Enhanced photocatalytic H<sub>2</sub> evolution over covalent organic frameworks through an assembled NiS cocatalyst

Zhang, Hualei; Lin, Zheng

doi:10.1039/d2ra02236b

Cited by 7 publications

(5 citation statements)

References 52 publications

(67 reference statements)

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“…The heterostructure shows HER activity up to 3.84 mmol h −1 g −1 under visible light irradiation (Figure 6g). [68] All these results suggest that, as in many of the well-studied heterostructure photocatalysts, some metal sulfides are promising candidates to replace Pt in photocatalytic HER for COF. It is expected that more metal sulfides, especially the 2D nanosheets, could be explored as Pt-free photocatalytic HER cocatalysts for COF.…”

Section: Photocatalytic Her Based On Cof/mss Heterostructurementioning

confidence: 97%

Covalent Organic Frameworks Based Heterostructure in Solar‐To‐Fuel Conversion

Chen

Yuan

Wang

2023

Adv Funct Materials

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Photocatalytic reactions for fuel generation are crucial for the world's energy needs. Covalent‐Organic‐Frameworks (COFs) have been extensively studied as promising designable photocatalysts for these reactions due to their efficient visible‐light absorption, suitable energy‐band structure, facilitated intramolecular charge separation, and fast mass transfer. However, the activities of pristine COFs remain unsatisfactory, due to intermolecular charge recombination. Recently, COF‐based heterostructures, which combine COFs with metal‐sulfides, metal‐oxides, carbon materials, or MOFs, have attracted increasing attention for enhancing solar‐to‐fuel conversion efficiency by facilitating interfacial photo‐generated carrier separation, sensitizing wide‐gap semiconductors, and promoting surface redox reactions. Thus, a review of the state‐of‐the‐art progress of COF‐based heterostructure photocatalysts in reactions such as H2 evolution, CO2 reduction, O2 evolution, H2O splitting and CO2 splitting is crucial for the design of new photocatalysts to promote solar‐to‐fuel conversion. In this review, the COF‐based heterostructures photocatalysts are highlighted based on their synthesis, properties, and reasons for enhanced activities. Moreover, design principles are raised for such photocatalysts for each fuel generation reaction, based on insights into related research. Finally, this review is concluded by proposing future trends for COF‐based heterostructures photocatalysts, with attention to the design of COFs and supports, analyzing the photocatalytic reaction dynamics, together with considering practical applications.

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Section: Photocatalytic Her Based On Cof/mss Heterostructurementioning

confidence: 97%

Covalent Organic Frameworks Based Heterostructure in Solar‐To‐Fuel Conversion

Chen

Yuan

Wang

2023

Adv Funct Materials

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“…Dramatic increment was observed for the CdS-COF hybrid, and the optimum H 2 generation was found when the CdS to COF ratio was maintained at 90:10 (wt %). Conversely, Zhang et al examined the potential of NiS as a cocatalyst . A typical TpBD COF was synthesized and loaded with NiS to result in NiSX-BD composites (X = wt % of NiS).…”

Section: Covalent Organic Framework-based Photochemical Electrochemic...mentioning

confidence: 99%

“…Conversely, Zhang et al examined the potential of NiS as a cocatalyst. 32 A typical TpBD COF was synthesized and loaded with NiS to result in NiSX-BD composites (X = wt % of NiS). TEM analysis of the composite revealed that NiS nanoparticles strongly adhered to the COF surface.…”

Section: Covalent Organic Framework-based Photochemical Electrochemic...mentioning

confidence: 99%

The Synergy of Cocatalysts and Covalent Organic Frameworks for Hydrogen Evolution

Bommakanti

Puthukkudi

Samal

et al. 2023

Crystal Growth & Design

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Hydrogen (H2), the next-generation green fuel, can be obtained by the catalytic splitting of water using solar and electrochemical methods and a combination of both (photoelectrochemical). Among the various porous catalytic water reduction systems developed, covalent organic frameworks (COFs) based systems are emerging in recent times due to their structural ordering and facile tunability, high thermo-chemical stability, and permanent porosity. This review provides a detailed summary and analysis of COF-based photo-, electro-, and photoelectrochemical hydrogen evolution systems. Uniquely, it includes the journey from precious noble metal to earth-abundant molecular cocatalysts for the generation of H2 and their synergetic interaction with COFs. Moreover, the focus is on outlining the core concept of heterogeneous catalytic H2 evolution, measurement techniques, photophysical and physicochemical insights, and the relationship among key components of the overall process. Finally, the advantages and pitfalls of COFs as H2 evolution systems and the design principles for optimal catalytic efficiency are discussed. A dedicated outlook section is presented at the end to benefit researchers for future developments in this emerging field.

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“…The surface of NiS is easily functionalized by some groups, which can better combine with other semiconductor materials. [43,44] Several reviews have been published for the elimination of pollutants using photocatalysis technology with cocatalysts. Sharma et al [45] presented the synthesis strategy and structural properties of NiS photocatalysts and summarized the different types of heterojunctions of NiS with metal, metal oxide, and carbide.…”

Section: Introductionmentioning

confidence: 99%

“…The surface of NiS is easily functionalized by some groups, which can better combine with other semiconductor materials. [ 43,44 ]…”

Section: Introductionmentioning

confidence: 99%

Research Progress of NiS Cocatalysts in Photocatalysis

Gu,

Lin,

et al. 2024

Physica Status Solidi (a)

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In recent decades, photocatalysis technology, a typical mild and environmentally friendly technique, can use sunlight to drive the oxidation/reduction reactions on the surface of catalysts. However, single semiconductor materials can hardly meet the requirements of photocatalytic application due to the low availability of visible light, quick e− − h+ recombination, and the insufficiency of active sites. Cocatalysts are often introduced to solve the above problems. Among the numerous cocatalysts, NiS cocatalysts exhibit excellent properties, such as superior chemical stability, suitable band structure, and larger specific surface area, which can improve the photocatalytic efficiency of various semiconductors. Herein, the research progress of NiS cocatalysts in photocatalysis is reviewed. First, the structure of NiS and several common preparation methods are briefly introduced. Second, the NiS cocatalytic principle about how to achieve the effective separation of photogenerated carriers is introduced. Third, the methods to optimize the catalytic activity of NiS are mainly summarized. At the same time, the review summarizes the research progress of composite photocatalysts based on NiS cocatalyst. Finally, the review discusses the existing challenges and obstacles of NiS‐based photocatalytic systems and proposes feasible improvements and ideas to meet the future requirements of practical applications.

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Enhanced photocatalytic H₂ evolution over covalent organic frameworks through an assembled NiS cocatalyst

Abstract: We constructed a novel hybrid photocatalyst by assembling NiS through a milder method. Under visible light irradiation, controlled NiS/TpBD-COF composites can readily optimize photocatalytic performances without a noble cocatalyst.

Cited by 7 publications

References 52 publications

Covalent Organic Frameworks Based Heterostructure in Solar‐To‐Fuel Conversion

Covalent Organic Frameworks Based Heterostructure in Solar‐To‐Fuel Conversion

The Synergy of Cocatalysts and Covalent Organic Frameworks for Hydrogen Evolution

Research Progress of NiS Cocatalysts in Photocatalysis

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Enhanced photocatalytic H2 evolution over covalent organic frameworks through an assembled NiS cocatalyst

Abstract: We constructed a novel hybrid photocatalyst by assembling NiS through a milder method. Under visible light irradiation, controlled NiS/TpBD-COF composites can readily optimize photocatalytic performances without a noble cocatalyst.

Cited by 7 publications

References 52 publications

Covalent Organic Frameworks Based Heterostructure in Solar‐To‐Fuel Conversion

Covalent Organic Frameworks Based Heterostructure in Solar‐To‐Fuel Conversion

The Synergy of Cocatalysts and Covalent Organic Frameworks for Hydrogen Evolution

Research Progress of NiS Cocatalysts in Photocatalysis

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Enhanced photocatalytic H₂ evolution over covalent organic frameworks through an assembled NiS cocatalyst