A Bifunctional CdS/MoO2/MoS2 Catalyst Enhances Photocatalytic H2 Evolution and Pyruvic Acid Synthesis

Bie, Chuanbiao; Zhu, Bicheng; Wang, Linxi; Yu, Huogen; Jiang, Chenhui; Chen, Tao; Yu, Jiaguo

doi:10.1002/anie.202212045

Cited by 199 publications

(69 citation statements)

References 47 publications

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“…Bie et al prepared CdS hollow spheres decorated with MoO 2 and MoS 2 dual cocatalysts (CdMoOS) and found that MoS 2 and MoO 2 were the reduction and oxidation centers of lactic acid (LA)-assisted photocatalytic H 2 production, respectively. 101 The charge dynamics of CdS and CdMoOS with and without LA are studied using fs-TAS. Three signals are observed including the ESA peak at 470 nm, the GSB peak at 520 nm, and the SE peak at 650 nm.…”

Section: Multicomponent Hpsmentioning

confidence: 99%

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

et al. 2023

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Section: Multicomponent Hpsmentioning

confidence: 99%

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

et al. 2023

Self Cite

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“…Recently, Bie et al fabricated hollow CdS/MoO2/MoS2 (CdMoOS) using SiO2 microsphere as a template and chemical vapor deposition methods (Fig. 10a-c) 16 . The hollow CdS/MoO2/MoS2 exhibited high H2 production activity and lactic acid oxidation (Fig.…”

Section: Photocatalytic H2 Production Coupled With Organic Oxidationmentioning

confidence: 99%

“…Nevertheless, the solar-to-H2 conversion efficiency fails to reach 2% owing to SrTiO3:Al with a bandgap of 3.2 eV. To enhance solar energy harvesting, massive narrowbandgap semiconductors, such as CdS 16,17 , Ag3PO4 18 , g-C3N4 19,20 , BiVO4 21 , WO3 22 , Bi2MoO6 23 , ZnIn2S4 24 and have been investigated in the arenas of OWS 25 . Regrettably, the majority of these novel photocatalysts are vulnerable to solar light irradiation and fail to achieve OWS activity 26 .…”

Section: Introductionmentioning

confidence: 99%

Overall Utilization of Photoexcited Charges for Simultaneous Photocatalytic Redox Reactions

Wang¹,

Wang²,

Zhang³

et al. 2022

Acta Physico Chimica Sinica

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The photoconversion of CO2 to carbon-containing fuels, splitting water into H2, selective organic synthesis, reduction of N2 to NH3, and hazardous organic contaminant degradation represent feasible schemes for solving environmental and energy issues. In 1972, TiO2 was applied for decomposing water into H2 and O2 via photocatalysis. Owing to its the low visible-light utilization, fast charge recombination, and high energy barrier for water oxidation, overall photocatalytic water-splitting efficiency is extremely low. Because H2 is more economically valuable than O2, sacrificial agent-assisted photocatalytic H2 evolution has been extensively investigated. Because the sacrificial agent can quickly consume photoexcited holes and effectively reduce the water oxidation energy barrier, photocatalytic H2 evolution efficiency can be increased by 3-4 orders of magnitude compared to photocatalytic water splitting. However, the overuse of sacrificial agents contributes to wasted photoexcited holes and expensive processes, while presenting potential environmental issues. Recently, overall charge utilization and improved redox efficiency have been achieved by coupling photocatalytic reduction with oxidation reactions. Moreover, overall charge utilization can boost charge separation and increase photocatalyst durability. However, the photocatalytic mechanism of the overall redox reactions remains unclear, owing to the complex reaction processes and design difficulties. Herein, the basic principles of photocatalysis are discussed from the perspective of light harvesting, photoexcited charge separation, thermodynamics, and redox reaction kinetics. Photocatalytic redox reactions, including overall water photodecomposition, photocatalytic H2 evolution coupled with organic oxidation, photocatalytic CO2 reduction coupled with organic oxidation, photocatalytic H2O2 production coupled with organic oxidation, photocatalytic N2 reduction coupled with N2 oxidation, and photocatalytic organic reduction coupled with organic oxidation, can be systematically classified according to the coupling of photocatalytic oxidation reactions with photocatalytic reduction reactions. Subsequently, the design of photocatalytic redox reactions is considered in terms of the modulation of photocatalyst materials, reaction conditions, and diversity of reactants and products. In addition, the vital role of density functional theory (DFT) calculations for unveiling photoexcited charge transfer, rate-determining steps, and redox reaction barriers are discussed in the context of the work function, electron density difference, Bader charge, and variation in the intermediate adsorption free energy profiles. The activity and mechanism of various photocatalytic redox reactions were elaborately analyzed through in situ characterizations and DFT calculations using representative cases. Finally, the overall photocatalytic redox reactions were summarized with a focus on the construction of an S-scheme heterojunction photocatalyst, reasonable loading of cocatalysts, photo...

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“…Proverbially, developing stable and high-efficiency visible light photocatalyst is always a core challenge for photocatalysis technology [ 7 , 8 ]. To date, numerous semiconductors—including sulfides, metal oxides, and nitrides—have been extensively exploited for photocatalytic H 2 production [ 9 , 10 , 11 ]. Among the developed photocatalysts, CdIn 2 S 4 (CIS) is of great interest [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Noble-Metal-Free Mo2C/CdIn2S4 Heterojunction Composites with Elevated Carrier Separation for Photocatalytic Hydrogen Production

Qiu

Fan

et al. 2023

Molecules

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Molybdenum-based cocatalyst being used to construct heterojunctions for efficient photocatalytic H2 production is a promising research hotspot. In this work, CdIn2S4 was successfully closely supported on bulk Mo2C via the hydrothermal method. Based on their matching band structures, they formed a Type Ⅰ heterojunction after the combination of Mo2C (1.1 eV, −0.27 V, 0.83 V) and CdIn2S4 (2.3 eV, −0.74 V, 1.56 V). A series of characterizations proved that the heterojunction composite had higher charge separation efficiency compared to a single compound. Meanwhile, Mo2C in heterojunction could act as an active site for hydrogen production. The photocatalytic H2 production activity of the heterojunction composites was significantly improved, and the maximum activity was up to 1178.32 μmmol h−1 g−1 for 5Mo2C/CdIn2S4 composites. 5Mo2C/CdIn2S4 heterojunction composites possess excellent durability in three cycles (loss of 6%). Additionally, the mechanism of increased activity for composites was also investigated. This study provides a guide to designing noble-metal-free photocatalyst for highly efficient photocatalytic H2 evolution.

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A Bifunctional CdS/MoO₂/MoS₂ Catalyst Enhances Photocatalytic H₂ Evolution and Pyruvic Acid Synthesis

Cited by 199 publications

References 47 publications

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Overall Utilization of Photoexcited Charges for Simultaneous Photocatalytic Redox Reactions

Fabrication of Noble-Metal-Free Mo2C/CdIn2S4 Heterojunction Composites with Elevated Carrier Separation for Photocatalytic Hydrogen Production

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