Interfacial charge and surface defect regulation for high-efficiency CdIn2S4-based photoanodes

Zhu, J.; Cheng, Yufei; Zhang, Wenwan; Zhao, Jianguo; Sun, Qian; Hu, Xiaoyun; Miao, Hui

doi:10.1016/j.apsusc.2022.154188

Cited by 21 publications

(6 citation statements)

References 60 publications

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“…Therefore, for the cocatalyst loading, when the interaction between the photoanode and cocatalyst is weak, the interfacial defect density increases, and many interfacial defects are generated. [ 60 ] Although defects sometimes play a favorable role to enhance the carrier concentration, interfacial defects often function as carrier recombination centers. [ 61 ] Therefore, numerous interfacial defects can produce severe interfacial carrier recombination, which degrades the performance of photoanode devices.…”

Section: Basic Principles For Pec and Cocatalystmentioning

confidence: 99%

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Chen,

Meng,

et al. 2023

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Sluggish oxygen evolution reactions on photoanode surfaces severely limit the application of photoelectrochemical (PEC) water splitting. The loading of cocatalysts on photoanodes has been recognized as the simplest and most efficient optimization scheme, which can reduce the surface barrier, provide more active sites, and accelerate the surface catalytic reaction kinetics. Nevertheless, the introduction of cocatalysts inevitably generates interfaces between photoanodes and oxygen evolution cocatalysts (Ph/OEC), which causes severe interfacial recombination and hinders the carrier transfer. Recently, many researchers have focused on cocatalyst engineering, while few have investigated the effect of the Ph/OEC interface. Hence, to maximize the advantages of cocatalysts, interfacial problems for designing efficient cocatalysts are systematically introduced. In this review, the interrelationship between the Ph/OEC and PEC performance is classified and some methods for characterizing Ph/OEC interfaces are investigated. Additionally, common interfacial optimization strategies are summarized. This review details cocatalyst‐design‐based interfacial problems, provides ideas for designing efficient cocatalysts, and offers references for solving interfacial problems.

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Section: Basic Principles For Pec and Cocatalystmentioning

confidence: 99%

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Chen,

Meng,

et al. 2023

Small

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“…Meanwhile, the EPR test results of the samples with different etching times are shown in Figure S2. The coordination environment of atoms can be observed by EPR, [29] the intensity of the resonance magnetic field reflects the number of unpaired electrons, and the strongest front of the C 0.7 IS-30 curve indicates that its crystal surface has the highest number of unpaired electrons and forms a larger number of S vacancies, C 0.7 IS-30 can provide more active sites. [30] Figure 1 shows the XRD patterns of CdS (Curves 1), C 0.7 IS (Curves 2), and C 0.7 IS-30 (Curves 3).…”

Section: Microscopic Morphology and Structurementioning

confidence: 99%

Synergistic Mechanism of 0D Internal and Surface Defects Regulation Coupled with Pyroelectric Effects for Optimizing the Photoelectrocatalytic Properties of CdS

Chen,

Liu,

Ruan

et al. 2023

ChemCatChem

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Rational defect regulation is an effective way to enhance the performance of photoelectrocatalytic (PEC) water splitting. In this paper, we firstly constructed internal and surface defects to modulate the crystal structure of CdS, and investigated the synergistic impact of 0D (0‐dimensional) internal and surface defects regulation coupled with pyroelectric effects for optimizing the photoelectrocatalytic properties of CdS. It was found that the synergistic impact had a significant enhancement effect on the carrier separation and transfer, and the current density reached 3.93 mA/cm2 at 1.23 V vs. RHE increased by 16.38 times, meanwhile, the stability of the photoelectrodes was greatly promoted. The advantages and intrinsic relationships are also described: the formation of 0D dual‐type of defects alters the atomic arrangement in the crystal, optimizes the energy band structure, reduces carrier recombination, and increases carrier density. What's more, the introduction of defects induces electron redistribution and changes the state of dipoles inside the crystal, thus increasing built‐in electric field and generating more thermally generated carriers to optimize the pyroelectric effect. This work demonstrates the feasibility of defect modulation for optimizing pyroelectric performance and photocatalytic performance and bringing new light to PEC water splitting.

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“…Therefore, the incorporation of other transition metal atoms to form sulfide solid solutions has been developed as a strategy to enhance photocatalytic activity. − The formed sulfide solid solutions have uneven charge distributions resulting in spontaneous polarization, which in turn forms a built-in electric field to promote charge separation and mitigate the recombination . Among them, Zn x Cd 1– x S solid solution has received significant research attention owing to its tunable band edge position and band gap, as well as its simple preparation method and powerful reduction capability. , It is still a grand challenge to further enhance the photocatalytic activity and selectivity for H 2 O 2 production using pristine Zn x Cd 1– x S, despite its stronger photocatalytic activity and reduction capability than CdS.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Photocatalytic H₂O₂ Production over a Zn_0.3Cd_0.7S/MXene Photocatalyst for Degradation of Emerging Pollutants under Visible-Light Irradiation

Yang,

Wang

2024

Langmuir

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Hydrogen peroxide (H 2 O 2 ) is an ideal green product with a broad range of applications, and visible-light-driven photocatalytic H 2 O 2 production is deemed a sustainable and eco-friendly strategy. Herein, various Zn x Cd 1−x S/MXene photocatalysts with a Schottky junction were prepared for photocatalytic H 2 O 2 production. The obtained Zn 0.3 Cd 0.7 S/MXene (ZCM-0.3) hybrid presented the highest photocatalytic H 2 O 2 production rate in pure neutral water of 1160 μmol h −1 g −1 , which was further improved to 2178.58 μmol h −1 g −1 in the presence of isopropanol as the sacrificial reagent. The experimental results demonstrated that the sufficient visible-lightharvesting ability and appropriate conduction band potential of the Zn 0.3 Cd 0.7 S solid solution, the excellent conductivity and two-electron selectivity of MXene, and the construction of Schottky junctions at the Zn 0.3 Cd 0.7 S/MXene interface resulted in the fast transfer and separation of the photogenerated charge carriers and the targeted reduction of oxygen to H 2 O 2 . The photocatalytic mechanism for H 2 O 2 production was studied and proposed. Moreover, a simple photo-Fenton system consisting of Zn x Cd 1−x S/MXene and ferrous ions (Fe 2+ ) was constructed and applied for the degradation of various emerging pollutants, which also performed effectively and exhibited universality across different pollutants. Overall, this study presents a novel and useful strategy to convert solar energy into chemical energy through efficient H 2 O 2 production and provides an effective alternative for the degradation of emerging pollutants.

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Interfacial charge and surface defect regulation for high-efficiency CdIn2S4-based photoanodes

Cited by 21 publications

References 60 publications

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Synergistic Mechanism of 0D Internal and Surface Defects Regulation Coupled with Pyroelectric Effects for Optimizing the Photoelectrocatalytic Properties of CdS

Highly Efficient Photocatalytic H₂O₂ Production over a Zn_0.3Cd_0.7S/MXene Photocatalyst for Degradation of Emerging Pollutants under Visible-Light Irradiation

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Interfacial charge and surface defect regulation for high-efficiency CdIn2S4-based photoanodes

Cited by 21 publications

References 60 publications

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Cocatalysts‐Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights

Synergistic Mechanism of 0D Internal and Surface Defects Regulation Coupled with Pyroelectric Effects for Optimizing the Photoelectrocatalytic Properties of CdS

Highly Efficient Photocatalytic H2O2 Production over a Zn0.3Cd0.7S/MXene Photocatalyst for Degradation of Emerging Pollutants under Visible-Light Irradiation

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Highly Efficient Photocatalytic H₂O₂ Production over a Zn_0.3Cd_0.7S/MXene Photocatalyst for Degradation of Emerging Pollutants under Visible-Light Irradiation