Cu(II) Oxo/Hydroxides Stabilized by ZSM-5 Zeolite as an Efficient and Robust Catalyst for Chemical and Photochemical Water Oxidation with Ru(bpy)3 3+ Full article
| Journal |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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| Output data | Year: 2021, Volume: 375, Pages: 458-471 Pages count : 14 DOI: 10.1016/j.cattod.2020.07.009 | ||||||
| Tags | Cu(II)-hydroxides, zeolites, photocatalytic water splitting, oxygen evolution reaction, one-electron oxidants | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0014 |
| 2 | Federal Agency for Scientific Organizations | 0356-2016-0503 (АААА-А17-117021310218-7) |
Abstract:
Water oxidation is the bottleneck of the water splitting process. A novel highly efficient and stable for many cycles heterogeneous Cu-contained catalysts supported on MFI-type zeolite (1% Cu-ZSM-5) for water oxidation were prepared. Oxo/hydroxo complexes of copper (II) were stabilized in the zeolite channels via polycondensation. The analysis of the electron states of copper in the Cu-containing zeolite-based catalysts using EPR and UV–vis DR techniques revealed that the catalytic efficiency of Cu(II) state in zeolite grew up in the series: [Cu(NH3)4]2+ < isolated [Cu(H2O)6]2+ << Cu(OH)x-like and CuOx-like nanoclusters in mesopores << CuOx-like and Cu(OH)x-like complexes in channels < [Cu2(OH)2]2+ complexes in channels. The catalyst containing [Cu2(OH)2]2+ complexes in channels provided the yields of oxygen as high as 60 and 64 % of the stoichiometric quantity at pH 9.2–10.0 in the dark reaction with one-electron oxidant Ru(bpy)33+. Nevertheless, Cu(OH)x-like and [Cu2(OH)2]2+ complexes stabilized in the ZSM-5 channels decomposed easily under the conditions of the photocatalytic reaction. At the same time, the oxygen yield reached 92 % in photocatalytic system Ru(bpy)32+/S2O82− in the presence of 1%Cu-ZSM-5 containing CuOx-like complexes stabilized in the channels. The adsorption of Ru(bpy)32+ on the surface of 1%Cu-ZSM-5 containing CuOx-like complexes provided the increase of the reaction rate in 1.6 times and achieved the oxygen yield up to 98 % to stoichiometry. This indicated the strong effect of concurrent processes of Ru(bpy)32+ and Ru(bpy)33+ adsorption/desorption at the catalyst active site on the rate of oxygen evolution.
Cite:
Chikunov A.S.
, Yashnik S.A.
, Taran O.P.
, Kurenkova A.Y.
, Parmon V.N.
Cu(II) Oxo/Hydroxides Stabilized by ZSM-5 Zeolite as an Efficient and Robust Catalyst for Chemical and Photochemical Water Oxidation with Ru(bpy)3 3+
Catalysis Today. 2021. V.375. P.458-471. DOI: 10.1016/j.cattod.2020.07.009 WOS Scopus РИНЦ AN OpenAlex
Cu(II) Oxo/Hydroxides Stabilized by ZSM-5 Zeolite as an Efficient and Robust Catalyst for Chemical and Photochemical Water Oxidation with Ru(bpy)3 3+
Catalysis Today. 2021. V.375. P.458-471. DOI: 10.1016/j.cattod.2020.07.009 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Nov 30, 2019 |
| Accepted: | Jul 16, 2020 |
| Published online: | Jul 27, 2020 |
| Published print: | Sep 1, 2021 |
Identifiers:
| Web of science: | WOS:000668217200004 |
| Scopus: | 2-s2.0-85089249045 |
| Elibrary: | 45372146 |
| Chemical Abstracts: | 2020:1564193 |
| OpenAlex: | W3044657436 |