Plasmonic Enhancement in Water Splitting Performance for NiFe Layered Double Hydroxide‐N<sub>10</sub>TC MXene Heterojunction

Wang, Jin; Wei, Xiaojie; Song, Wenwu; Shi, Xu; Wang, Xunyue; Zhong, Weiying; Wang, Minmin; Ju, Jianfeng; Tang, Yanfeng

doi:10.1002/cssc.202100043

Cited by 19 publications

(18 citation statements)

References 45 publications

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“…Therefore, the active sites (*) of Sn–Ni(OH) 2 could be the Ni sites away from (approximate to the chemical environment of the Ni site in Ni(OH) 2 , marked as T Ni–NiNi ) or near to the Sn site (marked as T Ni–NiSn ) or even the doped Sn site itself (labeled as T Sn–NiSn ). In addition, considering that Sn–Ni(OH) 2 mainly goes through the four steps of * → *OH → *O → *OOH → O 2 during the OER course, the corresponding changed standard Gibbs free energies (Δ G ) can be marked as Δ G (1) , Δ G (2) , Δ G (3) , and Δ G (4) . Hence, when the active site is T Ni–NiSn (Figure a), Sn–Ni(OH) 2 follows the procedures below.…”

Section: Resultsmentioning

confidence: 99%

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)₂

Jian

Kou

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Ni(OH)2-based materials are widely studied in oxygen evolution reaction (OER), but no related synthesis, electrocatalytic application, or theoretical analysis of Sn4+-doped Ni(OH)2 has been reported. In this work, Sn–Ni(OH)2 with a homogeneously distributed nanosheet array was synthesized through a one-step hydrothermal process. It displays a hugely enhanced catalytic activity compared to undoped Ni(OH)2 throughout the OER and hydrogen evolution reaction (HER) processes. The overpotentials at 100 mA cm–2 of Sn–Ni(OH)2 are 312 mV (OER) and 298 mV (HER), which are lower than the corresponding 396 and 427 mV of Ni(OH)2, respectively. In addition, Sn–Ni(OH)2 can deliver stable large current densities (at ≈500 and ≈1000 mA cm–2) for the long-term (>100 h) chronoamperometry testing. Moreover, Sn–Ni(OH)2 illustrates catalytic activity comparable to that of a commercial Pt/C||RuO2 electrode pair during the overall water splitting course. Both experimental phenomena and relevant computed theoretical data confirm that the enhanced water splitting activity is mainly due to the introduced Sn4+ site, which acts as the active center activates the nearby Ni sites during the OER, while acting as the most active reaction site that participates in the HER. Although the doped Sn4+ has two different effects on OER and HER proceedings, water splitting performance of Sn–Ni(OH)2 has been conspicuously improved.

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Section: Resultsmentioning

confidence: 99%

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)₂

Jian

Kou

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…Nevertheless, limited by its intrinsic properties (including limited active site and electrical conductivity), [ 24–27 ] the HER performance of MoS 2 is poor. Many efforts (including plasma modification, [ 28–29 ] materials compositing, [ 30–31 ] and metal doping [ 32–33 ] ) have been paid on modifying MoS 2 to increase its HER performance, among which Co doping is one of the most effective method. Recently, Liu et al.…”

Section: Introductionmentioning

confidence: 99%

CoMo₂S₄ with Superior Conductivity for Electrocatalytic Hydrogen Evolution: Elucidating the Key Role of Co

Cheng

Liu

Diao

et al. 2021

Adv Funct Materials

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CoMo2S4 2D nanosheets are constructed by a hard template‐limited domain strategy, meanwhile the hydrogen evolution reaction (HER) properties and the function of Co in CoMo2S4 are systematically investigated. Electrochemical tests show that CoMo2S4 possesses high HER performance with an overpotential of 55 and 150 mV at 10 and 100 mA cm−2, respectively, outperforming Pt/C (20%) and the state of art Mo–S, Co–S, and Co–Mo–S‐based materials. An in‐depth mechanism study reveals that the main active site of CoMo2S4 is Mo rather than Co, whereas Co plays a key role in improving the electrical conductivity of the catalyst and thus improving the HER performance. X‐ray photoelectron spectroscopy and density of state tests demonstrate that the introduction of Co leads to electron delocalization in the catalyst, making the electrons transport easier and finally endowing the catalyst with better conductive performance. It is believed this is the first time that the effect of Co on improving the bulk conductivity of Co–Mo–S catalyst is proposed, which highlights the potency of Co in improving the electrocatalytic HER activity of Mo–S‐based materials.

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“…In recent years, as an emerging 2D material, MXenes (transition‐metal carbides and/or nitrides) have attracted more and more attention in the field of electrocatalysis due to their excellent conductivity, interesting surface physical and chemical properties. [ 17–21 ] The specific surface area and the exposed activity sites of MXenes can be increased after exfoliation. However, the electrochemical activities of intrinsic MXenes are very poor, [ 22,23 ] and the typical preparation process is very cumbersome and difficult.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Construction of Ordered Sulfur‐Terminated Tantalum Carbide MXene for Efficient Overall Water Splitting

Pang

Zhao

et al. 2021

Small Structures

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Hydrogen production from electrolyzed water plays an important role in clean energy system, but the current reported non‐noble metal catalysts still need to be paired with commercial Pt/C or RuO2 for overall water splitting. It is still a great challenge to develop high activity and stability bifunctional catalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in the same medium. To date, the emerging 2D MXenes have been extensively studied in the field of electrocatalysis because of their interesting surface physicochemical characteristics. However, the preparation process is very complex and difficult. Their intrinsic electrocatalytic properties are not good enough due to the disordered terminal groups (‐OH/‐F/‐Cl). Herein, the traditional preparation procedure is optimized, and the 2D layered compound Ta2CS2 is directly synthesized by a one‐step method. Unlike the typical MXenes with disorderly terminated groups, Ta2CS2 is terminated orderly with S atoms, and it shows excellent conductivity and electrochemical properties. Based on the great performance for OER and HER, the exfoliated Ta2CS2 (Ta2CS2‐E) is found to be an outstanding bifunctional catalyst of MXenes‐based materials for overall water splitting.

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Plasmonic Enhancement in Water Splitting Performance for NiFe Layered Double Hydroxide‐N₁₀TC MXene Heterojunction

Cited by 19 publications

References 45 publications

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)₂

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)₂

CoMo₂S₄ with Superior Conductivity for Electrocatalytic Hydrogen Evolution: Elucidating the Key Role of Co

One‐Step Construction of Ordered Sulfur‐Terminated Tantalum Carbide MXene for Efficient Overall Water Splitting

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Plasmonic Enhancement in Water Splitting Performance for NiFe Layered Double Hydroxide‐N10TC MXene Heterojunction

Cited by 19 publications

References 45 publications

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)2

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)2

CoMo2S4 with Superior Conductivity for Electrocatalytic Hydrogen Evolution: Elucidating the Key Role of Co

One‐Step Construction of Ordered Sulfur‐Terminated Tantalum Carbide MXene for Efficient Overall Water Splitting

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Plasmonic Enhancement in Water Splitting Performance for NiFe Layered Double Hydroxide‐N₁₀TC MXene Heterojunction

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)₂

Fascinating Tin Effects on the Enhanced and Large-Current-Density Water Splitting Performance of Sn–Ni(OH)₂

CoMo₂S₄ with Superior Conductivity for Electrocatalytic Hydrogen Evolution: Elucidating the Key Role of Co