Single-atom platinum confined by the interlayer nanospace of carbon nitride for efficient photocatalytic hydrogen evolution

Zeng, Zhenxing; Su, Yan; Quan, Xie; Choi, Wonyong; Zhang, Guanghui; Liu, Ning; Kim, Bupmo; Chen, Shuo; Yu, Hongtao; Zhang, Shushen

doi:10.1016/j.nanoen.2019.104409

Cited by 228 publications

(130 citation statements)

References 47 publications

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“…Recently, Zeng et al found that single metal atoms can be confined by the interlayer subnanospace of carbon nitride, which can decrease the aggregation tendency into metal NPs. [149] Using an interlayer confinement strategy, they prepared successfully a single-atom Pt catalyst, which exhibited superior performance for photocatalytic hydrogen evolution.…”

Section: Spatial Confinement Of Single Metal Atomsmentioning

confidence: 99%

“…Adopting an ion-exchange strategy, Zeng and coworkers fabricated an atomically dispersed Pt-based catalyst (SA-Pt/g-C 3 N 4 ) with high Pt loading of 8.7 wt%, where single-atom Pt was confined by g-C 3 N 4 interlayer nanospace. [149] The adjoining layers can strongly keep Pt atoms from being aggregated, further facilitating proton absorption and lowering the energy barrier of H 2 evolution. Under visible-light irradiation, H 2 can be rapidly produced and a stable evolution rate of 22650 μmol g À1 h À1 was achieved, along with an apparent quantum yield of 22.5% at 420 nm ( Figure 12).…”

Section: Single Precious Metal Atoms Anchored By G-c 3 N 4 Substratesmentioning

confidence: 99%

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Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Zhang

Guan

2020

Solar RRL

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Photocatalytic water splitting can realize a direct conversion from solar energy into green hydrogen energy, which is conducive to effectively mitigate energy crisis and environmental issues. Single‐atom catalysts (SACs) have shown great potential in photocatalytic hydrogen evolution, with unique geometric and electronic structures that help to boost mass and charge transfer during photocatalytic processes. Herein, recent advances of SACs in photocatalytic water splitting are focused upon. To decrease aggregation and realize sufficient utilization of metal atoms, different synthesis strategies for SACs are documented. For photocatalytic hydrogen evolution, the catalytic performances, active sites, and structure–property relationships of SACs including Al, Co, Ni, Pd, Ag, and Pt single sites are highlighted. The existing challenges and future directions of SACs in photocatalytic water splitting are provided.

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Section: Spatial Confinement Of Single Metal Atomsmentioning

confidence: 99%

Section: Single Precious Metal Atoms Anchored By G-c 3 N 4 Substratesmentioning

confidence: 99%

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Zhang

Guan

2020

Solar RRL

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“…Currently found photocatalytic materials for water splitting to produce H 2 are very limited. It is known that titanium dioxide (TiO 2 ), [ 3–5 ] graphitic carbon nitride (g‐C 3 N 4 ), [ 6–10 ] metal sulfides (including cadmium sulfide (CdS), and [ 11–13 ] zinc sulfur (ZnS) [ 14–16 ] are typical effective photocatalysts. However, Bi‐based semiconductor materials such as Bi 2 O 2 CO 3 , [ 17–19 ] Bi 2 MoO 6 , [ 20,21 ] Bi 2 WO 6 , [ 22,23 ] and BiOX (X = Cl, Br, and I) [ 24,25 ] as a very important type of photocatalysts only draw considerable attention lately.…”

Section: Introductionmentioning

confidence: 99%

Spatially Separating Redox Centers on Z‐Scheme ZnIn₂S₄/BiVO₄ Hierarchical Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Chen

Zheng

et al. 2020

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Photocatalysis technology using solar energy for hydrogen (H2) production still faces great challenges to design and synthesize highly efficient photocatalysts, which should realize the precise regulation of reactive sites, rapid migration of photoinduced carriers and strong visible light harvest. Here, a facile hierarchical Z‐scheme system with ZnIn2S4/BiVO4 heterojunction is proposed, which can precisely regulate redox centers at the ZnIn2S4/BiVO4 hetero‐interface by accelerating the separation and migration of photoinduced charges, and then enhance the oxidation and reduction ability of holes and electrons, respectively. Therefore, the ZnIn2S4/BiVO4 heterojunction exhibits excellent photocatalytic performance with a much higher H2‐evolution rate of 5.944 mmol g−1 h−1, which is about five times higher than that of pure ZnIn2S4. Moreover, this heterojunction shows good stability and recycle ability, providing a promising photocatalyst for efficient H2 production and a new strategy for the manufacture of remarkable photocatalytic materials.

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“…[ 30–32 ] Recently, subnano metal clusters even single‐atom metal catalysts have showed great advantages due to the high surface free energy, large number of exposed atoms, and unique physical–chemical features over metal nanoparticles. [ 33–35 ] Therefore, to load subnano Ni‐ and Mn‐oxo clusters on UCN with a regulated molar ratio could magnify the modulating and catalytic abilities. What comes to next is that how to realize the size control and high dispersion of synergetic supported bimetallic species.…”

Section: Introductionmentioning

confidence: 99%

Synergetic Subnano Ni‐ and Mn‐Oxo Clusters Anchored by Chitosan Oligomers on 2D g‐C₃N₄ Boost Photocatalytic CO₂ Reduction

Kang

Bai

et al. 2020

Solar RRL

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Synergistic modulation of photogenerated electrons and holes of g‐C3N4 especially achieved by simply modifying bimetallic species is highly desired for efficient photocatalytic CO2 reduction. Herein, ultrasmall subnano Ni‐ and Mn‐oxo clusters (average diameter of ≈0.8 nm) are uniformly anchored on tailored chitosan oligomer (COS)‐functionalized ultrathin g‐C3N4 nanosheets via OH and NH2 in COS as the coordination sites. Optimized Ni and Mn comodified photocatalyst obtained by regulating bimetallic molar ratio exceptionally exhibits 22‐times CO2 conversion rate under solar‐light irradiation and ≈20‐times quantum efficiency at 405 nm light compared with pristine g‐C3N4. By electron paramagnetic resonance, surface photovoltage spectroscopy, fluorescence spectra, photoluminescence spectra, and electrochemical curves, it is evidenced the enhanced photoactivities originate from the synergetic effect between Ni‐ and Mn‐oxo species, capable of photoelectron‐capture along with catalytic CO2 activation and hole‐capture along with catalytic H2O activation, respectively. More importantly, due to the carrier‐modulating capability difference, it is verified only a matching Ni:Mn molar ratio leads to the best charge separation then photoactivity as supported by the transient‐state photoluminescence spectra. A new avenue to rationally modulate photogenerated charge carriers for fabricating efficient g‐C3N4‐based photocatalysts for solar‐fuel production is proposed.

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Single-atom platinum confined by the interlayer nanospace of carbon nitride for efficient photocatalytic hydrogen evolution

Cited by 228 publications

References 47 publications

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Spatially Separating Redox Centers on Z‐Scheme ZnIn₂S₄/BiVO₄ Hierarchical Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Synergetic Subnano Ni‐ and Mn‐Oxo Clusters Anchored by Chitosan Oligomers on 2D g‐C₃N₄ Boost Photocatalytic CO₂ Reduction

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Single-atom platinum confined by the interlayer nanospace of carbon nitride for efficient photocatalytic hydrogen evolution

Cited by 228 publications

References 47 publications

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Spatially Separating Redox Centers on Z‐Scheme ZnIn2S4/BiVO4 Hierarchical Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Synergetic Subnano Ni‐ and Mn‐Oxo Clusters Anchored by Chitosan Oligomers on 2D g‐C3N4 Boost Photocatalytic CO2 Reduction

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Product

Resources

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Spatially Separating Redox Centers on Z‐Scheme ZnIn₂S₄/BiVO₄ Hierarchical Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Synergetic Subnano Ni‐ and Mn‐Oxo Clusters Anchored by Chitosan Oligomers on 2D g‐C₃N₄ Boost Photocatalytic CO₂ Reduction