Journal Article

PUBDB-2022-07486

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fluorine Aided Stabilization of Pt Single Atoms on TiO$_2$ Nanosheets and Strongly Enhanced Photocatalytic H$_2$ Evolution

Wu, S.-M. ; Hwang, I. ; Osuagwu, B. ; Will, J.Extern* ; Wu, Z. ; Sarma, B. B.Extern* ; Pu, F.-F. ; Wang, L.-Y. ; Badura, Z. ; Zoppellaro, G. ; Spiecker, E. ; Schmuki, P. (Corresponding author)Extern*

2022
ACS Washington, DC

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Please use a persistent id in citations: doi:10.1021/acscatal.2c04481  doi:10.3204/PUBDB-2022-07486

Abstract: Trapping sites in single atom (SA) catalysts are critical to the stabilization and reactivity of isolated atoms. Herein, we show that anchoring of Pt SAs on TiO$_2$ nanosheets is strongly aided by lattice incorporated fluorine species. Tailoring the speciation of fluorine on TiO$_2$ nanosheets is a key factor for uniform and stable dispersion of the Pt SAs and high efficiency in Pt SA co-catalyzed photocatalytic H$_2$ production. Fluorine-stabilized uniformly dispersed Pt SAs on the (001) surface of TiO$_2$ can provide a remarkable photocatalytic activity (a H$_2$ production rate of 45.3 mmol h$^{–1}$ mg$^{–1}$ Pt for 65 mW/cm2 365 nm light). This high (maximized) efficiency can be achieved with a remarkably low loading amount of Pt SAs on TiO$_2$ nanosheets (0.03 wt %), which is far superior to Pt nanoparticles on a TiO$_2$ nanosheet with the same or a higher loading amount. F-stabilized Pt SAs on TiO$_2$ nanosheets also exhibit an excellent stability in long-term photocatalytic reactions.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20220538 (I-20220538) (I-20220538)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2022

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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