Photocatalytic activity of layered perovskite-like oxides in practically valuable chemical reactions

Rodionov, Ivan A.; Zvereva, Irina A.

doi:10.1070/rcr4547

Cited by 95 publications

(44 citation statements)

References 32 publications

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“…In addition, the high stability of LTO is beneficial to the electrocatalytic performance and stability of the DMFCs. For example, we used 2D LTO as a support to deposit the ultrasmall Pt nanoparticles and further found that the as‐prepared Pt‐LTO modified electrode showed an evidently improved electrocatalytic activity toward the methanol oxidation reaction (MOR) . However, the wide bandgap (3.4 eV) of LTO makes it respond only to the UV light region (less than 5% of the solar light), limiting its practical application.…”

Section: Introductionmentioning

confidence: 99%

CdS Quantum Dots Sensitized 2D La₂Ti₂O₇ Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

Wang

Zhai

et al. 2019

Energy Tech

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The heterojunction of cadmium sulfide (CdS)/La2Ti2O7 (CdS/LTO) attracts great attention in the application of photocatalysis. Here, it is used as a visible light–activated support and extends to the application of direct methanol fuel cells (DMFCs). First, uniform CdS quantum dots (QDs) are deposited on the surface of 2D perovskite‐type LTO nanosheets to form the CdS QDs/LTO heterojunction. Then, Pt electrocatalysts are deposited on the as‐prepared CdS QDs/LTO heterojunction and used as a working electrode for the application of the methanol oxidation reaction (MOR). With the assistance of visible light irradiation, the as‐prepared electrode shows 2.2 times enhanced activity toward MOR than that under the dark condition. Moreover, compared to Pt on the surface of LTO, the introduced CdS QDs not only improve the electrode's visible light response, but also facilitate charge separation via a type II heterojunction structure. This work provides a new insight into the development of highly efficient CdS/La2Ti2O7 for applications in DMFCs and beyond.

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Section: Introductionmentioning

confidence: 99%

CdS Quantum Dots Sensitized 2D La₂Ti₂O₇ Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

Wang

Zhai

et al. 2019

Energy Tech

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“…In the past few years, a large number of 2D semiconductor materials, such as g‐C 3 N 4 , BiOX (X: Cl, Br, I), BiVO 4 , black phosphorus, MXenes, layered perovskite‐like oxides, etc., have been studied in the field of photocatalysis due to their unique 2D morphologies, large surface areas, and excellent optical and electrical properties . In the various 2D semiconductors, bismuth‐based oxide materials have been regarded as good candidates.…”

Section: Introductionmentioning

confidence: 99%

2D Semiconductor Bi₂WO₆ Nanosheets as the Pt Carriers for Ethylene Glycol Oxidation Reaction with Photoelectric Interaction

et al. 2019

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Ethylene glycol oxidation reaction (EGOR) is a key anode reaction in direct ethylene glycol fuel cells (DEGFCs). Herein, 2D semiconductor bismuth tungstate (Bi2WO6) nanosheets are facilely prepared and used as carriers for the deposition of platinum nanoparticles (Pt NPs). The resultant material is used as the working electrode in the application of DEGFCs. Due to the excellent absorption property of Bi2WO6 in visible light, the optimized Pt‐Bi2WO6 electrode (Pt at 20 wt%) shows improved catalytic activity and stability with visible‐light illumination. The current density using the Pt‐Bi2WO6 electrode reaches 492.5 mA mg−1Pt with visible‐light irradiation, which is about 4.2 fold higher in comparison with the same electrode in dark conditions. This 2D sheet‐like support, together with the visible‐light response of Bi2WO6, induces the deposition of ultra‐small sizes of Pt (5.4 nm) and the synergistic effect of electrocatalytic and photocatalytic ethylene glycol oxidation, thus greatly improving the photoelectric catalytic property of EGOR.

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“…Layered oxides represent a unique class of photocatalysts, which have the abilities to intercalate substrate molecules into the interlayer space, to exchange interlayer cations for different structural units and to undergo the exfoliation process with the formation of oxide nanosheets [6]. These properties already allowed creating highly efficient photocatalytic systems and open-wide possibilities in the future [7].…”

Section: Introductionmentioning

confidence: 99%

“…During the past years, the K 2 La 2 Ti 3 O 10 layered oxide has become a popular research object as a photocatalyst [7], but, surprisingly, Rb 2 La 2 Ti 3 O 10 did not, despite that it has initially demonstrated much higher photocatalytic performance. This fact may be associated with a higher cost of rubidium in comparison with potassium.…”

Section: Introductionmentioning

confidence: 99%

Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production

Rodionov

Sokolova

Silyukov

et al. 2017

International Journal of Photoenergy

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The Rb 2 La 2 Ti 3 O 10 layered oxide was synthesized by the solid-state method. Three phases with different protonation degrees and intercalated water contents were obtained from the initial compound by the treatment with distilled water and hydrochloric acid. The obtained samples were characterized by powder X-ray diffraction, SEM, X-ray microanalysis, BET, DRS, and TG. It was found that the complete ion exchange of Rb + for H + in the layered oxide Rb 2 La 2 Ti 3 O 10 proceeds through the formation of two metastable intermediate phases with average protonation degrees of 0.5 and 0.75, which successively transform from one to another. Each of these phase transformations is accompanied not only by the contraction of the interlayer distance but also by the displacement of adjacent perovskite layers by 1/2 of the cell parameter which results in the change in the space group. The photocatalytic activity of obtained samples decreases with the increase in the protonation degree, which correlates with the decrease in the intercalated water content.

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Photocatalytic activity of layered perovskite-like oxides in practically valuable chemical reactions

Cited by 95 publications

References 32 publications

CdS Quantum Dots Sensitized 2D La₂Ti₂O₇ Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

CdS Quantum Dots Sensitized 2D La₂Ti₂O₇ Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

2D Semiconductor Bi₂WO₆ Nanosheets as the Pt Carriers for Ethylene Glycol Oxidation Reaction with Photoelectric Interaction

Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production

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Photocatalytic activity of layered perovskite-like oxides in practically valuable chemical reactions

Cited by 95 publications

References 32 publications

CdS Quantum Dots Sensitized 2D La2Ti2O7 Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

CdS Quantum Dots Sensitized 2D La2Ti2O7 Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

2D Semiconductor Bi2WO6 Nanosheets as the Pt Carriers for Ethylene Glycol Oxidation Reaction with Photoelectric Interaction

Protonation and Photocatalytic Activity of the Rb2La2Ti3O10 Layered Oxide in the Reaction of Hydrogen Production

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CdS Quantum Dots Sensitized 2D La₂Ti₂O₇ Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

CdS Quantum Dots Sensitized 2D La₂Ti₂O₇ Nanosheets as Support for Visible Light‐Assisted Electrocatalytic Methanol Oxidation in Alkaline Medium

2D Semiconductor Bi₂WO₆ Nanosheets as the Pt Carriers for Ethylene Glycol Oxidation Reaction with Photoelectric Interaction

Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production