Atomically dispersed Pt and Fe sites and Pt–Fe nanoparticles for durable proton exchange membrane fuel cells
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
- 0.206 · 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 Proton exchange membrane fuel cells convert hydrogen and oxygen into electricity without emissions. The high cost and low durability of Pt-based electrocatalysts for the oxygen reduction reaction hinder their wide application, and the development of non-precious metal electrocatalysts is limited by their low performance. Here we design a hybrid electrocatalyst that consists of atomically dispersed Pt and Fe single atoms and Pt–Fe alloy nanoparticles. Its Pt mass activity is 3.7 times higher than that of commercial Pt/C in a fuel cell. More importantly, the fuel cell with a low Pt loading in the cathode (0.015 mg Pt cm −2 ) shows an excellent durability, with a 97% activity retention after 100,000 cycles and no noticeable current drop at 0.6 V for over 200 hours. These results highlight the importance of the synergistic effects among active sites in hybrid electrocatalysts and provide an alternative way to design more active and durable low-Pt electrocatalysts for electrochemical devices.
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 Catalysis
- Topic
- Electrocatalysts for Energy Conversion
- Field
- Energy
- Canadian institutions
- —
- Funders
- Argonne National LaboratoryShenzhen Municipal Science and Technology Innovation CouncilSouthern University of Science and TechnologyOffice of ScienceHong Kong University of Science and TechnologyInnovation and Technology CommissionCanadian Light SourceU.S. Department of EnergyCanada Excellence Research Chairs, Government of CanadaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou)National Supercomputer Centre in Guangzhou
- Keywords
- Proton exchange membrane fuel cellElectrocatalystMaterials scienceCathodeChemical engineeringElectrochemistryDurabilityCatalysisFuel cellsNanoparticleNanotechnologyChemistryElectrodeComposite materialOrganic chemistry
- Has abstract in OpenAlex
- yes