In situ redispersion of rhodium nanocatalyst for CO2 reforming of CH4
| Autor: | Yu Fu, Wenbo Kong, Jun Zhang, Changkun Yuan, Bingrong Pan, Shuqing Li, He Zhu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Carbon dioxide reforming
Process Chemistry and Technology Nanoparticle chemistry.chemical_element 02 engineering and technology 010501 environmental sciences engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Pollution Redox Rhodium Catalysis Chemical engineering chemistry engineering Chemical Engineering (miscellaneous) Reactivity (chemistry) Noble metal 0210 nano-technology Waste Management and Disposal Carbon 0105 earth and related environmental sciences |
| Zdroj: | Journal of Environmental Chemical Engineering. 9:105790 |
| ISSN: | 2213-3437 |
| Popis: | Noble metal nanoparticles (NPs) exhibit high reactivity towards hydrocarbon reforming, however, suffer from agglomeration and poisoning issues (e.g., carbon deposition). A facile and environmental approach to rejuvenate noble metal catalysts is techniques using thermal redox cycles. Here we demonstrate that in situ thermal oxidative aging and reduction strategy can reverse the sintering of Rh/TiO2 catalyst and meanwhile this redox process significantly affects the catalytic performance towards methane dry reforming (DRM). The oxidative aging process has substantial impact on the mobilization of Rh species across TiO2, and thus the degree of oxymetal activation and the Rh NPs size. In the subsequent reductive process, reduction temperature not only influences oxymetal activation but also the electronic structure of Rh NPs, which directly relates to the carbon formation. |
| Databáze: | OpenAIRE |
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