MXene with controlled surface termination groups for boosting photoelectrochemical water splitting

Wu, Zihao; Zong, Hui; Fu, Baihe; Zhang, Zhonghai

doi:10.1039/d2ta06313a

Cited by 12 publications

(2 citation statements)

References 54 publications

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“…Water splitting provides a simple, effective and promising method for H 2 and O 2 production, which can effectively solve the energy crisis [234]. In general, electrolysis of water is composed of HER at the cathode and the OER at the anode and requires a theoretical voltage of 1.23 V [235].…”

Section: Overall Water Splittingmentioning

confidence: 99%

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Huang

Han

2023

Nano-Micro Lett.

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Since the discovery in 2011, MXenes have become the rising star in the field of two-dimensional materials. Benefiting from the metallic-level conductivity, large and adjustable gallery spacing, low ion diffusion barrier, rich surface chemistry, superior mechanical strength, MXenes exhibit great application prospects in energy storage and conversion, sensors, optoelectronics, electromagnetic interference shielding and biomedicine. Nevertheless, two issues seriously deteriorate the further development of MXenes. One is the high experimental risk of common preparation methods such as HF etching, and the other is the difficulty in obtaining MXenes with controllable surface groups. Recently, Lewis acidic etching, as a brand-new preparation strategy for MXenes, has attracted intensive attention due to its high safety and the ability to endow MXenes with uniform terminations. However, a comprehensive review of Lewis acidic etching method has not been reported yet. Herein, we first introduce the Lewis acidic etching from the following four aspects: etching mechanism, terminations regulation, in-situ formed metals and delamination of multi-layered MXenes. Further, the applications of MXenes and MXene-based hybrids obtained by Lewis acidic etching route in energy storage and conversion, sensors and microwave absorption are carefully summarized. Finally, some challenges and opportunities of Lewis acidic etching strategy are also presented.

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Section: Overall Water Splittingmentioning

confidence: 99%

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Huang

Han

2023

Nano-Micro Lett.

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“…Furthermore, two-dimensional transition metal carbide (MXene) materials have garnered significant attention due to their high specific surface area, excellent electron conductivity, and good mechanical strength. MXene materials have shown great potential in various fields such as photocatalysis, electrocatalysis, and photoelectrochemical application. − Among the MXene materials, 2D titanium carbide (Ti 3 C 2 ) has received particular interest because of its superior electrical conductivity, which makes it a desirable cocatalyst to enhance charge separation efficiency for boosting catalytic activity when coupled with other photocatalysts such as CdS, Zn 0.8 Cd 0.2 S, TiO 2 , and g-C 3 N 4 . − Despite the progress made in the application of Ti 3 C 2 as a photocatalyst, its utilization in piezocatalytic technology remains largely unexplored. Therefore, it is intriguing to explore the novel energy convention application of Ti 3 C 2 as a cocatalyst in the field of piezocatalysis.…”

mentioning

confidence: 99%

Construction of MXene/Bi₂WO₆ Schottky Junction for Highly Efficient Piezocatalytic Hydrogen Evolution and Unraveling Mechanism

Ning,

Hao,

Cao

et al. 2024

Nano Lett.

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For the first time, a series of MXene (Ti3C2T x )/Bi2WO6 Schottky junction piezocatalysts were constructed, and the piezocatalytic hydrogen evolution activity was explored. Optimal Ti3C2T x /Bi2WO6 exhibits the highest piezocatalytic hydrogen evolution rate of 764.4 μmol g–1 h–1, which is nearly 8 times higher than that of pure Ti3C2T x and twice as high as that of Bi2WO6. This value also surpasses that of most recently reported typical piezocatalysts. Moreover, related experimental results and density functional theory calculations reveal that Ti3C2T x /Bi2WO6 can provide unique channels for efficient electron transfer, enhance piezoelectric properties, optimize the adsorption Gibbs free energy of water, reduce activation energy for hydrogen atoms, endow robust separation capacity of charge carrier, and restrict the electron–hole recombination rate, thus significantly promoting the efficiency of hydrogen evolution reaction. Ultimately, we have unraveled an innovative piezocatalytic mechanism. This work broadens the scope of MXene materials in a sustainable energy piezocatalysis application.

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2D/0D Heterojunction Interface with Photovoltaic Enhancement and Stabilization for Label‐Free Exosome Biosensor

Wang,

Zhong,

Lee

et al. 2024

Adv Funct Materials

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The selection and design of interface materials as the key to interface engineering is crucial for the excellent performance of optoelectronic devices, enabling multi‐functional integration at interfaces. MXene has been extensively employed in optoelectronic devices as an interface material. The primary drawback in interfacial applications, however, is MXene's vulnerability to oxidation in hot, humid environments, which severely reduces photovoltaic performance. Based on hetero‐interface engineering, this work offers a novel 2D‐semiconductor/0D‐plasma heterojunction MXene‐TA‐Au‐PEG (MTAP) as a high‐performance and multifunctional photovoltaic interfacial material. MTAP not only effectively protects MXene against stacking and spontaneous oxidation, but also exhibits excellent optoelectronic properties and interfacial antifouling capability. Moreover, MTAP is employed to enhance SPR spectroscopy, allowing for the direct, real‐time detection of tumor cell exosomes with LODs as low as 0.28 particles mL−1. MTAP effectively addresses the conventional “three S” requirements for sensors in terms of sensitivity, specificity, and stability by integrating photoelectric enhancement, interfacial antifouling, and oxidative stabilization characteristics. Finally, the results of serum sample analysis showed the sensor has some potential application value in clinical diagnosis. This study offers novel perspectives on the fabrication of 2D/0D heterojunctions using semiconductor and plasma materials, with the aim of developing improved sensing chips.

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MXene with controlled surface termination groups for boosting photoelectrochemical water splitting

Abstract: Interface engineering is a promising strategy to optimize interfacial photoelectrochemical (PEC) water splitting system. However, most previous attentions are paid on engineering of semiconductor/water interface, another essential interface of electrode/current...

Cited by 12 publications

References 54 publications

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Construction of MXene/Bi₂WO₆ Schottky Junction for Highly Efficient Piezocatalytic Hydrogen Evolution and Unraveling Mechanism

2D/0D Heterojunction Interface with Photovoltaic Enhancement and Stabilization for Label‐Free Exosome Biosensor

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MXene with controlled surface termination groups for boosting photoelectrochemical water splitting

Abstract: Interface engineering is a promising strategy to optimize interfacial photoelectrochemical (PEC) water splitting system. However, most previous attentions are paid on engineering of semiconductor/water interface, another essential interface of electrode/current...

Cited by 12 publications

References 54 publications

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Construction of MXene/Bi2WO6 Schottky Junction for Highly Efficient Piezocatalytic Hydrogen Evolution and Unraveling Mechanism

2D/0D Heterojunction Interface with Photovoltaic Enhancement and Stabilization for Label‐Free Exosome Biosensor

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Construction of MXene/Bi₂WO₆ Schottky Junction for Highly Efficient Piezocatalytic Hydrogen Evolution and Unraveling Mechanism