The formation of a hybrid structure from tungsten selenide and oxide plates for a hydrogen-evolution electrocatalyst

Fominski, V. Yu.; Grigoriev, S. N.; Романов, Р. И.; Волосова, М. А.; Грунин, А. И.; Teterina, G. D.

doi:10.1134/s1063785016060055

Cited by 24 publications

(5 citation statements)

References 12 publications

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“…Amorphous transition metal chalcogenides (a-TMCs) attracted particular attention for electrocatalytic applications in recent years, with emphasis placed on amorphous molybdenum sulfide (a-MoS x ) as hydrogen evolution catalyst as it showed a catalytic activity for the reaction higher than that of its crystalline counterpart . Despite the increasing interest in a-MoS x , reports on the other a-TMCs, i.e., a-MoSe x , a-WSe x , and a-WS x , are far more limited: the electrical and catalytic characteristics of these three compounds are usually inferred by analogy with amorphous molybdenum sulfide, due to the similar metal/chalcogen molar ratio and the similar Raman fingerprint that suggests the same coordination structure between metal and chalcogen. − Amorphous molybdenum sulfides, discussed here as a representative of the whole a-TMC family, can be considered a class of a-MoS x compounds with different sulfur stoichiometry, with x ranging from 2 , to 6 according to the synthesis route, that lacks a long-range order but exhibits a short-range organization depending on the Mo/S atomic ratio. Different models have been proposed to resolve the structure of amorphous molybdenum sulfides; e.g., for a-MoS 4.7 , a linear model has been proposed based on Mo 3 S 14 building blocks, connected through bridging (S–S) bonds .…”

Section: Structure Of Group VI Transition Metal Chalcogenidesmentioning

confidence: 99%

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO₂ and N₂ Electroreduction

et al. 2021

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Group VI transition metal chalcogenides are the subject of increasing research interest for various electrochemical applications such as low-temperature water electrolysis, batteries, and supercapacitors due to their high activity, chemical stability, and the strong correlation between structure and electrochemical properties. Particularly appealing is their utilization as electrocatalysts for the synthesis of energy vectors and value-added chemicals such as C-based chemicals from the CO2 reduction reaction (CO2R) or ammonia from the nitrogen fixation reaction (NRR). This review discusses the role of structural and electronic properties of transition metal chalcogenides in enhancing selectivity and activity toward these two key reduction reactions. First, we discuss the morphological and electronic structure of these compounds, outlining design strategies to control and fine-tune them. Then, we discuss the role of the active sites and the strategies developed to enhance the activity of transition metal chalcogenide-based catalysts in the framework of CO2R and NRR against the parasitic hydrogen evolution reaction (HER); leveraging on the design rules applied for HER applications, we discuss their future perspective for the applications in CO2R and NRR. For these two reactions, we comprehensively review recent progress in unveiling reaction mechanisms at different sites and the most effective strategies for fabricating catalysts that, by exploiting the structural and electronic peculiarities of transition metal chalcogenides, can outperform many metallic compounds. Transition metal chalcogenides outperform state-of-the-art catalysts for CO2 to CO reduction in ionic liquids due to the favorable CO2 adsorption on the metal edge sites, whereas the basal sites, due to their conformation, represent an appealing design space for reduction of CO2 to complex carbon products. For the NRR instead, the resemblance of transition metal chalcogenides to the active centers of nitrogenase enzymes represents a powerful nature-mimicking approach for the design of catalysts with enhanced performance, although strategies to hinder the HER must be integrated in the catalytic architecture.

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Section: Structure Of Group VI Transition Metal Chalcogenidesmentioning

confidence: 99%

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO₂ and N₂ Electroreduction

et al. 2021

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“…Obviously, the requirement for the method of producing catalysts of this type increases when hybrid catalysts should be formed. The formation of hybrid nanostructures containing chalcogenides and oxides of transition metal should be considered as a perspective direction for obtaining new (photo)cathodes for enhanced (photo-assistant) electrochemical HER [9,16,27,28,29].…”

Section: Introductionmentioning

confidence: 99%

Pulsed Laser Deposition of Nanostructured MoS3/np-Mo//WO3−y Hybrid Catalyst for Enhanced (Photo) Electrochemical Hydrogen Evolution

et al. 2019

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Pulsed laser ablation of MoS2 and WO3 targets at appropriate pressures of background gas (Ar, air) were used for the preparation of new hybrid nanostructured catalytic films for hydrogen production in an acid solution. The films consisted of a nanostructured WO3−y underlayer that was covered with composite MoS3/np-Mo nanocatalyst. The use of dry air with pressures of 40 and 80 Pa allowed the formation of porous WO3−y films with cauliflower- and web-like morphology, respectively. The ablation of the MoS2 target in Ar gas at a pressure of 16 Pa resulted in the formation of amorphous MoS3 films and spherical Mo nanoparticles. The hybrid MoS3/np-Mo//WO3−y films deposited on transparent conducting substrates possessed the enhanced (photo)electrocatalytic performance in comparison with that of any pristine one (MoS3/np-Mo or WO3−y films) with the same loading. Modeling by the kinetic Monte Carlo method indicated that the change in morphology of the deposited WO3−y films could be caused by the transition of ballistic deposition to diffusion limited aggregation of structural units (atoms/clusters) under background gas pressure growth. The factors and mechanisms contributing to the enhancement of the electrocatalytic activity of hybrid nanostructured films and facilitating the effective photo-activation of hydrogen evolution in these films are considered.

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“…Moreover, a unique string‐like structure of NiWO 4 ‐WO 3 ‐WO 2.9 composite was developed, in which WO 2.9 plays a critical role in the electrocatalytic activity for HER [123] . Likewise, the ultrathin WSe 2 /WO 3‐y nanoplates synthesized by Fominski, [124] outperform the catalytic activity of the single component. In another work, WS 2 /WO 3 heterostructure is constructed by a facile sulfurization process, and the surface WS 2 is found to greatly enhance the intrinsic conductivity and hydrogenation activity [125] .…”

Section: Design Principles For Tungsten Oxidementioning

confidence: 99%

Design Principles for Tungsten Oxide Electrocatalysts for Water Splitting

et al. 2021

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Electrocatalytic water splitting involving the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a crucial and effective pathway to obtain clean and renewable energy resources. The advanced electrocatalysts can significantly reduce the reaction energy barrier to realize high‐efficiency energy conversion. In this regard, noble‐metal catalysts display excellent catalytic performance for the water splitting reaction, but the high cost hinders its large‐scale application. As a low‐cost candidate for noble‐metal catalysts, tungsten oxide is endowed with the variable crystalline phase and adjustable composition, which provide more opportunities to achieve satisfactory catalytic activity by engineering crystal structure and modulating surface electronic states. To promote the reaction activity and stability, some effective strategies have been developed to optimize the surface crystal and electronic structure of tungsten oxide electrocatalysts for overall water splitting. In this review, we especially highlight the latest advances and progress in the exploration of tungsten oxide electrocatalysts for HER and OER, and systematically classify these strategies into several design principles involving adjustable surface morphology, engineering defects, and synergistic catalysis, providing a deep understanding of the relationship between the catalytic activity and crystal structure in the tungsten oxide. Some perspectives are also proposed to guide a rational design of tungsten oxide electrocatalyst for water splitting.

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The formation of a hybrid structure from tungsten selenide and oxide plates for a hydrogen-evolution electrocatalyst

Cited by 24 publications

References 12 publications

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO₂ and N₂ Electroreduction

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO₂ and N₂ Electroreduction

Pulsed Laser Deposition of Nanostructured MoS3/np-Mo//WO3−y Hybrid Catalyst for Enhanced (Photo) Electrochemical Hydrogen Evolution

Design Principles for Tungsten Oxide Electrocatalysts for Water Splitting

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The formation of a hybrid structure from tungsten selenide and oxide plates for a hydrogen-evolution electrocatalyst

Cited by 24 publications

References 12 publications

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO2 and N2 Electroreduction

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO2 and N2 Electroreduction

Pulsed Laser Deposition of Nanostructured MoS3/np-Mo//WO3−y Hybrid Catalyst for Enhanced (Photo) Electrochemical Hydrogen Evolution

Design Principles for Tungsten Oxide Electrocatalysts for Water Splitting

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Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO₂ and N₂ Electroreduction

Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO₂ and N₂ Electroreduction