Atomic-scale engineering of chemical-vapor-deposition-grown 2D transition metal dichalcogenides for electrocatalysis

Wang, Qichen; Lei, Yongpeng; Wang, Yuchao; Liu, Yi; Song, Chao; Zeng, Jian; Song, Yaohao; Duan, Xidong; Wang, Dingsheng; Li, Yadong

doi:10.1039/d0ee00450b

Cited by 177 publications

(88 citation statements)

References 177 publications

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“…Lattice strain enables the inert basal plane to be active and could break the linear scaling relationship with the corresponding activity. [ 12,55 ] To address this issue, our engineering presents a strategy for generating spontaneous deformations, using lattice mismatch. Our analysis demonstrates that spontaneous out‐of‐plane deformation facilitates the intrinsic activation of the relaxed lattice.…”

Section: Resultsmentioning

confidence: 99%

Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation

Sim

Yoon

Kang

et al. 2020

Adv Funct Materials

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The structural engineering of 2D layered materials is emerging as a powerful strategy to design catalysts for high‐performance hydrogen evolution reaction (HER). However, the ultimate test of this technology under typical operating settings lies in the reduced performance and the shortened lifespan of these catalysts. Here, a novel approach is proposed to design efficient and robust HER catalysts through out‐of‐plane deformation of 2D heterojunction using metal‐organic chemical vapor deposition. High‐yield, single‐crystalline WTe2 nanobelts are used as an epitaxial template for their coherent conversion to WS2. During the conversion process, the WTe2/WS2 heterostructure containing both lateral and vertical junctions are achieved by coherent heteroepitaxial stacking despite differences in symmetry. The lattice coherency drives out‐of‐plane deformation of heteroepitaxially grown WS2. The increase in the effective surface area and decrease in the electron‐transfer resistance across the 2D heterojunctions in turn enhances the HER performance as well as the long‐term durability of these electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation

Sim

Yoon

Kang

et al. 2020

Adv Funct Materials

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“…Chemical vapor deposition (CVD) is a method by which two or more gaseous raw materials can react to form solid substances and deposit them on the substrate or catalyze other surfaces to obtain solid materials. [ 48 ] CVD technology originated in the past century. Catalysts synthesized by this method have high purity and narrow particle size distribution.…”

Section: Synthesis Methodsmentioning

confidence: 99%

Review on Synthesis and Catalytic Coupling Mechanism of Highly Active Electrocatalysts for Water Splitting

2021

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Hydrogen (H2), derived from electrochemical water splitting, is usually believed to be a promising alternative for fossil energy due to its environmentally friendly and renewable traits. At present, IrO2 and Pt/C are regarded as the state‐of‐the‐art electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively, but their poor durability and high cost severely impede the wide applications. Thus, constructing highly active, stable, and low‐cost electrocatalysts for OER and HER is significantly important. Herein, the synthesis methods, construction of active sites, and catalytic coupling mechanisms for water splitting are fully summarized. In particular, the alloy effect, interface effect, various defects, and doping effects in electrocatalysts are the main reasons to improve the intrinsic catalytic activities. Finally, the future development trend of electrochemical catalysts for water splitting is prospected in the conclusion. It is believed that a comprehensive understanding of materials design strategies is provided, which is beneficial to the development of water splitting.

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“…The electrocatalyst‐containing substrates can be directly employed as electrode for electrocatalysis, which avoids the complicated procedures of electrode manufacture with the use of conductive agent and binder. [ 107,108 ] Conductive substrates generally include carbon‐based substrates (such as carbon cloth, carbon paper and carbon felt) and metal‐based substrates (such as nickel foam, copper foam, iron mesh). By fabricating MOFs directly on conductive substrates, the obtained MOFs/substrates composites can be directly employed as binder free electrode for oxygen electrocatalysis, in which conductive substrates can help the charge transfer of nonconductive MOFs during electrochemical reactions.…”

Section: Pristine Mofsmentioning

confidence: 99%

Modulating Metal–Organic Frameworks as Advanced Oxygen Electrocatalysts

Gao

Feng

et al. 2021

Advanced Energy Materials

112

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Oxygen‐related electrocatalysis, including those used for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), play a central role in green‐energy related technologies. Rational fabrication of effective oxygen electrocatalysts is crucial for the development of oxygen related energy devices, such as fuel cells and rechargeable metal–air batteries. Recently, owing to their tunable compositions and microstructures, metal–organic frameworks (MOFs) based materials have drawn extensive attention as nonprecious oxygen electrocatalysts. Various strategies have been developed to fabricate MOF‐based electrocatalysts and regulate their active sites, such as heterometal doping, defect engineering, morphology tuning, heterostructure construction, and hybridization. In this review, by focusing on various modulation strategies aiming at active sites, the recent advances of MOF‐based electrocatalysts are summarized. The synthetic methods used to synthesize various MOF‐based oxygen electrocatalysts are discussed, followed by the underlying engineering mechanisms required to allow performance enhancement, and finally some existing challenges that hinder for their practical applications are discussed alongside a perspective on their possible future.

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Atomic-scale engineering of chemical-vapor-deposition-grown 2D transition metal dichalcogenides for electrocatalysis

Abstract: Focusing on the atomic-scale engineering of CVD grown 2D TMDs, we discuss the six engineering strategies to tailor the electronic structure, conductivity and electrocatalytic properties in detail. Finally, challenges and perspectives are addressed.

Cited by 177 publications

References 177 publications

Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation

Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation

Review on Synthesis and Catalytic Coupling Mechanism of Highly Active Electrocatalysts for Water Splitting

Modulating Metal–Organic Frameworks as Advanced Oxygen Electrocatalysts

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