Metallic 1T phase MoS<sub>2</sub> nanosheets as a highly efficient co-catalyst for the photocatalytic hydrogen evolution of CdS nanorods

Du, Ping; Zhu, Yuanzhi; Zhang, Junyang; Xu, Da‐Zhen; Peng, Wenchao; Zhang, Guoliang; Zhang, Fengbao

doi:10.1039/c6ra10170d

Cited by 51 publications

(28 citation statements)

References 49 publications

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“…For MoS 2 photocatalyst, researchers including Ho et al observed the correlation between HER activity and exposure level of MoS 2 edge site, which helped to embody the effect of MoS 2 structural characteristics on HER performance [76]. The charge transfer characteristics and the internal resistance of the TM(D)C material combined with Si have been studied by many researchers [77][78][79] revealing the relationship between the surface modulation and kinetic enhancement. In the case of Si photoelectrode modified by MoS 2, the performance and catalytic properties tend to be affected by its thickness [79,80].…”

Section: Electrochemical Impedance Spectroscopy (Eis) For Photoelectrmentioning

confidence: 99%

“…The charge transfer characteristics and the internal resistance of the TM(D)C material combined with Si have been studied by many researchers [77][78][79] revealing the relationship between the surface modulation and kinetic enhancement. In the case of Si photoelectrode modified by MoS 2, the performance and catalytic properties tend to be affected by its thickness [79,80]. the correlation between HER activity and exposure level of MoS2 edge site, which helped to embody the effect of MoS2 structural characteristics on HER performance [76].…”

Section: Electrochemical Impedance Spectroscopy (Eis) For Photoelectrmentioning

confidence: 99%

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Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview

et al. 2019

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In the photoelectrochemical (PEC) water splitting (WS) reactions, a photon is absorbed by a semiconductor, generating electron-hole pairs which are transferred across the semiconductor/electrolyte interface to reduce or oxidize water into oxygen or hydrogen. Catalytic junctions are commonly combined with semiconductor absorbers, providing electrochemically active sites for charge transfer across the interface and increasing the surface band bending to improve the PEC performance. In this review, we focus on transition metal (di)chalcogenide [TM(D)C] catalysts in conjunction with silicon photoelectrode as Earth-abundant materials systems. Surprisingly, there is a limited number of reports in Si/TM(D)C for PEC WS in the literature. We provide almost a complete survey on both layered TMDC and non-layered transition metal dichalcogenides (TMC) co-catalysts on Si photoelectrodes, mainly photocathodes. The mechanisms of the photovoltaic power conversion of silicon devices are summarized with emphasis on the exact role of catalysts. Diverse approaches to the improved PEC performance and the proposed synergetic functions of catalysts on the underlying Si are reviewed. Atomic layer deposition of TM(D)C materials as a new methodology for directly growing them and its implication for low-temperature growth on defect chemistry are featured. The multi-phase TM(D)C overlayers on Si and the operation principles are highlighted. Finally, challenges and directions regarding future research for achieving the theoretical PEC performance of Si-based photoelectrodes are provided.

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Section: Electrochemical Impedance Spectroscopy (Eis) For Photoelectrmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopy (Eis) For Photoelectrmentioning

confidence: 99%

Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview

et al. 2019

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“…Working with phase engineering involves taking advantage of innate properties for the desired processes. Du and co‐workers have pointed out that photocatalytic hydrogen evolution under visible‐light irradiation could increase by a factor of 35 with an optimized 1T‐MoS 2 /CdS NR hybrid system compared with the pure CdS NR system. Such an improvement was attributed to the variation of the 1T‐MoS 2 nanosheets.…”

Section: Spe For Redox Processesmentioning

confidence: 99%

“…Du et al have synthesized 1T‐MoS 2 /CdS NRs and 2H‐MoS 2 /CdS NR hybrids with various phases of MoS 2 nanosheets using hydrothermal methods. With a 10 wt% 1T‐MoS 2 /CdS nanorod heterojunction, the hydrogen generation rate was 794.93 µmol g −1 h −1 , which was ≈35‐fold and 4.5‐fold higher than that of pristine CdS nanorods (22.51 µmol g −1 h −1 ) and 2H‐MoS 2 /CdS nanorods (175.82 µmol g −1 h −1 ), respectively.…”

Section: Spe For Energy Conversion and Environmental Treatmentmentioning

confidence: 99%

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Uddin

Zhang

et al. 2020

Advanced Materials

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The structure–property engineering of phase‐based materials for redox‐reactive energy conversion and environmental decontamination nanosystems, which are crucial for achieving feasible and sustainable energy and environment treatment technology, is discussed. An exhaustive overview of redox reaction processes, including electrocatalysis, photocatalysis, and photoelectrocatalysis, is given. Through examples of applications of these redox reactions, how structural phase engineering (SPE) strategies can influence the catalytic activity, selectivity, and stability is constructively reviewed and discussed. As observed, to date, much progress has been made in SPE to improve catalytic redox reactions. However, a number of highly intriguing, unresolved issues remain to be discussed, including solar photon‐to‐exciton conversion efficiency, exciton dissociation into active reductive/oxidative electrons/holes, dual‐ and multiphase junctions, selective adsorption/desorption, performance stability, sustainability, etc. To conclude, key challenges and prospects with SPE‐assisted redox reaction systems are highlighted, where further development for the advanced engineering of phase‐based materials will accelerate the sustainable (active, reliable, and scalable) production of valuable chemicals and energy, as well as facilitate environmental treatment.

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“…[5][6][7] However, the rapid recombination of the photogenerated charge carriers and photocorrosion under light irradiation limits its wide application in photocatalysis. 8,9 ZnS is known as a wide band-gap semiconductor and is stable and resistant to photocorrosion. 10,11 It has been reported that the coupling of ZnS with CdS greatly enhances the photocatalytic activity for hydrogen generation.…”

Section: Introductionmentioning

confidence: 99%

Structure-controlled CdS(0D, 1D, 2D) embedded onto 2D ZnS porous nanosheets for highly efficient photocatalytic hydrogen generation

Wang

et al. 2017

RSC Adv.

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The morphological characteristics of a photocatalyst is central to its photocatalytic activity for solar energy conversion. Herein, Pt-ZnS/CdS composites comprising ZnS nanosheets, embedded via the geometry and size modulation and tuning of band gap of CdS with 0D, 1D or 2D structure, were investigated for solar hydrogen production. The photoactivity results indicate that the shape and morphology of CdS in the Pt-ZnS/CdS heterojunction play a pivotal role in affecting the photocatalytic performance. CdS with a 1D structure deposited on porous Pt-ZnS nanosheets endow the heterojunction with increased efficiency for the separation and transport of photoinduced electron-hole pairs. The proposed mechanism for the boosted suppression of charge recombination was further confirmed by the transient photocurrent response and photoluminescence.

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Metallic 1T phase MoS₂ nanosheets as a highly efficient co-catalyst for the photocatalytic hydrogen evolution of CdS nanorods

Abstract: A 1T–MoS2/CdS NRs photocatalyst shows enhanced photocatalytic activity because of the ohmic contact with low resistance between 1T–MoS2 and CdS NRs.

Cited by 51 publications

References 49 publications

Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview

Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Structure-controlled CdS(0D, 1D, 2D) embedded onto 2D ZnS porous nanosheets for highly efficient photocatalytic hydrogen generation

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Metallic 1T phase MoS2 nanosheets as a highly efficient co-catalyst for the photocatalytic hydrogen evolution of CdS nanorods

Abstract: A 1T–MoS2/CdS NRs photocatalyst shows enhanced photocatalytic activity because of the ohmic contact with low resistance between 1T–MoS2 and CdS NRs.

Cited by 51 publications

References 49 publications

Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview

Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Structure-controlled CdS(0D, 1D, 2D) embedded onto 2D ZnS porous nanosheets for highly efficient photocatalytic hydrogen generation

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Metallic 1T phase MoS₂ nanosheets as a highly efficient co-catalyst for the photocatalytic hydrogen evolution of CdS nanorods