Carbide-directed enhancement of electrochemical hydrogen evolution reaction on tungsten carbide–oxide heterostructure

Ngo, Yen-Linh Thi; Bhamu, K.C.; Voronova, Anastasiia; Jana, Jayasmita; Kang, Sung Gu; Chung, Jin Suk; Choi, Won Mook; Jang, Jong Hyun; Hur, Seung Hyun; Seo, Bora

doi:10.1016/j.cej.2022.137915

Cited by 15 publications

(5 citation statements)

References 63 publications

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“…Constructing heterostructured nanomaterials composed of tungsten oxide and another material is an effective strategy to improve the catalytic performance of tungsten oxide [139][140][141]. The heterostructured nanomaterials reaches the catalytic performance of 1 + 1 > 2 by exposing more active sites and promoting interfacial electron transfer, which is called the "spillover" mechanism of the system [52,141].…”

Section: Heterostructure Constructionmentioning

confidence: 99%

Optimization Methods of Tungsten Oxide-Based Nanostructures as Electrocatalysts for Water Splitting

Wang

Duan

2023

Nanomaterials

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Electrocatalytic water splitting, as a sustainable, pollution-free and convenient method of hydrogen production, has attracted the attention of researchers. However, due to the high reaction barrier and slow four-electron transfer process, it is necessary to develop and design efficient electrocatalysts to promote electron transfer and improve reaction kinetics. Tungsten oxide-based nanomaterials have received extensive attention due to their great potential in energy-related and environmental catalysis. To maximize the catalytic efficiency of catalysts in practical applications, it is essential to further understand the structure–property relationship of tungsten oxide-based nanomaterials by controlling the surface/interface structure. In this review, recent methods to enhance the catalytic activities of tungsten oxide-based nanomaterials are reviewed, which are classified into four strategies: morphology regulation, phase control, defect engineering, and heterostructure construction. The structure–property relationship of tungsten oxide-based nanomaterials affected by various strategies is discussed with examples. Finally, the development prospects and challenges in tungsten oxide-based nanomaterials are discussed in the conclusion. We believe that this review provides guidance for researchers to develop more promising electrocatalysts for water splitting.

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Section: Heterostructure Constructionmentioning

confidence: 99%

Optimization Methods of Tungsten Oxide-Based Nanostructures as Electrocatalysts for Water Splitting

Wang

Duan

2023

Nanomaterials

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“…However, the sluggish kinetics of these electrode processes necessitate the use of electrocatalysts to enhance their conversion efficiencies. , Therefore, extensive efforts have been dedicated to exploring affordable, efficient, and durable catalysts for hydrogen production and its various applications. Recently, nonprecious metal-based catalysts, including carbides, , nitrides, , dichalcogenides, − phosphides, , and oxides, , are exploited for HER and HOR. However, their activities and stabilities in these reactions still fall short of satisfactory levels .…”

Section: Introductionmentioning

confidence: 99%

N-Coordinated Iridium–Molybdenum Dual-Atom Catalysts Enabling Efficient Bifunctional Hydrogen Electrocatalysis

Shi,

Li,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Achieving effective hydrogen evolution/oxidation reaction (HER/HOR) across a wide pH span is of critical importance in unlocking the full potential of hydrogen energy but remains intrinsically challenging. Here, we engineer the Ncoordinated Ir−Mo dual atoms on a carbon matrix by ultrafast high-temperature sintering, creating an efficient bifunctional electrocatalyst for both HER and HOR in both acidic and alkaline electrolytes. The optimized catalyst, Ir−Mo DAC/NC, demonstrates exceptional performance, with a significantly reduced HER overpotential of 11.3 mV at 10 mA/cm 2 and a HOR exchange current (i 0,m ) of 3972 mA/mg Ir in acidic conditions, surpassing the performance of Pt/C and Ir/C catalysts. In alkaline conditions, Ir− Mo DAC/NC also outperforms Pt/C, as evidenced by its low HER overpotential of 23 mV at 10 mA/cm 2 and a high i 0,m of 1308 mA/mg Ir . Furthermore, our catalyst exhibits remarkable stability in both acidic and alkaline environments. DFT calculations results reveal that the superior electrochemical performance of Ir−Mo DAC/NC arises from the electronic synergy between Ir and Mo pairs, which regulates the interaction between the intermediates and active sites. These findings present a promising strategy for the development of dual-atom catalysts (DACs), with potential applications in the polymer fuel cells and water electrolyzers.

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“…In recent decades, transition metal-based compounds such as carbides [ 8 , 9 , 10 , 11 ], phosphides [ 12 , 13 , 14 ], sulfides [ 15 , 16 , 17 ], oxides [ 18 , 19 , 20 ], borides [ 21 , 22 , 23 ], and nitrides [ 24 , 25 , 26 ] have been reported to be used in the HER electrocatalysts and shown good catalytic performance. Among them, molybdenum carbide (Mo x C) has attracted extensive attention because of its different Mo valence, adjustable phase composition, high abundance, high chemical stability, and d-band electronic structure, which is similar to Pt-based catalysts [ 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Construction of Ni2P-MoC/Coal-Based Carbon Fiber Self-Supporting Catalysts for Enhanced Hydrogen Evolution

Jia,

Lou,

Wang

et al. 2023

Molecules

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Efficient and inexpensive electrocatalysts play an important role in the hydrogen evolution reaction (HER) of electrolytic water splitting. Herein, Ni2P-MoC/coal-based carbon fiber (Ni2P-MoC/C-CF) self-supporting catalysts were obtained by low-temperature phosphorization and high-temperature carbonization. The Mo source and oxidized coal were uniformly dispersed in the carbon support by electrospinning technology. A precursor of Ni was introduced by the impregnation method. The synergistic effect of MoC and Ni2P may reduce the strong hydrogen adsorption capacity of pure MoC and provide a fast hydrogen release process. In addition, the C-CFs prepared by electrospinning can not only prevent the agglomeration of MoC and Ni2P particles at a high temperature but also provide a self-supporting support for the catalyst. As a result, the catalytic performance of the HER was improved greatly, and a low overpotential of 112 mV at 10 mA cm−2 was exhibited stably by the Ni2P-MoC/C-CFs. This work not only converts coal into coal-based carbon materials but also provides a feasible pathway for the rational design of large-scale molded hydrogen electrocatalysts.

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Carbide-directed enhancement of electrochemical hydrogen evolution reaction on tungsten carbide–oxide heterostructure

Cited by 15 publications

References 63 publications

Optimization Methods of Tungsten Oxide-Based Nanostructures as Electrocatalysts for Water Splitting

Optimization Methods of Tungsten Oxide-Based Nanostructures as Electrocatalysts for Water Splitting

N-Coordinated Iridium–Molybdenum Dual-Atom Catalysts Enabling Efficient Bifunctional Hydrogen Electrocatalysis

Construction of Ni2P-MoC/Coal-Based Carbon Fiber Self-Supporting Catalysts for Enhanced Hydrogen Evolution

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