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Engineering the electronic structure of platinum single-atom sites via tailored porous carbon nanofibers for large-scale hydrogen production.
- Source :
-
Applied Catalysis B: Environmental . Oct2023, Vol. 335, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Pt single-atom catalysts are promising for efficient hydrogen evolution reactions (HER) due to their ultra-high catalytic activity and atomic utilization. However, developing a scalable preparation method of binder-free Pt single-atom catalysts with optimal electronic structures for large-scale hydrogen production is still a serious challenge. In this work, we fabricated tailored nitrogen-doped porous carbon nanofibers as a support for engineering the electronic structure of Pt single-atom sites via initial micropore trapping and subsequent optimized nitrogen/carbon anchoring. The as-prepared Pt single-atom catalysts exhibited impressively enhanced HER activity and satisfactory stability, superior to the state-of-the-art single-atom catalysts. X-ray absorption structure analysis combined with theoretical simulation demonstrated the mechanisms for HER performance improvement. In particular, the free-standing Pt single-atom catalysts for a binder-free electrode showed a low overpotential of 64 mV even at 500 mA cm−2, indicating promising application for the large-scale hydrogen production. [Display omitted] • Tailored nitrogen-doped porous carbon nanofibers were proposed for engineering the electronic structure of Pt single-atom. • The Pt single-atom catalyst exhibited impressively enhanced HER performance, superior to the state-of-the-art catalysts. • Experimental investigations and theoretical calculations revealed the mechanism of Pt single-atom for efficient HER. • The as-prepared Pt single-atom catalyst as a binder-free electrode achieved efficient large-scale hydrogen production. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 335
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 164087440
- Full Text :
- https://doi.org/10.1016/j.apcatb.2023.122898