Direct Z-scheme designs perform well in light-to-fuel conversion. Here, an active and stable ternary Z-scheme core-shell heterojunction for photocatalytic hydrogen evolution (PHE) is fabricated consisting of hexagonal 2D α-Fe2O3 (as photocatalyst II) and 2D nitrogen-doped graphene (NGr as photocatalyst I) functionalized with the Pt single-atoms (SAs) cocatalyst. Under visible light, the 2D/2D α-Fe2O3 @NGr3[sbnd]PtSAs (NGr shell thickness of 3 nm and Pt loading of 0.5 wt%) achieves a remarkable PHE of 6.4 µmol mgcat−1 h–1, which is 16.4- and 3.28-times higher than those of free NGr (0.39 µmol mgcat−1 h–1) and binary α-Fe2O3 @NGr3 (1.95 µmol mgcat−1 h–1), thus outperforming the currently-advanced PHE catalysts. The outstanding performance is due to the superiority of a direct 2D/2D Z-scheme core-shell fabrication, including a large surface area for light harvesting, facile charge separation and transfer, and the workability of Pt SAs sites. Theoretical investigations provide additional insight into the mechanistic process of the ternary system for PHE reactions.

Dao, V., Cipriano, L., Ki, S., Yadav, S., Wang, W., Di Liberto, G., et al. (2023). 2D/2D Z-scheme-based α-Fe2O3 @NGr heterojunction implanted with Pt single-atoms for remarkable photocatalytic hydrogen evolution. APPLIED CATALYSIS. B, ENVIRONMENTAL, 330 [10.1016/j.apcatb.2023.122586].

2D/2D Z-scheme-based α-Fe2O3 @NGr heterojunction implanted with Pt single-atoms for remarkable photocatalytic hydrogen evolution

Cipriano L. A.;Di Liberto G.;Pacchioni G.
;
2023

Abstract

Direct Z-scheme designs perform well in light-to-fuel conversion. Here, an active and stable ternary Z-scheme core-shell heterojunction for photocatalytic hydrogen evolution (PHE) is fabricated consisting of hexagonal 2D α-Fe2O3 (as photocatalyst II) and 2D nitrogen-doped graphene (NGr as photocatalyst I) functionalized with the Pt single-atoms (SAs) cocatalyst. Under visible light, the 2D/2D α-Fe2O3 @NGr3[sbnd]PtSAs (NGr shell thickness of 3 nm and Pt loading of 0.5 wt%) achieves a remarkable PHE of 6.4 µmol mgcat−1 h–1, which is 16.4- and 3.28-times higher than those of free NGr (0.39 µmol mgcat−1 h–1) and binary α-Fe2O3 @NGr3 (1.95 µmol mgcat−1 h–1), thus outperforming the currently-advanced PHE catalysts. The outstanding performance is due to the superiority of a direct 2D/2D Z-scheme core-shell fabrication, including a large surface area for light harvesting, facile charge separation and transfer, and the workability of Pt SAs sites. Theoretical investigations provide additional insight into the mechanistic process of the ternary system for PHE reactions.
Articolo in rivista - Articolo scientifico
2D/2D core-shell; Direct Z-scheme; Hematite; Nitrogen-doped graphene; Photocatalytic hydrogen evolution; Single-atoms;
English
11-mar-2023
2023
330
122586
none
Dao, V., Cipriano, L., Ki, S., Yadav, S., Wang, W., Di Liberto, G., et al. (2023). 2D/2D Z-scheme-based α-Fe2O3 @NGr heterojunction implanted with Pt single-atoms for remarkable photocatalytic hydrogen evolution. APPLIED CATALYSIS. B, ENVIRONMENTAL, 330 [10.1016/j.apcatb.2023.122586].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/415866
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