Scopus РИНЦ AN PMID OpenAlex
Ru Catalysts Supported on Bamboo-like N-Doped Carbon Nanotubes: Activity and Stability in Oxidizing and Reducing Environment
Materials. 2023. V.16. N4. 1465 :1-19. DOI: 10.3390/ma16041465 WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Dec 30, 2022 |
| Accepted: | Feb 7, 2023 |
| Published print: | Feb 9, 2023 |
| Published online: | Feb 9, 2023 |
Identifiers:
| Web of science: | WOS:000940746700001 |
| Scopus: | 2-s2.0-85149183409 |
| Elibrary: | 54019907 |
| Chemical Abstracts: | 2023:398746 |
| PMID: | 36837095 |
| OpenAlex: | W4319985431 |