Dispersing transition metal vacancies in layered double hydroxides by ionic reductive complexation extraction for efficient water oxidation

Xie, Yang-Shan; Wang, Zheng; Jiang, Min; Long, Xia; Yang, Shihe

doi:10.1039/c9sc02723h

Cited by 57 publications

(32 citation statements)

References 52 publications

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“…[ 73 ] Besides, Yang and co‐workers successfully dispersed metal vacancies in TM LDHs via ionic reductive complexation, also exhibiting good electrocatalytic activity. [ 74 ] The promoted performance was ascribed to the lower charge transfer resistance obtained after adjusting the electronic structures.…”

Section: Synthesis and Modificationsmentioning

confidence: 99%

Recent Advance of Transition‐Metal‐Based Layered Double Hydroxide Nanosheets: Synthesis, Properties, Modification, and Electrocatalytic Applications

Liu

Lai

et al. 2021

Advanced Energy Materials

175

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Nowadays, to alleviate the growing pressure of energy shortages and environmental pollution, electrochemical energy conversion is seen as a fossil‐free, secondary pollution‐free, and highly efficiency pathway. Electrocatalysts, as the “heart” of the electrochemical conversion process, play a key role in accelerating reaction rates and promoting efficiency. Transition‐metal‐based layered double hydroxides (TM LDHs), one of the famous electrocatalysts, show unique 2D supermolecular‐stratified structure, excellent electronic properties, and their raw materials are easily available. In this review, electrocatalysis‐related properties of TM LDHs and the state‐of‐the‐art synthesis methods of TM LDH‐based electrocatalysts are summarized. Modifications for promoting the development of TM LDH‐based electrocatalysts are included, such as carbon materials modification, defect engineering, and noble metal loading. Then, the application of TM LDH nanosheets in the field of electrocatalysis is reviewed in detail. Finally, recent challenges, ongoing improvements, and future expectations for TM LDH nanosheets are presented.

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Section: Synthesis and Modificationsmentioning

confidence: 99%

Recent Advance of Transition‐Metal‐Based Layered Double Hydroxide Nanosheets: Synthesis, Properties, Modification, and Electrocatalytic Applications

Liu

Lai

et al. 2021

Advanced Energy Materials

175

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“…Besides anionic vacancies, the catalytic activity can also be regulated by cationic vacancies. 171,172 NiCu LDH with atomically dispersed cation vacancies (SAV-NiCu x LDH) was fabricated via an ionic reductive complexation extraction approach, displaying advanced electrochemical performance toward water oxidation. 171 Compared with NiCu LDH, SAV-NiCu x LDH exhibited greatly enhanced electrical conductivity and optimized binding energy of intermediates during the OER process.…”

Section: Anion And/or Cation Vacanciesmentioning

confidence: 99%

“…171,172 NiCu LDH with atomically dispersed cation vacancies (SAV-NiCu x LDH) was fabricated via an ionic reductive complexation extraction approach, displaying advanced electrochemical performance toward water oxidation. 171 Compared with NiCu LDH, SAV-NiCu x LDH exhibited greatly enhanced electrical conductivity and optimized binding energy of intermediates during the OER process. Apart from single-type vacancies (anionic or cationic) contained electrocatalysts, the dual vacancies could further promote the electrochemical performance.…”

Section: Anion And/or Cation Vacanciesmentioning

confidence: 99%

Design and operando/in situ characterization of precious‐metal‐free electrocatalysts for alkaline water splitting

et al. 2020

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Electrochemical water splitting has attracted considerable attention for the production of hydrogen fuel by using renewable energy resources. However, the sluggish reaction kinetics make it essential to explore precious-metal-free electrocatalysts with superior activity and long-term stability. Tremendous efforts have been made in exploring electrocatalysts to reduce the energy barriers and improve catalytic efficiency. This review summarizes different categories of precious-metal-free electrocatalysts developed in the past 5 years for alkaline water splitting. The design strategies for optimizing the electronic and geometric structures of electrocatalysts with enhanced catalytic performance are discussed, including composition modulation, defect engineering, and structural engineering. Particularly, the advancement of operando/in situ characterization techniques toward the understanding of structural evolution, reaction intermediates, and active sites during the water splitting process are summarized. Finally, current challenges and future perspectives toward achieving efficient catalyst systems for industrial applications are proposed. This review will provide insights and strategies to the design of precious-metalfree electrocatalysts and inspire future research in alkaline water splitting.

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“…The catalytic performance is greatly improved due to the adjustable electronic structure and adjustable surface adsorption/ desorption characteristics and the reduced charge transfer resistance of the catalyst. [59]…”

Section: Solution Treatmentmentioning

confidence: 99%

“…The selected complexing agent can specifically bind and remove the target Cu(II), thereby creating the required vacancy. The catalytic performance is greatly improved due to the adjustable electronic structure and adjustable surface adsorption/desorption characteristics and the reduced charge transfer resistance of the catalyst [59] …”

Section: Strategies For Defects Generationmentioning

confidence: 99%

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

Wang

Liang

Zheng

et al. 2020

Chemistry An Asian Journal

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The applications of many energy-related electrochemical energy conversion and storage devices are changing with each passing day. Oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are the key steps in the commercial application of these energy conversion/storage equipment. Defect-rich transition metal oxides (TMOs), such as Co, Mn, Fe, Ni, etc., have always been one of the most promising electrocatalysts, which are cheap, easy to obtain, high in catalytic activity and stable during electrocatalysis. In this review, we first introduce the definition, classification, characteristics, and construction of defects. Then, the latest developments of defect-rich TMO electrocatalysts in electro-catalysis and energy conversion storage device is summarized. Furthermore, the relationship between defects and activity and the potential mechanism are also discussed. The defects in defect-rich TMOs can adjust the surface/interface electronic structure of the electrocatalyst, change the adsorption energy of the intermediate product, or increase the intrinsic catalytic activity of active sites, which are beneficial for enhanced catalytic performance. Finally, the current challenges and prospects of defect-rich TMO electrocatalysts are proposed. Therefore, the introduction of defects in TMO will be a potential strategy for the rational design of high-performance electrocatalysts in the future.

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Dispersing transition metal vacancies in layered double hydroxides by ionic reductive complexation extraction for efficient water oxidation

Abstract: NiCu LDH with atomic vacancies created via a facile IRCE method shows advanced electrocatalytic performance towards water oxidation.

Cited by 57 publications

References 52 publications

Recent Advance of Transition‐Metal‐Based Layered Double Hydroxide Nanosheets: Synthesis, Properties, Modification, and Electrocatalytic Applications

Recent Advance of Transition‐Metal‐Based Layered Double Hydroxide Nanosheets: Synthesis, Properties, Modification, and Electrocatalytic Applications

Design and operando/in situ characterization of precious‐metal‐free electrocatalysts for alkaline water splitting

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

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