Journal Article

PUBDB-2025-01354

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A surface reconstruction route for increasingly improved photocatalytic H$_2$O$_2$ production using Sr$_2$Bi$_3$Ta$_2$O$_{11}$Cl

Banoo, M. ; Sah, A. K. ; Roy, R. S.Extern* ; Kaur, K.Extern* ; Kommula, B. ; Sanyal, D. ; Gautam, U. (Corresponding author)Extern*

2024
RSC Cambridge

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Please use a persistent id in citations: doi:10.1039/D4SC04866K  doi:10.3204/PUBDB-2025-01354

Abstract: Photocatalytic hydrogen peroxide (H$_2$O$_2$) generation is attractive for the chemical industry and energy production. However, photocatalysts generally deteriorate significantly during use to limit their application. Here we present highly active Sr$_2$Bi$_3$Ta$_2$O$_{11}$Cl single-crystal nanoplates for conversion of O$_2$ to H$_2$O$_2$ using ambient air with a production rate of ∼3 mmol h$^{−1}$ g$^{−1}$ (maximum 17.5% photon conversion). Importantly, Sr$_2$Bi$_3$Ta$_2$O$_{11}$Cl is not only stable during 30 days of H$_2$O$_2$ production but also gets consistently activated to increase the H$_2$O$_2$ yield by >244%, unlike any other catalyst for H$_2$O$_2$ production. Multi-pronged characterization confirms that the synergistic increase in activity originates from in situ surface reconstruction by oxygen-deficient vacancy associate formation that improves (i) surface oxygen adsorption, (ii) sunlight harvesting, and (iii) charge-transfer from the low-valent metal atoms surrounding oxygen vacancies to reactants. The study establishes the prospects of rational defect engineering for realizing non-degrading photocatalysts for realistic H$_2$O$_2$ production .

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)
3. FS-Proposal: I-20211387 (I-20211387) (I-20211387)
4. FS-Proposal: I-20220874 (I-20220874) (I-20220874)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; IF >= 5 ; Index Chemicus ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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