Ultrathin molybdenum phosphide films as high-efficiency electrocatalysts for hydrogen evolution reaction

Hu, Tingsong; Tai, Guòan; Wu, Zenghui; Wang, Rui; Hou, Chuang; Sheng, Lihang

doi:10.1088/2053-1591/aae6c0

Cited by 8 publications

(9 citation statements)

References 43 publications

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“…As a d-block element with multiple oxidation states, molybdenum and molybdenum-based inorganic materials covering oxides, carbides, nitrides, phosphides, , selenides, and sulfides − have drawn significant attention, and part of them are considered as promising candidates for hydrogen evolution reaction (HER) without precious metal catalysts due to advantages including low cost and facile synthesis. − On the other hand, metal borides are a kind of inorganic materials considered as potential electrocatalysts for the HER as well because of their high activity and stability. − The combination of these two materials has led to continuous interest in the evaluation of the HER performance of molybdenum boride materials. ,, …”

Section: Introductionmentioning

confidence: 99%

α-MoB₂ Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

Liu

Gong

2022

ACS Appl. Nano Mater.

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α-MoB2 is recognized as the most efficient molybdenum boride for electrocatalytic hydrogen evolution reaction (HER). However, the convenient synthesis of single phase α-MoB2 is still challenging, and its HER activity in alkaline electrolytes remains unclear. Herein, we report the first successful synthesis of the α-MoB2 nanosheets by a simple and facile molten salt method through the MoCl5 and NaBH4 reaction at 850 °C. The α-MoB2 nanosheets exhibit a remarkable HER performance in alkaline electrolytes, delivering a low overpotential of 124 mV at a current density of 10 mA/cm2. In acidic electrolytes, an improved performance was found in comparison to that of the bulk and nano α-MoB2 with an overpotential as low as 141 mV at 10 mA/cm2. Such HER performance arises from the nanosheet structure that allows more active planes to be exposed. In addition, the α-MoB2 nanosheets possess an outstanding stability in both acidic and alkaline media, showing negligible current density drop even after 3000 cycles and more than 24 h of potentiostatic operation.

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Section: Introductionmentioning

confidence: 99%

α-MoB₂ Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

Liu

Gong

2022

ACS Appl. Nano Mater.

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“…As a result, various 2D layered or nonlayered materials can be prepared by topochemically converting the nanosheets obtained by the abovementioned methods [ 23,47 ] or with the assistance of a template, [ 48 ] epitaxy, [ 49 ] or confinement. [ 21 ] As illustrated in Figure 3O, 2D Mo 5 N 6 crystals can be synthesized via in situ chemical conversion of layered MoS 2 crystals. [ 23 ] Highly crystalline Mo 5 N 6 with a thickness of 3.5 nm was obtained from MoS 2 with a thickness ratio of 37% of 9.5 nm, which is in good agreement with the prediction (Figure 3P–S).…”

Section: Synthetic Methods For Preparing 2d Mo Compoundsmentioning

confidence: 99%

“…Hu et al. [ 21 ] reported the controllable synthesis of a 2D MoP film with a thickness of 4.87 nm by topochemical phosphorization of the surface of Mo foil.…”

Section: Synthetic Methods For Preparing 2d Mo Compoundsmentioning

confidence: 99%

Section: Categories Of 2d Mo Compoundsmentioning

confidence: 99%

“…Furthermore, 2D Mo nitrides [48,50] and phosphides [51] can be obtained through topochemical conversion under different atmospheres. Hu et al [21] reported the controllable synthesis of a 2D MoP film with a thickness of 4.87 nm by topochemical phosphorization of the surface of Mo foil.…”

Section: Topochemical Transformationmentioning

confidence: 99%

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2D Molybdenum Compounds for Electrocatalytic Energy Conversion

Chen

Lin

Wang

et al. 2022

Adv Funct Materials

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The development of advanced nanomaterials is urgent for electrocatalytic energy conversion applications. Recently, 2D nanomaterial-derived heterogeneous electrocatalysts have shown great promise for both fundamental research and practical applications owing to their extremely high surfaceto-volume ratio and tunable geometric and electronic properties. Because of their unique electronic structure and physicochemical properties, molybdenum (Mo)-based 2D nanomaterials are emerging as one of the most attractive candidates among the nonprecious materials for electrocatalysts. This review provides a comprehensive overview of the recent advances in the synthesis and modulation of 2D Mo compounds for applications in electrocatalytic energy conversion. The categories based on different compositions and corresponding synthetic approaches of 2D Mo compounds are first introduced. Subsequently, various atomic/plane/synergistic engineering strategies, along with catalytic optimization in the electrochemical process that involves the cycles of water, carbon, and nitrogen, are discussed in detail. Finally, the current challenges and future opportunities for the development of 2D Mo-based electrocatalysts are proposed with the goal of shedding light on these promising 2D nanomaterials for electrocatalytic energy conversion.

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Multifunctional Catalytic Hierarchical Interfaces of Ni₁₂P₅‐Ni₂P Porous Nanosheets Enabled Both Sulfides Reaction Promotion and Li‐Dendrite Suppression for High‐Performance Li–S Full Batteries

Xu,

Guo,

Fang

et al. 2023

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The development of lithium–sulfur (Li–S) batteries is very promising and yet faces the issues of hindered polysulfides conversion and Li dendrite growth. Different from using different materials strategies to overcome these two types of problems, here multifunctional catalytic hierarchical interfaces of Ni12P5–Ni2P porous nanosheets formed by Ni2P partially in situ converted from Ni12P5 are proposed. The unique electronic structure in the interface endows Ni12P5–Ni2P effective electrocatalysis effect toward both sulfides’ reduction and oxidation through reducing Gibbs free energies, indicating a bidirectional conversion acceleration. Importantly, Ni12P5–Ni2P porous nanosheets with hierarchical interfaces also reduced the Li nucleation energy barrier, and a dendrite‐free Li deposition is realized during the overall Li deposition and stripping steps. To this end, Ni12P5‐Ni2P decorated carbon nanotube/S cathode showing a high capacity of over 1500 mAh g‒1, and a high rate capability of 8 C. Moreover, the coin full cell delivered a high capacity of 1345 mAh g‒1 at 0.2 C and the pouch full cell delivered a high capacity of 1114 mAh g‒1 at 0.2 C with high electrochemical stability during 180° bending. This work inspires the exploration of hierarchical structures of 2D materials with catalytically active interfaces to improve the electrochemistry of Li–S full battery.

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Ultrathin molybdenum phosphide films as high-efficiency electrocatalysts for hydrogen evolution reaction

Cited by 8 publications

References 43 publications

α-MoB₂ Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

α-MoB₂ Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

2D Molybdenum Compounds for Electrocatalytic Energy Conversion

Multifunctional Catalytic Hierarchical Interfaces of Ni₁₂P₅‐Ni₂P Porous Nanosheets Enabled Both Sulfides Reaction Promotion and Li‐Dendrite Suppression for High‐Performance Li–S Full Batteries

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Ultrathin molybdenum phosphide films as high-efficiency electrocatalysts for hydrogen evolution reaction

Cited by 8 publications

References 43 publications

α-MoB2 Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

α-MoB2 Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

2D Molybdenum Compounds for Electrocatalytic Energy Conversion

Multifunctional Catalytic Hierarchical Interfaces of Ni12P5‐Ni2P Porous Nanosheets Enabled Both Sulfides Reaction Promotion and Li‐Dendrite Suppression for High‐Performance Li–S Full Batteries

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α-MoB₂ Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

α-MoB₂ Nanosheets for Hydrogen Evolution in Alkaline and Acidic Media

Multifunctional Catalytic Hierarchical Interfaces of Ni₁₂P₅‐Ni₂P Porous Nanosheets Enabled Both Sulfides Reaction Promotion and Li‐Dendrite Suppression for High‐Performance Li–S Full Batteries