Modulating interfacial charge distribution of single atoms confined in molybdenum phosphosulfide heterostructures for high efficiency hydrogen evolution

Li, Jiachen; Zhang, Chi; Ma, Huijun; Wang, Taihe; Guo, Zhaoqi; Yang, Yong; Wang, Yao‐Yu; Ma, Hua

doi:10.1016/j.cej.2021.128834

Cited by 50 publications

(33 citation statements)

References 63 publications

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“…In addition, Ru-MoS 2 /CC exhibit faster electrode kinetics than MoS 2 -CoS 2 /CC according to Figure 8B . In our viewpoint, the Ru-doped sites can significantly accelerate the sluggish water dissociation in alkaline HER ( Li J. et al, 2021 ).…”

Section: Resultsmentioning

confidence: 98%

“…This indicates that doping Ru can efficiently modulate the electronic features of the adjacent sulfur atoms, thereby leading to the optimal H atom binding energy ( Yan et al, 2018 ). On the other hand, after doping Ru into 2H-MoS 2 ( Li J. et al, 2021 ) or 2H-WS 2 ( Li J. et al, 2022 ), these Ru sites can significantly accelerate the water dissociation in alkaline environments. For example, the energy barrier of the H−OH cleavage ( E ) is as high as 2.42 eV before doping Ru.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Regulation of S-Vacancy of MoS2-Based Materials for Highly Efficient Electrocatalytic Hydrogen Evolution

Zhu

Wang

et al. 2022

Front. Chem.

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Low or excessively high concentration of S-vacancy (CS-vacancy) is disadvantageous for the hydrogen evolution reaction (HER) activity of MoS2-based materials. Additionally, alkaline water electrolysis is most likely to be utilized in the industry. Consequently, it is of great importance for fine-tuning CS-vacancy to significantly improve alkaline hydrogen evolution. Herein, we have developed a one-step Ru doping coupled to compositing with CoS2 strategy to precisely regulate CS-vacancy of MoS2-based materials for highly efficient HER. In our strategy, Ru doping favors the heterogeneous nucleation and growth of CoS2, which leads to a high crystallinity of Ru-doped CoS2 (Ru-CoS2) and rich heterogeneous interfaces between Ru-CoS2 and Ru-doped MoS2-x (Ru-MoS2-x). This facilitates the electron transfer from Ru-CoS2 to Ru-MoS2-x, thereby increasing CS-vacancy of MoS2-based materials. Additionally, the electron injection effect increases gradually with an increase in the mass of Co precursor (mCo), which implies more S2- leaching from MoS2 at higher mCo. Subsequently, CS-vacancy of the as-synthesized samples is precisely regulated by the synergistic engineering of Ru doping and compositing with CoS2. At CS-vacancy = 17.1%, a balance between the intrinsic activity and the number of exposed Mo atoms (EMAs) to boost highly active EMAs should be realized. Therefore, the typical samples demonstrate excellent alkaline HER activity, such as a low overpotential of 170 mV at 100 mA cm−2 and a TOF of 4.29 s−1 at -0.2 V. Our results show promise for important applications in the fields of electrocatalysis or energy conversion.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Synergistic Regulation of S-Vacancy of MoS2-Based Materials for Highly Efficient Electrocatalytic Hydrogen Evolution

Zhu

Wang

et al. 2022

Front. Chem.

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“…Then, the solution was transferred into a 50 mL Teﬂon-lined stainless steel autoclave, which was placed in an electric oven at 220 °C for 24 h. MoS 2 was collected by centrifugation at 8000 rpm for 3 min after the autoclave was cooled to room temperature, and the sediment was rinsed with DI water and ethanol three times. Finally, the MoS 2 powder was dried at 60 °C [ 34 ]. To obtain MoS 2 @TA/Fe NSs, 100 mg of MoS 2 was dispersed in DI water and stirred for 10 min, then 2 mL of a TA solution (40 mg/mL) was added and stirred for 30 min.…”

Section: Methodsmentioning

confidence: 99%

Construction of multifunctional hydrogel based on the tannic acid-metal coating decorated MoS2 dual nanozyme for bacteria-infected wound healing

Duan

et al. 2022

Bioactive Materials

157

110

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Bacterial infection, tissue hypoxia and inflammatory response can hinder the infected wound repair process. To mitigate the above issues, tannic acid-chelated Fe-decorated molybdenum disulfide nanosheets (MoS 2 @TA/Fe NSs) with dual enzyme activities were developed and anchored to a multifunctional hydrogel. The hydrogel exhibited excellent antibacterial ability owing to the combined effects of photothermal therapy (PTT), glutathione (GSH) loss, and the peroxidase (POD)-like activity (catalyse H 2 O 2 into ·OH under acid condition) of MoS 2 @TA/Fe NSs. Benefitting from the catalase (CAT)-like activity, the hydrogel could decompose H 2 O 2 into O 2 at neutral pH to relieve hypoxia and supply adequate O 2 . POD-like activity was mainly attributed to MoS 2 NSs, while CAT-like activity was primarily due to TA/Fe complex. Moreover, MoS 2 @TA/Fe NSs endowed the hydrogel with outstanding anti-oxidant ability to scavenge redundant reactive oxygen species (ROS) and reactive nitrogen species (RNS) under neutral environment to maintain the balance of antioxidant systems and prevent inflammation. In addition, the hydrogel could inhibit the release of inflammatory factors for the anti-inflammatory property of TA. TA retained partial phenolic hydroxyl groups, which cross-linked the nanosheets to the network structure of the hydrogel and promoted the adhesion of hydrogels. Due to the dynamic boron ester bonds between polyvinyl alcohol (PVA), dextran (Dex), MoS 2 @TA/Fe, and borax, the hydrogel demonstrated fast self-healing and rapid shape adaptability. This shape-adaptable adhesive hydrogel could fill the whole wound and closely contact the wound, ensuring that it achieved its functions with maximum efficiency. The MoS 2 @TA/Fe nanozyme-anchored multifunctional hydrogel showed high potential for bacteria-infected wound healing.

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“…While the P atoms enhance the electron-donating ability of X 2 2-, which encourages the redox https://doi.org/10.1007/s40820-021-00785-2 © The authors reactions of metal atoms [68]. Recently, numerous reports are available in the literature for TM-based phosphosulfides such as MoPS, PdPS, CoPS, FePS 3 , NiPS 3 , and so on [26,66,[139][140][141][142][143][144][145][146][147].…”

Section: Phosphosulfidesmentioning

confidence: 99%

Shining Light on Anion-Mixed Nanocatalysts for Efficient Water Electrolysis: Fundamentals, Progress, and Perspectives

et al. 2022

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Highlights This review introduces recent advances of various anion-mixed transition metal compounds (e.g., nitrides, halides, phosphides, chalcogenides, (oxy)hydroxides, and borides) for efficient water electrolysis applications in detail. The challenges and future perspectives are proposed and analyzed for the anion-mixed water dissociation catalysts, including polyanion-mixed and metal-free catalyst, progressive synthesis strategies, advanced in situ characterizations, and atomic level structure–activity relationship. Abstract Hydrogen with high energy density and zero carbon emission is widely acknowledged as the most promising candidate toward world's carbon neutrality and future sustainable eco-society. Water-splitting is a constructive technology for unpolluted and high-purity H2 production, and a series of non-precious electrocatalysts have been developed over the past decade. To further improve the catalytic activities, metal doping is always adopted to modulate the 3d-electronic configuration and electron-donating/accepting (e-DA) properties, while for anion doping, the electronegativity variations among different non-metal elements would also bring some potential in the modulations of e-DA and metal valence for tuning the performances. In this review, we summarize the recent developments of the many different anion-mixed transition metal compounds (e.g., nitrides, halides, phosphides, chalcogenides, oxyhydroxides, and borides/borates) for efficient water electrolysis applications. First, we have introduced the general information of water-splitting and the description of anion-mixed electrocatalysts and highlighted their complementary functions of mixed anions. Furthermore, some latest advances of anion-mixed compounds are also categorized for hydrogen and oxygen evolution electrocatalysis. The rationales behind their enhanced electrochemical performances are discussed. Last but not least, the challenges and future perspectives are briefly proposed for the anion-mixed water dissociation catalysts.

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Modulating interfacial charge distribution of single atoms confined in molybdenum phosphosulfide heterostructures for high efficiency hydrogen evolution

Cited by 50 publications

References 63 publications

Synergistic Regulation of S-Vacancy of MoS2-Based Materials for Highly Efficient Electrocatalytic Hydrogen Evolution

Synergistic Regulation of S-Vacancy of MoS2-Based Materials for Highly Efficient Electrocatalytic Hydrogen Evolution

Construction of multifunctional hydrogel based on the tannic acid-metal coating decorated MoS2 dual nanozyme for bacteria-infected wound healing

Shining Light on Anion-Mixed Nanocatalysts for Efficient Water Electrolysis: Fundamentals, Progress, and Perspectives

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