4.8 Review

Engineering strategies and active site identification of MXene-based catalysts for electrochemical conversion reactions

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Cobalt Nanoparticles Encapsulated in N-Doped Carbon on the Surface of MXene (Ti3C2) Play a Key Role for Electroreduction of Oxygen

Haridas B. Parse et al.

Summary: MXenes have been widely used in electrochemical devices due to their unique two-dimensional structure; this study focused on the preparation and electrocatalytic ability of a composite material Co-NC/Ti3C2-800 derived from MXene and metal organic framework; the optimized composite showed enhanced oxygen reduction reaction activity and superior cycling performance, making it a potential substitute for current catalysts, especially in alkaline conditions.

ENERGY & FUELS (2021)

Article Energy & Fuels

Facile synthesis of polyaniline/titanium carbide (MXene) nanosheets/palladium nanocomposite for efficient electrocatalytic oxidation of methanol for fuel cell application

Mari Elancheziyan et al.

Summary: A highly efficient electrocatalyst composed of PANI/Pd/MXene nanocomposite was developed for methanol electrooxidation, showing improved electrochemical response and stability up to 100 cycles. This design demonstrates the potential for MXene-supported noble metal electrocatalysts to enhance methanol electrooxidation in DMFCs.
Article Chemistry, Multidisciplinary

Electrocatalytic Synthesis of Ammonia Using a 2D Ti3C2 MXene Loaded with Copper Nanoparticles

Anmin Liu et al.

Summary: In this study, a Cu/Ti3C2 composite catalyst was prepared for efficient electrochemical conversion of N2 into NH3. This catalyst exhibited high Faradaic efficiency and NH3 production rate in 0.1 M KOH solution. Moreover, it showed superior electrochemical stability and durability, with Cu playing a vital role in enhancing the catalytic activity and conductivity of Ti3C2-based materials.

CHEMPLUSCHEM (2021)

Article Chemistry, Multidisciplinary

Selective Etching Quaternary MAX Phase toward Single Atom Copper Immobilized MXene (Ti3C2Clx) for Efficient CO2 Electroreduction to Methanol

Qi Zhao et al.

Summary: An efficient method for producing single atom copper immobilized MXene for catalyzing CO2 reduction to methanol through selective etching of hybrid A layers in quaternary MAX phases was demonstrated. The single atom Cu catalyst exhibited high Faradaic efficiency and good electrocatalytic stability, attributed to its unique electronic structure and surface functional groups.

ACS NANO (2021)

Review Chemistry, Multidisciplinary

Status and Prospects of MXene-Based Lithium-Sulfur Batteries

Qian Zhao et al.

Summary: MXenes, with their metallic conductivity, strong chemical adsorption ability to polysulfides, and effective catalytic effect, show promising potential for high-performance Li-S batteries. Their use in sulfur cathode, interlayer between cathode and separator, and Li anode can enhance electrochemical performance and address challenges in Li-S battery application.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Physical

Interface Catalysis of Nickel Molybdenum (NiMo) Alloys on Two-Dimensional (2D) MXene for Enhanced Hydrogen Electrochemistry

Tong Zhang et al.

Summary: Efficient bifunctional nonprecious metallic electrocatalysts have been developed by immobilizing transition-metal-based NiMo nanoparticles on 2D Ti3C2Tx surfaces, showing superior hydrogen evolution reaction (HER) and hydrogen oxidation reaction (HOR) activities in alkaline media. The Ti3C2Tx support facilitates charge transfer and tailors the electronic structure of catalytic sites, resulting in optimized adsorption free energies for hydrogen electrochemistry.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

Article Chemistry, Inorganic & Nuclear

Facile fabrication of N-doped graphene/Ti3C2Tx (Mxene) aerogel with excellent electrocatalytic activity toward oxygen reduction reaction in fuel cells and metal-air batteries

Monireh Faraji et al.

Summary: The study successfully designed and prepared efficient, cost-effective, and durable non-platinum based electrocatalysts through the fabrication of a 3D porous N-doped graphene hybrid structure. These materials exhibited comparable catalytic activity to commercial platinum-based materials in the ORR, along with superior long-term stability.

JOURNAL OF SOLID STATE CHEMISTRY (2021)

Article Energy & Fuels

Heterostructured MoSe2/Oxygen-Terminated Ti3C2 MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Weiping Xiao et al.

Summary: The study successfully fabricated a 2D MoSe2/2D Ti3C2 MXene heterostructured architecture, leading to improved HER performance in terms of electrochemically active surface areas, oxygen-substituted surfaces, and the synergy effect between MoSe2 and MXene.

ENERGY & FUELS (2021)

Article Chemistry, Physical

Single transition metal atom catalysts on Ti2CN2 for efficient CO2 reduction reaction

Feifei Li et al.

Summary: This study investigated the catalytic activity of single transition-metal atoms anchored on 2D Ti2CN2 for CO2RR, finding that Sc, Ti, and V show high catalytic activity for CO production, while Mn and Fe are active for HCOOH production. Additional electrons injection can tune the catalytic activity and selectivity.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Two-Dimensional Carbonitride MXenes as an Efficient Electrocatalyst for Hydrogen Evolution

Bo Wei et al.

Summary: Carbonitride MXenes are highly desirable as potential electrocatalysts for the HER due to their excellent properties. This study explored the stable configurations of Mo-based carbonitride MXenes under various electrochemical environments, finding that O*/OH*-terminated Mo-based carbonitride MXenes exhibit the most stable state at ambient conditions with good catalytic activity for HER. The results provide a strategy to synthesize carbonitride MXenes with various surface functionalizations and design them through chemical doping and strain engineering.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Materials Science, Multidisciplinary

Ultrafine Pt stabilized on Ti3C2Tx/reduced graphene oxide nanocomposites for alcohol oxidation reaction (AOR)

Yunmeng Zhao et al.

Summary: Three-dimensional platinum/Ti3C2Tx-reduced graphene oxide catalyst prepared by solvothermal method exhibits superior electrocatalytic activity and stability for alcohol oxidation reaction, demonstrating its potential as an effective anode catalyst for direct alcohol fuel cells.

MATERIALS LETTERS (2021)

Article Chemistry, Physical

Mechanisms of Hydrogen Evolution Reaction in Two-Dimensional Nitride MXenes Using In Situ X-Ray Absorption Spectroelectrochemistry

Abdoulaye Djire et al.

Summary: MXenes, based on early transition-metal carbides and nitrides, exhibit highly tunable electrochemical properties suitable for various catalytic reactions. Research has shown that modifying these MXenes can enhance their catalytic activity, such as in the hydrogen evolution reaction. Mechanistic studies using in situ X-ray absorption spectroscopy indicate that the creation of oxygen vacancies on the basal planes is crucial for the catalytic activity, providing insight for future electrocatalysis and photocatalysis schemes.

ACS CATALYSIS (2021)

Article Multidisciplinary Sciences

A Mo5N6 electrocatalyst for efficient Na2S electrodeposition in room-temperature sodium-sulfur batteries

Chao Ye et al.

Summary: The Mo5N6 cathode material enables efficient Na2S electrodeposition, improving cycling performance in room-temperature sodium-sulfur batteries.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Physical

Late Transition Metal Doped MXenes Showing Superb Bifunctional Electrocatalytic Activities for Water Splitting via Distinctive Mechanistic Pathways

Rohit Anand et al.

Summary: In this study, it is demonstrated that late transition metal doping can significantly enhance the HER/OER activities of MXenes. By embedding a single Ni or Co atom into MXenes, it provides a suitable amount of electrons for optimal adsorbate evolving mechanism, resulting in activated lattice oxygen mechanism. The stability and bifunctional catalytic capability of MXene combinations towards both HER and OER are shown.

ADVANCED ENERGY MATERIALS (2021)

Article Multidisciplinary Sciences

Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction

Jiexin Chen et al.

Summary: NiFeP/MXene materials with excellent oxygen evolution reaction (OER) performance have been successfully synthesized in this study, showing promise for efficient water splitting. By tuning the electronic structure and density, the material enhances the energy level of the catalyst surface, leading to superior OER performance.

SCIENCE BULLETIN (2021)

Article Chemistry, Multidisciplinary

Lamellar MXene Composite Aerogels with Sandwiched Carbon Nanotubes Enable Stable Lithium-Sulfur Batteries with a High Sulfur Loading

Bin Zhang et al.

Summary: In this study, a lamellar aerogel composed of Ti3C2Tx MXene/carbon nanotube sandwiches was prepared to improve the cycling stability of high sulfur loading batteries. The unique parallel-aligned structure of the material effectively suppresses lithium polysulfide shuttling and enhances the confinement ability of LiPS, resulting in high capacity and superior cycling stability.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Multidisciplinary

The Electrostatic Attraction and Catalytic Effect Enabled by Ionic-Covalent Organic Nanosheets on MXene for Separator Modification of Lithium-Sulfur Batteries

Pengyue Li et al.

Summary: This study proposes a new strategy to regulate the redox kinetics and shuttle effect of polysulfides by modifying a polypropylene separator with a coating layer of guanidinium-based ionic-covalent organic nanosheets (iCON) on the surface of Ti3C2. The synergistic effects of Ti3C2 and iCON effectively suppress the shuttle effect of polysulfides and accelerate the redox reactions of sulfur species, resulting in high-performance lithium-sulfur batteries.

ADVANCED MATERIALS (2021)

Article Chemistry, Physical

Edge-oriented, high-percentage 1T′-phase MoS2 nanosheets stabilize Ti3C2 MXene for efficient electrocatalytic hydrogen evolution

Xitao Li et al.

Summary: This study successfully synthesized an efficient and stable MoS2-Ti3C2 MXene electrocatalyst using a one-step hydrothermal method, which has abundant active sites and high electrical conductivity, showing excellent electrocatalytic performance in acidic medium.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Review Chemistry, Multidisciplinary

Recent Advances on MXene-Based Electrocatalysts toward Oxygen Reduction Reaction: A Focused Review

Shaik Gouse Peera et al.

Summary: MXenes are promising catalyst supports with potential for efficient oxygen reduction reaction (ORR) processes, showing good reactivity and stability when used with both Pt and non-Pt metals. However, there are limitations and challenges that need to be addressed for further development of MXene-based ORR catalysts.

ADVANCED MATERIALS INTERFACES (2021)

Article Chemistry, Multidisciplinary

Facile Atomic-Level Tuning of Reactive Metal-Support Interactions in the Pt QDs@ HF-Free MXene Heterostructure for Accelerating pH-Universal Hydrogen Evolution Reaction

Sin-Yi Pang et al.

Summary: This study introduces a novel strategy to grow Pt quantum dots on MXene under atomic-level modulation reaction, forming efficient Pt (111) QDs 0D/1D heterostructure catalyst.

ADVANCED SCIENCE (2021)

Article Chemistry, Multidisciplinary

Single-Atom-Substituted Mo2CTx:Fe-Layered Carbide for Selective Oxygen Reduction to Hydrogen Peroxide: Tracking the Evolution of the MXene Phase

Denis A. Kuznetsov et al.

Summary: This study critically assesses the electrocatalytic activity, stability, and nature of the active phase of a two-dimensional molybdenum carbide with single-atomic iron sites in the catalysis of the oxygen reduction reaction. The research revealed that the iron single sites transformed into active iron oxyhydroxide species, challenging previous studies on the activity of native MXene phases in oxygen electrocatalysis.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Physical

Engineering the Cu/Mo2CTx (MXene) interface to drive CO2 hydrogenation to methanol

Hui Zhou et al.

Summary: In this study, an optimized Cu/Mo2CTx interface was achieved through engineering methods, leading to higher efficiency in the catalytic conversion of CO2 to methanol. Density functional theory calculations confirmed the critical role of the interface between Cu and Mo2CTx in stabilizing reaction intermediates.

NATURE CATALYSIS (2021)

Article Chemistry, Physical

Concurrent realization of dendrite-free anode and high-loading cathode via 3D printed N-Ti3C2 MXene framework toward advanced Li-S full batteries

Chaohui Wei et al.

Summary: A multifunctional 3D printed framework comprising nitrogen-doped porous Ti3C2MXene is proposed to regulate both electrodes of Li-S batteries. The framework possesses high conductivity and ample nitrogen sites for synergizing lithiophilic-sulfiphilic feature.

ENERGY STORAGE MATERIALS (2021)

Review Chemistry, Physical

Electrochemical reduction of nitrogen to ammonia: Progress, challenges and future outlook

Carmen Lee et al.

Summary: The article provides a brief overview of the current progress and challenges of the electrochemical nitrogen reduction reaction (NRR) to synthesize ammonia. Different types of electrocatalysts and their design principles are discussed, but most show unsatisfactory catalytic performance for NRR due to various factors. Future outlook includes exploring alternative external energy inputs such as cold plasma and surface plasmon resonance to improve NRR performance.

CURRENT OPINION IN ELECTROCHEMISTRY (2021)

Article Chemistry, Multidisciplinary

Intralayered Ostwald Ripening-Induced Self-Catalyzed Growth of CNTs on MXene for Robust Lithium-Sulfur Batteries

Mengyao Xu et al.

Summary: The synthesis of Ti3C2Tx-CNTs hybrids without the addition of catalyst precursors allows for the uniform precipitation of catalysts and the formation of CNTs with high integrity on the surface of Ti3C2Tx, making them ideal 3D scaffolds for accommodating sulfur and regulating the polysulfides conversion in lithium-sulfur batteries.

SMALL (2021)

Article Nanoscience & Nanotechnology

Promoting N2 electroreduction to ammonia by fluorine-terminating Ti3C2Tx MXene

Yu Ding et al.

Summary: In this study, a Ti3C2Tx MXene with a medium density of surface functionalized fluorine terminal groups was reported as an excellent catalyst for N-2 reduction reaction, showing enhanced adsorption and activation of N-2. The Ti3C2Tx MXene catalyst exhibited a high production rate of ammonia, partial current density, and Faradic efficiency, surpassing similar MXene catalysts with higher or lower densities of surface fluorine terminal groups. This work highlights the potential of developing surface functionalization toolkit to enhance the electrochemical catalytic activities of two-dimensional MXene-based materials.

NANO CONVERGENCE (2021)

Article Nanoscience & Nanotechnology

Theoretical Approach toward Optimum Anion-Doping on MXene Catalysts for Hydrogen Evolution Reaction: an Ab Initio Thermodynamics Study

Hyunjun Nam et al.

Summary: Developing highly active catalysts for hydrogen evolution reaction using earth-abundant materials is challenging. Recent studies have shown that nitrogen doping can improve the catalytic properties of titanium carbide MXene, but systematic doping engineering has not been well controlled, which hinders the reliable production of high-activity MXene catalysts. This study investigates the optimal nitrogen doping concentration and process conditions on O-functionalized Ti2C MXene for the hydrogen evolution reaction using density functional theory and thermodynamics. It was found that 8.8 at % nitrogen-doped Ti2CO2 demonstrated the best catalytic properties under standard conditions, with a deterioration in catalytic properties observed at higher doping concentrations.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Multidisciplinary

Rational Design of Highly Stable and Active MXene-Based Bifunctional ORR/OER Double-Atom Catalysts

Bo Wei et al.

Summary: Designing highly active and bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalysts with non-noble metals such as Fe/Co/Ni on MXene surfaces has shown superior performance compared to traditional unifunctional catalysts, providing a novel pathway for tunable catalytic behavior in MXenes. The electronic structure analyses revealed that the excellent catalytic activities in MXene-based DACs are attributed to the electron-capturing capability and synergistic interactions between Fe/Co/Ni adsorbents and MXene substrate. These findings not only suggest promising candidates for MXene-based bifunctional ORR/OER catalysts but also offer new theoretical insights into rationally designing noble-metal-free bifunctional DACs.

ADVANCED MATERIALS (2021)

Review Chemistry, Multidisciplinary

Comprehensive Understanding of the Thriving Ambient Electrochemical Nitrogen Reduction Reaction

Xue Zhao et al.

Summary: The electrochemical nitrogen reduction reaction, which produces ammonia, is environmentally friendly and suitable for rural economy, but faces challenges in catalysts and quantitative determination.

ADVANCED MATERIALS (2021)

Article Engineering, Environmental

Tunable nitrogen-doped delaminated 2D MXene obtained by NH3/Ar plasma treatment as highly efficient hydrogen and oxygen evolution reaction electrocatalyst

Xunxin Chen et al.

Summary: The structural properties and nitrogen content of MXene can be adjusted by controlling the volume ratio of NH3 and Ar in plasma gas, leading to improved electrocatalytic performance.

CHEMICAL ENGINEERING JOURNAL (2021)

Review Chemistry, Physical

Recent advances in two-dimensional Pt based electrocatalysts for methanol oxidation reaction

Hao Tian et al.

Summary: Direct methanol fuel cells (DMFCs) have attracted attention for their high energy density, but the slow kinetics of methanol oxidation reaction affects commercialization. Pt based catalysts are effective but expensive, while 2D Pt based nanostructures are considered promising for MOR.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Modulating oxygen electronic orbital occupancy of Cr-based MXenes via transition metal adsorbing for optimal HER activity

Xilin Zhang et al.

Summary: Modulating surface electronic properties of 2D MXenes using transition metal adatoms can enhance hydrogen evolution reaction activity, with optimal performance achieved by depositing Cr atom on Cr2TiC2O2 MXene. Charge transfer from transition metals to surface oxygen atoms plays a critical role in tuning hydrogen adsorption strength and HER activity.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Analytical

Fabrication of 3D interconnected porous MXene-based PtNPs as highly efficient electrocatalysts for methanol oxidation

Qiang Zhang et al.

Summary: In this study, Pt nanoparticles attached on 3D porous embossed MXene were prepared to enhance the catalytic performance and stability towards methanol oxidation reaction. A 3D interconnected porous structure was fabricated using sacrificial templates to prevent restacking of MXene nanosheets, enabling rapid electrical/ionic transport. The synthesized Pt/e-MXene composites exhibited significantly improved electrocatalytic activity and durability compared to other catalysts, providing a new guide for designing aggregation-resistant 3D porous MXene with high performance in catalysis.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2021)

Article Chemistry, Physical

Tuning the Activity of Molybdenum Carbide MXenes for CO2 Electroreduction by Embedding the Single Transition-Metal Atom

Yue Zhang et al.

Summary: M@Mo2C MXenes, such as Fe@Mo2C and Co@Mo2C, show higher activity and selectivity towards CO2 reduction to CH4, highlighting potential as promising electrocatalysts for CO2 reduction to methane or methanol at low overpotentials. Additionally, Fe@Mo2C may also reduce CO2 to C2H4 and CH3CH2OH, demonstrating its potential as a 2D electrocatalytic material for CO2 reduction to C1 and C2 products.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Chemistry, Physical

Integrated Co4MnFe3/Ti3C2: Componential and Structural Engineering toward Boosting Electrocatalytic Oxygen Evolution

Chengqiang Gan et al.

Summary: MXene, as an ideal substrate material with metal-like conductivity and hydrophilicity, shows promising application prospects in the field of electrocatalytic water decomposition. This study successfully synthesized Co4MnFe3/Ti3C2 using ultrathin two-dimensional layered Ti3C2 as substrate material, exhibiting excellent electrochemical performance in alkaline media.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Electrochemistry

Construction of Ti3C2T x MXene Supported Low-Platinum Electrocatalyst for Hydrogen Evolution Reaction by Direct Electrochemical Strategy

Xuan Jian et al.

Summary: A high-performance catalyst with ultralow-Pt nanoclusters on a two-dimensional titanium carbide MXene support was synthesized using electrophoretic deposition and cyclic voltammetry. The catalyst showed lower overpotential and Tafel slope compared to commercial Pt/C catalyst, with significantly higher turnover frequency and mass activity. Additionally, it exhibited stable performance in a long-term cycling test.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2021)

Article Chemistry, Physical

FeNi nanoparticles on Mo2TiC2Tx MXene@nickel foam as robust electrocatalysts for overall water splitting

Jiayang Wang et al.

Summary: Synthesis of composite FeNi@Mo2TiC2Tx@NF with high HER and OER activity through introducing Fe2+ ions and combining with surface nickel atoms, provides a new strategy for overall water splitting.

NANO RESEARCH (2021)

Review Chemistry, Multidisciplinary

MXenes as Superexcellent Support for Confining Single Atom: Properties, Synthesis, and Electrocatalytic Applications

Mingming Zhang et al.

Summary: MXenes serve as excellent supports for SACs due to their large specific surface area and superior electronic conductivity. The structure and property of MXenes can be manipulated by changing transition metal elements and surface termination.

SMALL (2021)

Article Chemistry, Multidisciplinary

Tuning the Chemical Properties of Co-Ti3C2Tx MXene Materials for Catalytic CO2 Reduction

Jun Ma et al.

Summary: This study demonstrates that the surface reducibility of Ti3C2Tx MXene can be tuned by N doping, leading to a change in the catalytic properties of supported Co nanoparticles. Pristine Co-Ti3C2Tx MXene favors CO production during CO2 hydrogenation, whereas CH4 production is favored when the MXene is subjected to N doping.

SMALL (2021)

Article Chemistry, Multidisciplinary

Highly Dispersed Ru Nanoparticles on Boron-Doped Ti3C2Tx (MXene) Nanosheets for Synergistic Enhancement of Electrocatalytic Hydrogen Evolution

Munkhjargal Bat-Erdene et al.

Summary: Doped MXene nanosheets with boron were developed as a solid support for hosting ruthenium nanoparticles for electrocatalytic hydrogen evolution. Theoretical calculations and experimental tests showed that boron doping can enhance reactivity and electrode kinetics of active sites, leading to improved catalytic activity.

SMALL (2021)

Article Chemistry, Multidisciplinary

Synergistic Enhancement of Electrocatalytic Nitrogen Reduction Over Boron Nitride Quantum Dots Decorated Nb2CTx-MXene

Ke Chu et al.

Summary: A novel hexagonal BN quantum dots (BNQDs) decorated Nb2CTx-MXene (BNQDs@Nb2CTx) has been explored as an efficient NRR catalyst, which shows optimum NRR activity, high Faradaic efficiency, and excellent stability, outperforming most of the state-of-the-art NRR catalysts. The synergistic interplay of BNQDs and Nb2CTx creates unique interfacial B sites serving as NRR catalytic centers, enhancing N-2 activation and impeding H-2 evolution.

SMALL (2021)

Article Chemistry, Physical

Hierarchically structured Ti3C2Tx MXene paper for Li-S batteries with high volumetric capacity

Wenli Zhao et al.

Summary: This study explores the use of MXene as a new host material to improve the electrochemical performance of Li-S batteries, successfully increasing the volumetric energy density of the batteries. Experimental results show that Ti-OH bonds in the MXene membrane effectively trigger the transformation of LiPS, and the stable charge product alpha-S-8 plays a potential important role in reducing active mass loss and enhancing cycling capability in the battery.

NANO ENERGY (2021)

Article Chemistry, Physical

A simple approach to synthesis Cr2CTx MXene for efficient hydrogen evolution reaction

Xinshu Zou et al.

Summary: This study proposes a simple strategy for synthesizing ultra-thin Cr2CTx MXenes with superior performance in hydrogen evolution reaction and high stability. The fabricated material exceeds even Pt catalyst in terms of performance, showcasing potential for practical applications.

MATERIALS TODAY ENERGY (2021)

Article Materials Science, Multidisciplinary

Synthesis of new two-dimensional titanium carbonitride Ti2C0.5N0.5Tx MXene and its performance as an electrode material for sodium-ion battery

Kun Liang et al.

Summary: A new 2D carbonitride MXene material, Ti2C0.5N0.5Tx, was reported in this study, showing higher specific capacities and larger electroactive surface area compared to traditional Ti2CTx powders. The multilayer Ti2C0.5N0.5Tx powders exhibited a specific capacity of 182 mAh g-1 at 20 mA g-1, the highest among reported MXene electrodes for SIBs, with excellent cycling stability.

INFOMAT (2021)

Article Chemistry, Physical

Rose-like, ruthenium-modified cobalt nitride nanoflowers grown in situ on an MXene matrix for efficient and stable water electrolysis

Liang Yan et al.

Summary: A novel bifunctional electrocatalyst, Ru-CoN/Ti3C2Tx MXene, has been synthesized with good conductivity and optimized electronic structure, displaying remarkable and stable performance in water electrolysis for both hydrogen and oxygen evolution reactions. This work provides a new strategy for the design and fabrication of efficient and nonprecious catalysts for electrochemical energy systems.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Physical

Constructing an electron-rich interface over an Sb/Nb2CTx-MXene heterojunction for enhanced electrocatalytic nitrogen reduction

Xingchuan Li et al.

Summary: In this study, a highly efficient NRR catalyst Sb/Nb2CTx was reported, achieving high NH3 yield and selectivity. Density functional theory calculations revealed the mechanism behind the excellent performance of this catalyst.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Physical

Pt-on-Pd bimetallic nanodendrites stereoassembled on MXene nanosheets for use as high-efficiency electrocatalysts toward the methanol oxidation reaction

Cuizhen Yang et al.

Summary: The stereoassembly of 3D porous Pt-on-Pd bimetallic nanodendrites on a 2D ultrathin Ti3C2Tx MXene matrix results in a Pt-on-Pd/Ti3C2Tx catalyst with superior electrocatalytic properties towards methanol oxidation, attributed to numerous accessible electrocatalytically active sites and optimized electronic structures. Density functional theory calculations reveal significant down shift of d-band centers and weaker CO adsorption ability for the Pt-on-Pd/Ti3C2Tx model, leading to stronger poisoning tolerance and enhanced methanol oxidation activity.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Applied

Catalytic activity of V2CO2 MXene supported transition metal single atoms for oxygen reduction and hydrogen oxidation reactions: A density functional theory calculation study

Zhongjing Deng et al.

Summary: The research investigates the potential of TM single atoms supported by V2CO2 in two-dimensional materials for ORR and HOR catalysis, finding that Mn- and Sc-V2CO2 exhibit high catalytic activity and stability, serving as excellent bifunctional catalysts for fuel cells.

CHINESE JOURNAL OF CATALYSIS (2021)

Review Chemistry, Multidisciplinary

Pyrolyzed M-Nx catalysts for oxygen reduction reaction: progress and prospects

Ergui Luo et al.

Summary: Recent research efforts on cost-effective catalysts in fuel cells, especially on the cathode, have shown promising advancements in the development of M-N-x/C materials. The focus has been on clarifying the nature of catalytic sites and utilizing advanced characterization tools to optimize synthesis methodologies. Future directions aim to achieve rational and controllable synthesis of catalysts with sufficient active sites and strategies to mitigate catalyst degradation.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

Article Chemistry, Multidisciplinary

Ni nanoparticles/V4C3Tx MXene heterostructures for electrocatalytic nitrogen fixation

Cheng-Feng Du et al.

Summary: This study reports a highly efficient NRR electrocatalyst by loading Ni nanoparticles on V4C3Tx MXene, which exhibits significantly improved NRR activity compared to other MXene derivatives and even comparable to noble-metal-based electrocatalysts. The enhanced NRR performance is attributed to a synergistic NRR route by Ni sites in the nanoparticles and the surface O vacancy of V4C3Tx MXene, demonstrating the critical role of MXene and its derivatives with surface modification as electrocatalysts.

MATERIALS CHEMISTRY FRONTIERS (2021)

Article Chemistry, Multidisciplinary

Heteroatom coordination induces electric field polarization of single Pt sites to promote hydrogen evolution activity†

Xianyun Peng et al.

Summary: Pt-SA/MXene catalyst shows efficient hydrogen evolution reaction (HER) activity in alkaline electrolytes with low overpotential and long-term stability. It has competitive mass activity and improved catalytic performance due to its unique structure and polarized electric field effect.

NANOSCALE (2021)

Article Chemistry, Multidisciplinary

Electrocatalytic CO2 reduction on earth abundant 2D Mo2C and Ti3C2 MXenes

Nuwan H. Attanayake et al.

Summary: Mo2C and Ti3C2 MXenes show high efficiency as electrocatalysts for the CO2 reduction reaction, with Mo2C exhibiting a faradaic efficiency of 90% and Ti3C2 exhibiting a faradaic efficiency of 65%. The use of an ionic liquid electrolyte suppresses the competing hydrogen evolution reaction, allowing for improved CO2 reduction efficiency.

CHEMICAL COMMUNICATIONS (2021)

Article Chemistry, Multidisciplinary

A two-dimensional MXene-supported metal-organic framework for highly selective ambient electrocatalytic nitrogen reduction

Xingyou Liang et al.

Summary: The study successfully prepared a ZIF-67@Ti3C2 catalyst for efficient electrochemical synthesis of ammonia, demonstrating excellent NH3 yield and good Faraday efficiency. The successful preparation of this catalyst expands the application of the MXene family in the electrochemical nitrogen reduction reaction.

NANOSCALE (2021)

Article Chemistry, Multidisciplinary

A hybrid plasma electrocatalytic process for sustainable ammonia production

Jing Sun et al.

Summary: The research team successfully developed a non-thermal plasma bubble column reactor to convert NOx intermediaries into ammonia at ambient conditions. Their innovative approach combines plasma-driven nitrogen oxides generation with electrocatalytic reduction for scalable green ammonia production.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

Review Chemistry, Physical

3D Carbon Materials for Efficient Oxygen and Hydrogen Electrocatalysis

Ana Belen Jorge et al.

ADVANCED ENERGY MATERIALS (2020)

Review Chemistry, Multidisciplinary

CO2 Reduction: From Homogeneous to Heterogeneous Electrocatalysis

Sheng Zhang et al.

ACCOUNTS OF CHEMICAL RESEARCH (2020)

Article Nanoscience & Nanotechnology

MXene Surface Terminations Enable Strong Metal-Support Interactions for Efficient Methanol Oxidation on Palladium

Zhiquan Lang et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Article Chemistry, Physical

Facile CO Oxidation on Oxygen-functionalized MXenes via the Mars-van Krevelen Mechanism

Hassan A. Tahini et al.

CHEMCATCHEM (2020)

Review Chemistry, Multidisciplinary

Current Challenges and Routes Forward for Nonaqueous Lithium-Air Batteries

Tao Liu et al.

CHEMICAL REVIEWS (2020)

Article Engineering, Chemical

Platinum Nanoparticle-Deposited Ti3C2Tx MXene for Hydrogen Evolution Reaction

Xiaobao Zhang et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2020)

Article Nanoscience & Nanotechnology

Pd/MXene(Ti3C2Tx)/reduced graphene oxide hybrid catalyst for methanol electrooxidation

Peng Zhang et al.

NANOTECHNOLOGY (2020)

Article Chemistry, Physical

Molecular enhancement of heterogeneous CO2 reduction

Dae-Hyun Nam et al.

NATURE MATERIALS (2020)

Article Chemistry, Physical

MXene Materials for the Electrochemical Nitrogen Reduction-Functionalized or Not?

Luke R. Johnson et al.

ACS CATALYSIS (2020)

Article Chemistry, Multidisciplinary

Ambient Growth of Hierarchical FeOOH/MXene as Enhanced Electrocatalyst for Oxygen Evolution Reaction

Kaixin Zhao et al.

CHEMISTRYSELECT (2020)

Article Multidisciplinary Sciences

Realization of 2D crystalline metal nitrides via selective atomic substitution

Jun Cao et al.

SCIENCE ADVANCES (2020)

Article Chemistry, Multidisciplinary

Basal Plane Hydrogen Evolution Activity from Mixed Metal Nitride MXenes Measured by Scanning Electrochemical Microscopy

Abdoulaye Djire et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Article Chemistry, Multidisciplinary

Ultrastable MXene@Pt/SWCNTs' Nanocatalysts for Hydrogen Evolution Reaction

Cong Cui et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Review Chemistry, Multidisciplinary

MXene Printing and Patterned Coating for Device Applications

Yi-Zhou Zhang et al.

ADVANCED MATERIALS (2020)

Article Chemistry, Physical

Pt nanowire/Ti3C2Tx-CNT hybrids catalysts for the high performance oxygen reduction reaction for high temperature PEMFC

Ranran Wang et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

Article Chemistry, Physical

3d transitional-metal single atom catalysis toward hydrogen evolution reaction on MXenes supports

Zihan Shen et al.

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