2D heterogeneous vanadium compound interfacial modulation enhanced synergistic catalytic hydrogen evolution for full pH range seawater splitting

Wang, Zhenguo; Xu, Wangqiong; Yu, Ke; Yu, Feng; Zhu, Z. Q.

doi:10.1039/d0nr00207k

Cited by 66 publications

(31 citation statements)

References 42 publications

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“…With a small charge transfer resistance of 1.28 Ω, MoS2/Ti3C2Tx@C required a small overpotential (ηj=10) of 135 mV at a current density of -10 mA cm -2 in 0.5 M H2SO4, 217 mV smaller than the MoS2/rGO@C hybrid when rGO is used as the substrate (curves 1 and 2, Figure 6b, see Vocabulary for a definition of overpotential and Tafel slope). 70 The nanohybrids were also durable in acid for 20 h of operation at -130 mV (vs. NiSe2, 175 and VS2 176 to various MXenes have also achieved synergistically enhanced HER activity.…”

Section: Mxene Hybrids and Composites For Electrocatalytic (Ec) Hermentioning

confidence: 92%

Rational Design of Two-Dimensional Transition Metal Carbide/Nitride (MXene) Hybrids and Nanocomposites for Catalytic Energy Storage and Conversion

et al. 2020

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Electro-, photo-, and photoelectrocatalysis play a critical role toward the realization of a sustainable energy economy. They facilitate numerous redox reactions in energy storage and conversion systems, enabling the production of chemical feedstock and clean fuels from abundant resources like water, carbon dioxide, and nitrogen. One major obstacle for their large-scale implementation is the scarcity of cost-effective, durable, and efficient catalysts. A family of twodimensional transition metal carbides, nitrides, and carbonitrides (MXenes) has recently emerged as promising earth-abundant candidates for large-area catalytic energy storage and conversion due to their unique properties of hydrophilicity, high metallic conductivity, and ease of production by solution processing. To take full advantage of these desirable properties, MXenes have been combined with other materials to form MXene hybrids with significantly enhanced catalytic performances beyond the sum of their individual components. MXene hybridization tunes the electronic structure towards optimal binding of redox active species to improve intrinsic activity, while increasing the density and accessibility of active sites. This review outlines recent strategies in the design of MXene hybrids for industrially relevant electrocatalytic, photocatalytic, and photoelectrocatalytic applications such as water splitting, metal-air/sulfur batteries, carbon dioxide reduction, and nitrogen reduction. By clarifying the roles of individual material components in the MXene hybrids, we provide design strategies to synergistically couple MXenes with associated materials for highly efficient and durable catalytic applications. We conclude by highlighting key gaps in the current understanding of MXene hybrids to guide future MXene hybrid designs in catalytic energy storage and conversion applications.

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Section: Mxene Hybrids and Composites For Electrocatalytic (Ec) Hermentioning

confidence: 92%

Rational Design of Two-Dimensional Transition Metal Carbide/Nitride (MXene) Hybrids and Nanocomposites for Catalytic Energy Storage and Conversion

et al. 2020

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“…4b ). 68 The 103 mV dec −1 , 92 mV dec −1 , and 75 mV dec −1 are the Tafel slope values for M1, M3 and M4, respectively.…”

Section: Resultsmentioning

confidence: 99%

MWCNT-modified MXene as cost-effective efficient bifunctional catalyst for overall water splitting

Zahra

Rizwan

2022

RSC Adv.

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“…Generally, the Tafel plots in Figure 4(c) are used to evaluate the HER catalytic kinetics and determine the corresponding HER catalytic mechanism. According to the different Tafel slopes, the HER mechanisms can be summarized for the Volmer‐Heyrovsky‐Tafel reactions: (1) when Tafel slope is higher than 120 mV ⋅ dec −1 , the Volmer reaction is rate‐determining step (

{normalH}_{2} normalO + {normale}^{-} = H_{abs} + {OH}^{-}

); (2) when the slope is between 40 and 115 mV ⋅ dec −1 , the Heyrovsky reaction is rate‐determining step (

{normalH}_{2} normalO + e^{-} + H_{abs} = H_{2} + {OH}^{-}

); when the slope is less than 35 mV ⋅ dec −1 , the Tafel reaction is rate‐determining step (

{2 H}_{abs} + 2 e^{-} = H_{2}

) [53–54] . This measurement‘s Tafel slope of Pt/C material is 33 mV ⋅ dec −1 , consistent with the theoretical value [55] .…”

Section: Resultsmentioning

confidence: 99%

Heterostructured Mo‐Doped CoP on MXene Supports Enhanced the Alkaline Hydrogen Evolution Activity

et al. 2022

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The development of safe, efficient, and non-noble-metal electrocatalysts is a promising approach for hydrogen energy production. However, due to low electrical conductivity and weak stability, non-noble metal catalysts for HER are significantly limited in practice. Here, a method for low-cost catalysts was reported for synthesizing Mo-CoP/Ti 3 C 2 T x composites in which Mo-doped CoP materials were facilely grown on the surface of Ti 3 C 2 T x MXene. The introduction of MXene and the doping of Mo promoted electron transfer and increased the active sites compared with CoP. As HER electrocatalysts, the Mo-CoP/Ti 3 C 2 T x materials exhibited a good HER activity with a low overpotential of only 117 mV. What's more, these catalysts had shown excellent electron conductivity, fast catalytic dynamics, and a boosted electrochemical active surface. Suitable synthetic ratios were obtained by optimizing the MXene substrate and the Mo doping amount. This work provided a new guide for the design and exploration of MXene based electrocatalysts.

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2D heterogeneous vanadium compound interfacial modulation enhanced synergistic catalytic hydrogen evolution for full pH range seawater splitting

Abstract: A composite material (VS2@V2C) of vertically mosaic VS2 nanosheets was grown on a V2C substrate for electrolyzing water in the full pH range for hydrogen evolution.

Cited by 66 publications

References 42 publications

Rational Design of Two-Dimensional Transition Metal Carbide/Nitride (MXene) Hybrids and Nanocomposites for Catalytic Energy Storage and Conversion

Rational Design of Two-Dimensional Transition Metal Carbide/Nitride (MXene) Hybrids and Nanocomposites for Catalytic Energy Storage and Conversion

MWCNT-modified MXene as cost-effective efficient bifunctional catalyst for overall water splitting

Heterostructured Mo‐Doped CoP on MXene Supports Enhanced the Alkaline Hydrogen Evolution Activity

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