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Single-Atom Pt Stabilized on One-Dimensional Nanostructure Support via Carbon Nitride/SnO 2 Heterojunction Trapping.
- Source :
-
ACS nano [ACS Nano] 2020 Sep 22; Vol. 14 (9), pp. 11394-11405. Date of Electronic Publication: 2020 Aug 26. - Publication Year :
- 2020
-
Abstract
- Catalysis with single-atom catalysts (SACs) exhibits outstanding reactivity and selectivity. However, fabrication of supports for the single atoms with structural versatility remains a challenge to be overcome, for further steps toward catalytic activity augmentation. Here, we demonstrate an effective synthetic approach for a Pt SAC stabilized on a controllable one-dimensional (1D) metal oxide nano-heterostructure support, by trapping the single atoms at heterojunctions of a carbon nitride/SnO <subscript>2</subscript> heterostructure. With the ultrahigh specific surface area (54.29 m <superscript>2</superscript> g <superscript>-1</superscript> ) of the nanostructure, we obtained maximized catalytic active sites, as well as further catalytic enhancement achieved with the heterojunction between carbon nitride and SnO <subscript>2</subscript> . X-ray absorption fine structure analysis and HAADF-STEM analysis reveal a homogeneous atomic dispersion of Pt species between carbon nitride and SnO <subscript>2</subscript> nanograins. This Pt SAC system with the 1D nano-heterostructure support exhibits high sensitivity and selectivity toward detection of formaldehyde gas among state-of-the-art gas sensors. Further ex situ TEM analysis confirms excellent thermal stability and sinter resistance of the heterojunction-immobilized Pt single atoms.
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 14
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 32833436
- Full Text :
- https://doi.org/10.1021/acsnano.0c03687