MXenes: Novel electrocatalysts for hydrogen production and nitrogen reduction

Leong, Chon Chio; Qu, Yuanju; Kawazoe, Yoshiyuki; Ho, Samuel K. M.; Pan, Hui

doi:10.1016/j.cattod.2020.10.003

Cited by 30 publications

(15 citation statements)

References 105 publications

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“…In recent years, tremendous research efforts have been dedicated to search high-performance electrocatalysts for NRR. − Many electrocatalysts based on metals, metallic oxides, metal phosphides, metal sulfides, carbon materials, carbon nitrides, and metal–organic frameworks have been shown to enable NRR at room temperature and atmospheric pressure. ,− Among them, precious metals such as Au, Pd, and their bimetallic materials exhibited excellent electrocatalytic NRR performance. For example, Yan and colleagues have demonstrated that NH 3 can be produced (NH 3 yield: 1.648 μg cm –2 h –1 ) through the electrocatalytic NRR using tetrahexahedral Au nanorods as electrocatalysts .…”

Section: Introductionmentioning

confidence: 99%

Efficient Electrocatalytic Nitrogen Reduction to Ammonia on Ultrafine Sn Nanoparticles

Xue

Sun

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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Electrocatalytic nitrogen reduction reaction (NRR) at ambient conditions is a promising route for ammonia (NH3) synthesis but still suffers from low activity and selectivity. Here, ultrafine Sn nanoparticles (NPs) grown on carbon blacks (SnSC/C) have been synthesized through a wet-chemical method using sodium citrate dehydrate as a stabilizing agent. Benefiting from the small sizes of Sn NPs, the SnSC/C catalyst exhibits excellent electrocatalytic performance for NRR with a high Faradaic efficiency of 22.76% and an NH3 yield rate of 17.28 μg h–1 mg–1 in the 0.1 M Na2SO4 electrolyte, outperforming many reported electrocatalysts for NRR under similar conditions. Density functional theory calculation results reveal that the potential-determining step on Sn NPs is the generation of NHNH* through simultaneous hydrogenation of N2 * by a H* and a H+/e– pair via Langmuir–Hinshelwood plus Eley–Rideal mechanisms.

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Section: Introductionmentioning

confidence: 99%

Efficient Electrocatalytic Nitrogen Reduction to Ammonia on Ultrafine Sn Nanoparticles

Xue

Sun

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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“…28) can improve the catalytic reduction of MXenes efficiently. MXenes have also shown a great performance in the nitrogen reduction reaction (NRR) 29,30 and NO 3 À reduction to harmless N 2 . 31 With excellent catalytic performance in the NRR, MXenes may also have great catalytic performance in the NRA reaction.…”

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confidence: 99%

Functionalized MXenes for efficient electrocatalytic nitrate reduction to ammonia

Wang

Guo

et al. 2022

J. Mater. Chem. A

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“…Some of the properties which determine MXenes as promising candidate as electrocatalyst are: (a) the 2D atomically thin layer that provides high specific surface area and rich edges for the catalytic activity; (b) the facets of the 2D monolayers are unlikely to be altered but several methods like functionalization, defect engineering, edge control, and doping have been assigned to improve the catalytic performance; (c) the compositional, structural, and interface engineering of MXenes for optimal catalytic activity; and (d) exfoliating bulk to 2D monolayers that is acquired from the layered counterparts with interlayerinteraction much influenced by van der Waals forces that possibly avoid aggregation. 77 Different strategies could be followed for implementation of metals atoms into the MXenes. After implementing transition metal atoms like Ti 2 CO 2 -W, Zr 2 CO 2 -(Mo, Re), Hf 2 CO 2 -Os and Ta 2 CO 2 -(Pd, Ru, Ir, Au, Cu etc.,) have tuned HER activity and also satisfied the requirements of suitable Gibbs free energy range and metallic electron conductivity.…”

Section: Electron Transfer Propertiesmentioning

confidence: 99%

Recent advances in MXene as electrocatalysts for sustainable energy generation: A review on surface engineering and compositing of MXene

Das

Balaji

Dutta

et al. 2022

Intl J of Energy Research

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The electrocatalysis have a crucial role in the journey towards sustainable energy-economy. By observing present scenario, it can be inferred that the electrochemical energy technologies have become an inseparable system in our everyday-life. From generating green fuels to fabrication of high rechargeable electrochemical systems, are being achieved with the help of electrocatalyst. But, the shortage of pertinent catalysts has hindered this process. The desirable factors mainly required in a suitable electrocatalyst are its economic feasibility, robustness, reusability, and performance efficiency. To achieve that, scientists from all over the globe recommended various options, where tuning the MXenes are one of them. Characteristics like hydrophilicity, superior conductivity, and facile processing techniques have made them prominent choice for the applications. Further, enhancements like forming hybrids, different procedures of synthesis of its sheets are done to alter the electronic and structural features to achieve better catalytic activity. In this article, we are going to illustrate some of the important synthesis strategies, applications along with their pros and cons. This article promotes recent advancements in the surface engineering of MXene and its composites such as electrocatalyst in hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR); meanwhile invites researchers from different fields of science applications to contribute in this research to expand its extent.

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MXenes: Novel electrocatalysts for hydrogen production and nitrogen reduction

Cited by 30 publications

References 105 publications

Efficient Electrocatalytic Nitrogen Reduction to Ammonia on Ultrafine Sn Nanoparticles

Efficient Electrocatalytic Nitrogen Reduction to Ammonia on Ultrafine Sn Nanoparticles

Functionalized MXenes for efficient electrocatalytic nitrate reduction to ammonia

Recent advances in MXene as electrocatalysts for sustainable energy generation: A review on surface engineering and compositing of MXene

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