Loading...
Please wait, while we are loading the content...
Similar Documents
Iron Single Atoms Anchored on Carbon $Matrix/g-C_{3}N_{4}$ Hybrid Supports by Single-Atom Migration-Trapping Based on MOF Pyrolysis
| Content Provider | MDPI |
|---|---|
| Author | Jia, Yining Huang, Rong Qi, Ruijuan |
| Copyright Year | 2022 |
| Description | Numerous efforts have been devoted to realizing the high loading and full utilization of single-atom catalysts (SACs). As one of the representative methods, atom migration-trapping (AMT) is a top-down strategy that converts a certain volume of metal nanoparticles (NPs) or metal-based precursors into mobile metal species at high temperature, which can then be trapped by suitable supports. In this study, high-loading iron single atoms anchored onto carbon $matrix/g-C_{3}N_{4}$ hybrid supports were obtained through a single-atom migration-trapping method based on metal–organic framework (MOF) pyrolysis. It is confirmed, by high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), that the $Fe(acac)_{3}$ precursor is reduced to Fe single atoms (SAs), which are not only anchored onto the original N-doped carbon (NC), but also onto $g-C_{3}N_{4}$, with an Fe-N coordination bond. Further electrochemical results reveal that $Fe-C_{3}N_{4}$-0.075 possesses a better half-wave potential of 0.846 V and onset potential of 0.96 V compared to Fe-N-C, the product obtained after pyrolysis of $Fe(acac)_{3}$@ZIF-8. As opposed to SAs prepared by the pyrolysis process only, SAs prepared by AMT are commonly anchored onto the surface of the supports, which is a simple and effective way to make full use of the source metal and prepare SACs with higher exposing active sites. |
| Starting Page | 1416 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12091416 |
| Journal | Nanomaterials |
| Issue Number | 9 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-20 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Inorganic Chemistry Atom Migration-trapping Single-atom Catalysts Metal–organic Frameworks |
| Content Type | Text |
| Resource Type | Article |
