Interfacial engineering of lattice coherency at ZnO-ZnS photocatalytic heterojunctions

Xue, Sikang; Huang, Weiqiao; Lin, Wei; Xing, Wandong; Shen, Min; Ye, Xiaoyuan; Liang, Xiaocong; Yang, Can; Hou, Yidong; Yu, Zhiyang; Wang, Xinchen

doi:10.1016/j.checat.2021.11.019

Cited by 64 publications

(38 citation statements)

References 52 publications

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“…Tailoring the interfacial interaction between semiconductor photocatalyst and the substrate is considered an important approach in the pursuit of advanced heterogeneous catalysis. The surface properties of the heterogeneous catalyst are crucial because they affect both the substrate-catalyst interaction and the mobility of the charge carriers [19][20][21] . The use of surface properties in heterogeneous catalysts also offers considerable opportunities to facilitate selective organic reactions through modulation of the reaction kinetics.…”

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Photocatalytic cyclization of nitrogen-centered radicals with carbon nitride through promoting substrate/catalyst interaction

et al. 2022

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The use of metal-free carbon nitride and light to drive catalytic transformations constitutes a sustainable strategy for organic synthesis. At the moment, enhancing the intrinsic activity of CN catalysts by tuning the interfacial coupling between catalyst and substrate remains challenging. Herein, we demonstrate that urea-derived carbon nitride catalysts with the abundant −NH2 groups and the relative positive charged surface could effectively complex with the deprotonated anionic intermediate to improve the adsorption of organic reactants on the catalyst surface. The decreased oxidation potential and upshift in its highest occupied molecular orbital position make the electron abstraction kinetics by the catalyst more energetically favorable. The prepared catalyst is thus utilized for the photocatalytic cyclization of nitrogen-centered radicals for the synthesis of diverse pharmaceutical-related compounds (33 examples) with high activity and reusability, which shows competent performance to the homogeneous catalysts.

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confidence: 99%

Photocatalytic cyclization of nitrogen-centered radicals with carbon nitride through promoting substrate/catalyst interaction

et al. 2022

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“…Therefore, it is imperative to develop strategies to manipulate carrier migration with great controllability to inhibit carrier recombination. The construction of internal electric field (IEF) by surface tailoring and interface engineering approaches, including co-catalyst loading 6 , 7 , phase junctions 8 – 14 , heterojunctions 15 – 18 , and facet junctions 19 – 22 , could precisely manipulate the migration of photo-generated electrons (e - ) and holes (h + ) to spatially separated reductive and oxidative sites, thereby enhancing the photocatalytic performance 23 – 29 .…”

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confidence: 99%

Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts

et al. 2022

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Construction of internal electric fields (IEFs) is crucial to realize efficient charge separation for charge-induced redox reactions, such as water splitting and CO2 reduction. However, a quantitative understanding of the charge transfer dynamics modulated by IEFs remains elusive. Here, electron microscopy study unveils that the non-equilibrium photo-excited electrons are collectively steered by two contiguous IEFs within binary (001)/(200) facet junctions of BiOBr platelets, and they exhibit characteristic Gaussian distribution profiles on reduction facets by using metal co-catalysts as probes. An analytical model justifies the Gaussian curve and allows us to measure the diffusion length and drift distance of electrons. The charge separation efficiency, as well as photocatalytic performances, are maximized when the platelet size is about twice the drift distance, either by tailoring particle dimensions or tuning IEF-dependent drift distances. The work offers great flexibility for precisely constructing high-performance particulate photocatalysts by understanding charge transfer dynamics.

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“…32 Heterogeneous semiconductor interfaces with built-in electric fields play a crucial role in facilitating directional electron transfer and accelerating redox kinetics. 33 Therefore, a Mott−Schottky heterojunction that spontaneously generated a built-in electric field could lower the energy barrier for interfacial charge transport and directionally catalyze the oxidation and reduction of sulfur species. Sun et al used N-doped carbon and Co nanoparticles to form Co@NC Mott−Schottky heterojunction, which induced charge redistribution and established a built-in electric field, accelerated the movement of Li + /e − , effectively adsorbed polysulfide, and reduced the reaction energy barrier.…”

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confidence: 99%

ZnFe₂O₄–Ni₅P₄ Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

Zhang

Luo

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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The practical progress of lithium−sulfur batteries is hindered by the serious shuttle effect and the slow oxidation− reduction kinetics of polysulfides. Herein, the ZnFe 2 O 4 −Ni 5 P 4 Mott−Schottky heterojunction material is prepared to address these issues. Benefitting from a self-generated built-in electric field, ZnFe 2 O 4 −Ni 5 P 4 as an efficient bidirectional catalysis regulates the charge distribution at the interface and accelerates electron transfer. Meanwhile, the synergy of the strong adsorption capacity derived from metal oxides and the outstanding catalytic performance that comes from metal phosphides strengthens the adsorption of polysulfides, reduces the energy barrier during the reaction, accelerates the conversion between sulfur species, and further accelerates the reaction kinetics. Hence, the cell with ZnFe 2 O 4 −Ni 5 P 4 / S harvests a high discharge capacity of 1132.4 mAh g −1 at 0.5C and displays a high Coulombic efficiency of 99.3% after 700 cycles. The ZnFe 2 O 4 −Ni 5 P 4 /S battery still maintains a capacity of 610.1 mAh g −1 with 84.4% capacity retention after 150 cycles at 0.1C under a high sulfur loading of 3.2 mg cm −2 . This work provides a favorable reference and advanced guidance for developing Mott− Schottky heterojunctions in lithium−sulfur batteries.

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Interfacial engineering of lattice coherency at ZnO-ZnS photocatalytic heterojunctions

Cited by 64 publications

References 52 publications

Photocatalytic cyclization of nitrogen-centered radicals with carbon nitride through promoting substrate/catalyst interaction

Photocatalytic cyclization of nitrogen-centered radicals with carbon nitride through promoting substrate/catalyst interaction

Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts

ZnFe₂O₄–Ni₅P₄ Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

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Interfacial engineering of lattice coherency at ZnO-ZnS photocatalytic heterojunctions

Cited by 64 publications

References 52 publications

Photocatalytic cyclization of nitrogen-centered radicals with carbon nitride through promoting substrate/catalyst interaction

Photocatalytic cyclization of nitrogen-centered radicals with carbon nitride through promoting substrate/catalyst interaction

Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts

ZnFe2O4–Ni5P4 Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

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ZnFe₂O₄–Ni₅P₄ Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries