Abstract:Noble metal Pt as an efficient cocatalyst is widely utilized in photocatalytic hydrogen (H2) evolution field while its application is restricted by high price and scarcity. Herein, a feasible strategy...
“…The enhanced activity of Cu 2 Ni 1 -ZnIn 2 S 4 photocatalytic hydrogen evolution is mainly attributed to the synergistic effect between Cu and Ni and the spillover effect of H* migration from Ni to Cu. [32] For the purpose of overcoming the weakness of high-speed recombination of electrons and holes on the surface of the photo catalyst, cocatalysts are usually used to inhibit the recombination of electron holes so as to improve the surface reaction efficiency. [33] Recently, there have been more and more reports on the application of transition metal phosphating as a cocatalyst in the field of photocatalysis.…”
Section: Introductionmentioning
confidence: 99%
“…The enhanced activity of Cu 2 Ni 1 ‐ZnIn 2 S 4 photocatalytic hydrogen evolution is mainly attributed to the synergistic effect between Cu and Ni and the spillover effect of H* migration from Ni to Cu. [ 32 ]…”
Section: Introductionmentioning
confidence: 99%
“…[16] In order to improve the efficiency of solar energy for producing hydrogen from water splitting, many methods have been adopted to improve the photocatalytic activity of ZnIn 2 S 4 , such as morphology regulation, [17][18][19] element doping, [20,21] heterojunction construction, [22][23][24][25][26] and loading cocatalysts. [27][28][29][30][31][32] For example, Xing et al reported that ZnIn 2 S 4 flower-like microspheres doped with Mo increased the hydrogen production rate to 4.62 mmol h −1 g −1 , which is 10 times greater than that of pure ZnIn 2 S 4 . [21] Recently, it is reported that a 0D NiSe 2 nanoparticles/2D ZnIn 2 S 4 microflowers heterojunction was designed for enhanced photocatalytic hydrogen evolution.…”
The morphology design and loading of cocatalyst are effective strategies to enhance the light absorption capacity and separation efficiency of photogenerated carriers. This work successfully fabricates amorphous tungsten phosphide (WP)/hierarchical ZnIn2S4 nanoflowers heterostructure (WP/ZnIn2S4) with boosting interfacial charge separation for photocatalytic H2 evolution. The maximum H2 production rate of 6178 µmol g–1 is achieved over 10% WP/ZnIn2S4 photocatalyst within 5 h, which is four times higher than that of pure ZnIn2S4. And a high photostability is also obtained. The enhanced photocatalytic hydrogen evolution activity can be attributed to the synergistic effect of amorphous WP and hierarchical ZnIn2S4 nanoflowers. Amorphous WP as a cocatalyst can rapidly capture photogenerated electrons on the surface of ZnIn2S4, improving the separation of photogenerated electron‐hole pairs. And the ZnIn2S4 microflower with ultrathin nanosheets structure exposes more surface sites to anchor amorphous WP nanoparticles, which provides more active sites for hydrogen evolution. Additionally, amorphous WP greatly increases the light absorption range and prolongs the fluorescence lifetime of ZnIn2S4. This work provides a new idea for designing an effective cocatalyst‐modified semiconductor to improve photocatalytic activity.
“…The enhanced activity of Cu 2 Ni 1 -ZnIn 2 S 4 photocatalytic hydrogen evolution is mainly attributed to the synergistic effect between Cu and Ni and the spillover effect of H* migration from Ni to Cu. [32] For the purpose of overcoming the weakness of high-speed recombination of electrons and holes on the surface of the photo catalyst, cocatalysts are usually used to inhibit the recombination of electron holes so as to improve the surface reaction efficiency. [33] Recently, there have been more and more reports on the application of transition metal phosphating as a cocatalyst in the field of photocatalysis.…”
Section: Introductionmentioning
confidence: 99%
“…The enhanced activity of Cu 2 Ni 1 ‐ZnIn 2 S 4 photocatalytic hydrogen evolution is mainly attributed to the synergistic effect between Cu and Ni and the spillover effect of H* migration from Ni to Cu. [ 32 ]…”
Section: Introductionmentioning
confidence: 99%
“…[16] In order to improve the efficiency of solar energy for producing hydrogen from water splitting, many methods have been adopted to improve the photocatalytic activity of ZnIn 2 S 4 , such as morphology regulation, [17][18][19] element doping, [20,21] heterojunction construction, [22][23][24][25][26] and loading cocatalysts. [27][28][29][30][31][32] For example, Xing et al reported that ZnIn 2 S 4 flower-like microspheres doped with Mo increased the hydrogen production rate to 4.62 mmol h −1 g −1 , which is 10 times greater than that of pure ZnIn 2 S 4 . [21] Recently, it is reported that a 0D NiSe 2 nanoparticles/2D ZnIn 2 S 4 microflowers heterojunction was designed for enhanced photocatalytic hydrogen evolution.…”
The morphology design and loading of cocatalyst are effective strategies to enhance the light absorption capacity and separation efficiency of photogenerated carriers. This work successfully fabricates amorphous tungsten phosphide (WP)/hierarchical ZnIn2S4 nanoflowers heterostructure (WP/ZnIn2S4) with boosting interfacial charge separation for photocatalytic H2 evolution. The maximum H2 production rate of 6178 µmol g–1 is achieved over 10% WP/ZnIn2S4 photocatalyst within 5 h, which is four times higher than that of pure ZnIn2S4. And a high photostability is also obtained. The enhanced photocatalytic hydrogen evolution activity can be attributed to the synergistic effect of amorphous WP and hierarchical ZnIn2S4 nanoflowers. Amorphous WP as a cocatalyst can rapidly capture photogenerated electrons on the surface of ZnIn2S4, improving the separation of photogenerated electron‐hole pairs. And the ZnIn2S4 microflower with ultrathin nanosheets structure exposes more surface sites to anchor amorphous WP nanoparticles, which provides more active sites for hydrogen evolution. Additionally, amorphous WP greatly increases the light absorption range and prolongs the fluorescence lifetime of ZnIn2S4. This work provides a new idea for designing an effective cocatalyst‐modified semiconductor to improve photocatalytic activity.
“… As shown in Figure d, the binding energies of 444.9 and 452.5 eV in In 3d XPS spectra are attributable to In 3d 5/2 and In 3d 3/2. Figure S3 shows the FT-IR spectra of ZnIn 2 S 4 , TCP, and ZIS/TCP. The absorption peak of the pristine TCP at 1467 cm –1 corresponds to the C=C bond of the phenyl ring originated from TCP, and lower absorption peaks at 2852–3028 cm –1 are assigned to the C–H bond .…”
Development of promising photocatalysts with a synergistic effect for hydrogen generation holds paramount significance for solving the global energy problem. Herein, we rationally design a hierarchical heterostructure in which a triptycene covalent polymer (TCP) is grown in situ on ZnIn 2 S 4 through a Suzuki coupling reaction. Assorted experimental results demonstrate that amorphous TCP with a high BET surface area (903 m 2 g −1 ) is embedded on 2D ZnIn 2 S 4 nanoflakes by a self-assembly process, thus indicating the unique hierarchical architecture, high surface area, and large interface contact area. Based on the favorable heterojunction structure, ZnIn 2 S 4 /TCP-2 yields the highest visible-light-derived hydrogen production rate of 1432.8 μmol h −1 g −1 , which is more than 9 times that of bare ZnIn 2 S 4 . The enhanced hydrogen evolution of ZnIn 2 S 4 /TCP comes from the enhanced absorption of visible light, a well-matched band structure, and effective electron transfer. This work provides a promising approach to enhance the solar hydrogen production performance of metal sulfide by using a triptycene covalent polymer.
“…Photocatalytic HER mechanism of (A) Au/ZnIn 2 S 4 . Source : Reproduced with permission: Copyright 2019, Elsevier, 136 (B) CoNi‐ZnIn 2 S 4 . Source : Reproduced with permission: Copyright 2019, American Chemical Society, 138 and (C) Cu 2 Ni 1 ‐ZnIn 2 S 4 . Source : Reproduced with permission: Copyright 2021, Royal Society of Chemistry 139 TEM images of (D) bare ZnIn 2 S 4 , (E) Ni 2 P, and (F) Ni 2 P/ZnIn 2 S 4 .…”
Section: Znin2s4‐based Photocatalysts For Hydrogen Evolution Reaction...mentioning
The gradual depletion of fossil fuel reserves that contribute to $85% of global energy production and release of toxic effluents urges the transformation toward renewable fuels. Thus, the sustainable utilization of sunlight for water splitting and CO 2 reduction with heterogeneous photocatalysts has come to light. As a semiconductor photocatalyst, ZnIn 2 S 4 has hit the limelight owing to its narrow bandgap and visible-light-responsive properties. However, the limitations of ZnIn 2 S 4 include limited active sites, fast charge-carrier recombination, and low photoconversion efficiency. Beginning from the fundamental photocatalytic mechanism, this review then provides in-depth insights into several modification strategies of ZnIn 2 S 4 , extending from defect engineering, facet engineering, cocatalyst loading to junction engineering, enabling the synergistic construction of high-performance ZnIn 2 S 4 -based systems. Subsequently, the structure-performance relation of ZnIn 2 S 4 -based photocatalysts for hydrogen evolution (HER), overall water splitting (OWS), and CO 2 reduction applications in the last 4 years will be discussed and concluded by the future perspectives of this frontier.
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