Nanocasting SiO2 into metal–organic frameworks imparts dual protection to high-loading Fe single-atom electrocatalysts
Why is this work in the frame?
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
- Teacher spread
- 0.236 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
Abstract Single-atom catalysts (SACs) have sparked broad interest recently while the low metal loading poses a big challenge for further applications. Herein, a dual protection strategy has been developed to give high-content SACs by nanocasting SiO 2 into porphyrinic metal–organic frameworks (MOFs). The pyrolysis of SiO 2 @MOF composite affords single-atom Fe implanted N-doped porous carbon (Fe SA –N–C) with high Fe loading (3.46 wt%). The spatial isolation of Fe atoms centered in porphyrin linkers of MOF sets the first protective barrier to inhibit the Fe agglomeration during pyrolysis. The SiO 2 in MOF provides additional protection by creating thermally stable FeN 4 /SiO 2 interfaces. Thanks to the high-density Fe SA sites, Fe SA –N–C demonstrates excellent oxygen reduction performance in both alkaline and acidic medias. Meanwhile, Fe SA –N–C also exhibits encouraging performance in proton exchange membrane fuel cell, demonstrating great potential for practical application. More far-reaching, this work grants a general synthetic methodology toward high-content SACs (such as Fe SA , Co SA , Ni SA ).
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
The record
- Venue
- Nature Communications
- Topic
- Electrocatalysts for Energy Conversion
- Field
- Energy
- Canadian institutions
- —
- Funders
- Basic Energy SciencesFundamental Research Funds for the Central UniversitiesOffice of ScienceUniversity of Science and Technology of ChinaSalt Science Research FoundationChina Postdoctoral Science FoundationNational Synchrotron Radiation LaboratoryNational Natural Science Foundation of ChinaCanadian Light SourceU.S. Department of Energy
- Keywords
- PyrolysisMetal-organic frameworkMaterials scienceChemical engineeringCatalysisCarbon fibersNanotechnologyMetalEconomies of agglomerationPorosityFuel cellsPorphyrinComposite numberChemistryMetallurgyPhotochemistryPhysical chemistryOrganic chemistryComposite materialAdsorption
- Has abstract in OpenAlex
- yes