Photoinduced semiconductor-metal transition in ultrathin troilite FeS nanosheets to trigger efficient hydrogen evolution

Zhou, Gang; Shan, Yun; Wang, Longlu; Hu, Youyou; Guo, Junhong; Hu, Fangren; Jin, Shangtai; Gu, Yu; Cui, Jingteng; Liu, Lizhe; Wu, Xiaohong

doi:10.1038/s41467-019-08358-z

Cited by 153 publications

(75 citation statements)

References 39 publications

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“…Most strikingly, we find that the mode of Pt−MoS 2 nanosheets exhibits a blueshift as compared to bulk MoS 2 . In contrast, a redshift was reported in earlier studies of pure MoS 2 monolayer . For Pt−MoS 2 nanosheets, the rates of frequency change of

E_{2 g}^{1}

and

A_{1 g}

modes are both at 2.9 cm −1 , which are also different from the previous study of pure MoS 2 samples with a value twice as large for

A_{1 g}

as for

E_{2 g}^{1}

.…”

Section: Resultscontrasting

confidence: 99%

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos₂ Nanosheets and Application in HER

Liao

Zhang

et al. 2020

ChemNanoMat

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Recently, asymmetrically functionalized two‐dimensional (2D) nanomaterials have attracted fevered interest as excellent candidates for building blocks of multifunctional and multidimensional systems due to the structural symmetry‐breaking. However, their preparation process typically involves high vacuum environment or specific equipment, and the obtained samples have poor stability and low yield. In this study, a facile approach has been developed to achieve the asymmetric deposition of platinum nanoparticles (NPs) onto single side of the molybdenum disulfide (MoS2) nanosheets by pyrogenic decomposition and in‐situ functionalization. By tuning the platinum precursor to MoS2 ratio, the size distribution and morphology of the Pt NPs can be well controlled. The asymmetrical decoration of Pt NPs on MoS2 nanosheets (Pt−MoS2) may result from the superior interactions between Pt NPs and MoS2 basal surface, which are stronger than the van der Waals force between adjacent MoS2 layers. Hydrogen evolution reaction (HER) results show that higher Pt loading yields better HER performance with low overpotential of 120 mV and superior Tafel slope of 28 mV ⋅ dec−1. Significantly, the current synthetic method can be used in the asymmetrical functionalization of other 2D nanosheets as well, and could greatly advance the facile preparation and practical applications of these asymmetric nanostructures.

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E_{2 g}^{1}

and

A_{1 g}

modes are both at 2.9 cm −1 , which are also different from the previous study of pure MoS 2 samples with a value twice as large for

A_{1 g}

as for

E_{2 g}^{1}

.…”

Section: Resultscontrasting

confidence: 99%

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos₂ Nanosheets and Application in HER

Liao

Zhang

et al. 2020

ChemNanoMat

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“…However, supercapacitors always have a low energy density, which is an enormous challenge for their applications. [9] Photoirradiation-mediation recently emerges as a promising strategy to promote the energy conversion and storage applications, such as hydrogen evolution reaction (HER), [10] OER, [11] oxygen reduction reaction, [12][13][14] and rechargeable batteries. [15] For instance, Wang et al obtained an increased power density of Co 3 O 4 /Ni fibers/ graphene electrodes after irradiation in the photo-detecting applications.…”

Section: Introductionmentioning

confidence: 99%

Photocatalysis‐Assisted Co₃O₄/g‐C₃N₄ p–n Junction All‐Solid‐State Supercapacitors: A Bridge between Energy Storage and Photocatalysis

et al. 2020

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Supercapacitors with the advantages of high power density and fast discharging rate have full applications in energy storage. However, the low energy density restricts their development. Conventional methods for improving energy density are mainly confined to doping atoms and hybridizing with other active materials. Herein, a Co 3 O 4 /g-C 3 N 4 p-n junction with excellent capacity is developed and its application in an all-solid-state flexible device is demonstrated, whose capacity and energy density are considerably enhanced by simulated solar light irradiation. Under photoirradiation, the capacity is increased by 70.6% at the maximum current density of 26.6 mA cm −2 and a power density of 16.0 kW kg −1. The energy density is enhanced from 7.5 to 12.9 Wh kg −1 with photoirradiation. The maximum energy density reaches 16.4 Wh kg −1 at a power density of 6.4 kW kg −1. It is uncovered that the lattice distortion of Co 3 O 4 , reduces defects of g-C 3 N 4 , and the facilitated photo-generated charge separation by the Co 3 O 4 /g-C 3 N 4 p-n junction all make contributions to the promoted electrochemical storage performance. This work may provide a new strategy to enhance the energy density of supercapacitors and expand the application range of photocatalytic materials.

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“…It is generally accepted that the ΔG H can be used to evaluate the HER activity. The optimal value of ΔG H is zero 34 , where hydrogen is bound neither too strongly nor too weakly. The negative ΔG H (-0.10 eV) in Co 0.5 Fe 0.5 In 2 S 4 implies a not outstanding HER performance due to an existence of rate-limiting potential.…”

Section: Resultsmentioning

confidence: 99%

Spatiotemporal Coupling Dual-photocatalytic Integration in Atomic- hybridized Co0.5Fe0.5In2S4 Nanoflowers for High Efficiency Nitrogen Reduction

Zhou

et al. 2020

Preprint

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The photocatalytic reduction of N2 to NH3 under mild conditions using low-cost solar is an attractive alternative to replace the energy-intensive Haber-Bosch process, but which is typically hampered by poor binding of N2 to catalysts and high activation energy of intermediates. In particular time window, catalyst hydrogenation directly induced by photocatalytic water splitting can provide an alternation pathway to overcome limitations in conventional N2 reduction reaction (NRR). Herein, we propose a spatiotemporal coupling strategy in Co0.5Fe0.5In2S4 ultrathin nanoflowers to integrate hydrogen evolution reaction (HER) and NRR together, in which the photo-excited carrier life time is intentionally extended to match six-electron NRR process; meanwhile hydrogen evolution rate is limited to generate a transient hydrogenation on catalytic surface for accelerating N2 adsorption and activation. This spatiotemporal coupling design can easily drive N2 to *N2H2 and far away from conventional stagewise activation of N≡N triplet bonds. As a result, the photocatalytic performance of N2 reduction is about 85.8 μmol g-1 h-1 without sacrificial agent. Our findings provide a new paradigm for integrating dual photocatalytic reduction, bringing a transient hydrogenation and free nitrogen directly to reactants without requiring N2 molecular adsorption to the catalyst.

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Photoinduced semiconductor-metal transition in ultrathin troilite FeS nanosheets to trigger efficient hydrogen evolution

Cited by 153 publications

References 39 publications

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos₂ Nanosheets and Application in HER

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos₂ Nanosheets and Application in HER

Photocatalysis‐Assisted Co₃O₄/g‐C₃N₄ p–n Junction All‐Solid‐State Supercapacitors: A Bridge between Energy Storage and Photocatalysis

Spatiotemporal Coupling Dual-photocatalytic Integration in Atomic- hybridized Co0.5Fe0.5In2S4 Nanoflowers for High Efficiency Nitrogen Reduction

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Photoinduced semiconductor-metal transition in ultrathin troilite FeS nanosheets to trigger efficient hydrogen evolution

Cited by 153 publications

References 39 publications

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos2 Nanosheets and Application in HER

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos2 Nanosheets and Application in HER

Photocatalysis‐Assisted Co3O4/g‐C3N4 p–n Junction All‐Solid‐State Supercapacitors: A Bridge between Energy Storage and Photocatalysis

Spatiotemporal Coupling Dual-photocatalytic Integration in Atomic- hybridized Co0.5Fe0.5In2S4 Nanoflowers for High Efficiency Nitrogen Reduction

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Product

Resources

About

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos₂ Nanosheets and Application in HER

Facile, Rapid, and Well‐Controlled Preparation of Pt Nanoparticles Decorated on Single Surface of Mos₂ Nanosheets and Application in HER

Photocatalysis‐Assisted Co₃O₄/g‐C₃N₄ p–n Junction All‐Solid‐State Supercapacitors: A Bridge between Energy Storage and Photocatalysis