MoSe/BiSe Heterostructure Immobilized in N-Doped Carbon Nanosheets Assembled Flower-Like Microspheres for High-Rate Sodium Storage.

A key challenge for sodium-ion batteries (SIBs) lies in identifying suitable host materials capable of accommodating large Na ions while addressing sluggish chemical kinetics. The unique interfacial effects of heterogeneous structures have emerged as a critical factor in accelerating charge transfer and enhancing reaction kinetics. Herein, MoSe/BiSe composites integrated with N-doped carbon nanosheets are synthesized, which spontaneously self-assemble into flower-like microspheres (MoSe/BiSe@N-C).

A NiCo alloy particle-decorated TiO nanoarray as an efficient electrocatalyst for nitrite reduction to ammonia.

Electrocatalytic nitrite (NO) reduction (NORR) is a potential environmentally friendly method for producing NH efficiently. Herein, a hybrid catalyst with NiCo alloy particles uniformly decorated on a TiO nanograss array (NiCo-TiO) is reported to display excellent NORR performance. In alkaline media, NiCo-TiO possesses a large NH yield of 18 736.

Facile Synthesis of a CuMoO Nanosheet Array for Electrochemical Reduction of Nitrite to Ammonia in Neutral Solution.

Electrochemical nitrite (NO) is a promising technology for NO removal and a sustainable method for generating valuable ammonia (NH), but this process is intricate and generates other byproducts. In this work, we propose a facile and low-cost method for the preparation of a CuMoO nanosheet array, which can serve as an efficient electrocatalyst for the reduction of NO to NH. The morphology of CuMoO can be adjusted by controlling the synthesis conditions.

Se-Doped CoS@MoS Heterostructures on Multiwalled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Alkaline Overall Water Splitting.

The use of efficient and affordable non-precious metal catalysts for hydrogen and oxygen evolution reactions is vital for replacing and widely implementing new energy sources. Nevertheless, improving the catalytic performance of these non-precious-metal bifunctional electrocatalysts continues to be a major challenge. In this article, an optimized Se-incorporated bulk CoS@MoS heterostructure grown on the surface of carbon nanotubes is reported.

Crystal structure regulation of trititanium pentoxide for advanced zero-strain lithium storage anode.

Significant advancements have been made in electric vehicles and consumer devices. However, lithium-ion batteries with commercial graphite anodes still face challenges owing to their sluggish lithium-ion kinetics, low lithiation potential, and limited cycle stability. Consequently, there is a considerable research interest in developing new anode materials with rich resources, "zero-strain" characteristics for long-term cycling, and outstanding electrochemical properties.

Rapid Growth of BiSe Nanodots on MXene Nanosheets at Room Temperature for Promoting Sulfur Redox Kinetics.

Li-S batteries are hampered by problems with their cathodes and anodes simultaneously. The improvement of Li-S batteries needs to consider both the anode and cathode. Herein, a BiSe@MXene composite is prepared for the first time by rapidly growing BiSe nanodots on two-dimensional (2D) MXene nanosheets at room temperature through simply adding high-reactive hydroxyethylthioselenide in Bi/MXene aqueous solution.

Study on exosomes for identifying bipolar disorder in early stage: A cross-sectional and validation study protocol.

Background: The difficulty is remained to accurately distinguish bipolar disorder (BD) from major depressive disorder (MDD) in early stage, with a delayed diagnosis for 5-10 years. BD patients are often treated with antidepressants systematically due to being diagnosed with MDD, affecting the disease course and clinical outcomes. The current study aims to explore the role of plasma exosomes as biomarker to distinguish BD from MDD in early stage.

One-step growth of ultrathin CoSe nanobelts on N-doped MXene nanosheets for dendrite-inhibited and kinetic-accelerated lithium-sulfur chemistry.

The practical application of lithium-sulfur (Li-S) batteries is inhibited by the shuttle effect of lithium polysulfides (LiPSs) and slow polysulfide redox kinetics on the S cathode as well as the uncontrollable growth of dendrites on the Li metal anode. Therefore, both cathode and anode sides must be considered when modifying Li-S batteries. Herein, two-dimensional (2D) ultrathin CoSe nanobelts are in situ grown on 2D N-doped MXene nanosheets (CoSe@N-MXene) via one-step solvothermal process for the first time.

Self-Zincophilic Dual Protection Host of 3D ZnO/Zn⊂CF to Enhance Zn Anode Cyclability.

Zn dendrite growth and side reactions restrict the practical use of Zn anode. Herein, the design of a novel 3D hierarchical structure is demonstrated with self-zincophilic dual-protection constructed by ZnO and Zn nanoparticles immobilized on carbon fibers (ZnO/Zn⊂CF) as a versatile host on the Zn surface. The unique 3D frameworks with abundant zinc nucleation storage sites can alleviate the structural stress during the plating/stripping process and overpower Zn dendrite growth by moderating Zn flux.

Internal Vanadium Doping and External Modification Design of P2-Type Layered Mn-Based Oxides as Competitive Cathodes toward Sodium-Ion Batteries.

P2-type layered manganese-based oxides have attracted considerable interest as economical, cathode materials with high energy density for sodium-ion batteries (SIBs). Despite their potential, these materials still face challenges related to sluggish kinetics and structural instability. In this study, a composite cathode material, NaNiMnVO@NaVO(PO)F was developed by surface-coating P2-type NaNiMnVO with a thin layer of NaVO(PO)F to enhance both the electrochemical sodium storage and material air stability.

Synthesis of multi-cavity mesoporous carbon nanospheres through solvent-induced self-assembly: Anode material for sodium-ion batteries with long-term cycle stability.

Mesoporous carbon nanospheres (MCSs) are extensively employed in energy storage applications due to their ordered pore size, large specific surface area (SSA), and abundant active sites, resulting in excellent electrochemical performance for sodium storage. However, challenges persist in achieving precise structural control and stable synthesis reactions for these MCSs. Additionally, employing MCSs with a larger SSA in sodium storage applications can lead to increased side reactions and potential structural instability.

Modulating Coordination of Iron Atom Clusters on N,P,S Triply-Doped Hollow Carbon Support towards Enhanced Electrocatalytic Oxygen Reduction.

Constructing atom-clusters (ACs) with in situ modulation of coordination environment and simultaneously hollowing carbon support are critical yet challenging for improving electrocatalytic efficiency of atomically dispersed catalysts (ADCs). Herein, a general diffusion-controlled strategy based on spatial confining and Kirkendall effect is proposed to construct metallic ACs in N,P,S triply-doped hollow carbon matrix (M /NPS-HC, M=Mn, Fe, Co, Ni, Cu). Thereinto, Fe /NPS-HC with the best catalytic activity for oxygen reduction reaction (ORR) is thoroughly investigated.

NiMoO nanorods with oxygen vacancies self-supported on Ni foam towards high-efficiency electrocatalytic conversion of nitrite to ammonia.

As an eco-friendly and sustainable strategy, the electrochemical reduction of nitrite (NO) can simultaneous generation of NH and treatment of NO contamination in the environment. Herein, monoclinic NiMoO nanorods with abundant oxygen vacancies self-supported on Ni foam (NiMoO/NF) are considered high-performance electrocatalysts for ambient NH synthesis by reduction of NO, which can deliver an outstanding yield of 18089.39 ± 227.

Binary Sulfiphilic Nickel Boride on Boron-Doped Graphene with Beneficial Interfacial Charge for Accelerated Li-S Dynamics.

The "shuttle effect" and slow conversion kinetics of lithium polysulfides (LiPSs) are stumbling block for high-energy-density lithium-sulfur batteries (LSBs), which can be effectively evaded by advanced catalytic materials. Transition metal borides possess binary LiPSs interactions sites, aggrandizing the density of chemical anchoring sites. Herein, a novel core-shelled heterostructure consisting of nickel boride nanoparticles on boron-doped graphene (Ni B/BG), is synthesized through a graphene spontaneously couple derived spatially confined strategy.

Copper-based catalysts for the electrochemical reduction of carbon dioxide: progress and future prospects.

There is an urgent need for the development of high performance electrocatalysts for the CO reduction reaction (CORR) to address environmental issues such as global warming and achieve carbon neutral energy systems. In recent years, Cu-based electrocatalysts have attracted significant attention in this regard. The present review introduces fundamental aspects of the electrocatalytic CORR process together with a systematic examination of recent developments in Cu-based electrocatalysts for the electroreduction of CO to various high-value multicarbon products.

Enhanced cycling stability and storage performance of NaNiMnTiOF cathode materials by Mn-rich shells and Ti doping.

We propose a synergistic strategy of titanium doping and surface coating with a Mn-rich shell to modify the Na-rich manganese-oxide-based cathode material NaNiMnTiOF in sodium-ion batteries and elucidate the underlying mechanism for enhanced material performance. First, it is found that the electrochemical performance of the proposed cathode material can be effectively improved when the Ti doping amount is x = 0.3.

Morphology-Controlled Synthesis of VS for Electrocatalytic Hydrogen Evolution Reaction in Acid Media.

High-performance low-cost catalysts are in high demand for the hydrogen evolution reaction (HER). In the present study, we reported that VS materials with flower-like, flake-like, and porous morphologies were successfully synthesized by hydrothermal synthesis and subsequent calcination. The effects of morphology on hydrogen evolution performance were studied.

Dual-Functional Hosts for Polysulfides Conversion and Lithium Plating/Stripping towards Lithium-Sulfur Full Cells.

The practical application of lithium-sulfur (Li-S) batteries is greatly hindered by the shuttle effect of dissolved polysulfides in the sulfur cathode and the severe dendritic growth in the lithium anode. Adopting one type of effective host with dual-functions including both inhibiting polysulfide dissolution and regulating Li plating/stripping, is recently an emerging research highlight in Li-S battery. This review focuses on such dual-functional hosts and systematically summarizes the recent research progress and application scenarios.

Defective nanomaterials for electrocatalysis oxygen reduction reaction.

The difficulties in O molecule adsorption/activation, the cleavage of the O-O bond, and the desorption of the reaction intermediates at the surface of the electrodes make the cathodic oxygen reduction reaction (ORR) for fuel cells show extremely sluggish kinetics. Thus, it is important to the exploitation of highly active and stable electrocatalysts for the ORR to promote the performance and commercialization of fuel cells. Many studies have found that the defects affect the electron and the geometrical structure of the catalyst.

Multifunctional Atomic Molybdenum on Graphene with Distinctive Coordination to Solve Li and S Electrochemistry.

The improvement of lithium-sulfur batteries is still impeded by notorious shuttling effect and sluggish kinetics on the S cathode, and rampant Li dendrite formation on the Li anode makes it worse. Herein, a type of single-atom dispersed Mo on nitrogen-doped graphene (Mo/NG) with a distinctive Mo-N O -C coordination structure first serving as a multifunctional material is designed by a structure-oriented strategy to solve Li and S electrochemistry. Mo/NG with superior intrinsic properties endowed by the unique coordination configuration adsorbs soluble polysulfides and promotes bidirectional conversion of LiPSs at the cathode side.

Molybdenum Oxynitride Atomic Nanoclusters Bonded in Nanosheets of N-Doped Carbon Hierarchical Microspheres for Efficient Sodium Storage.

Transition metal nitrides have attracted considerable attention as great potential anode materials due to their excellent metallic conductivity and high theoretical specific capacity. However, their cycling performance is impeded by their instability caused by the reaction mechanism. Herein, we report the engineering and synthesis of a novel hybrid architecture composed of MoON atomic nanoclusters bonded in nanosheets of N-doped carbon hierarchical hollow microspheres (MoON/NC) as an anode material for sodium-ion batteries.

High-Efficiency Ammonia Electrosynthesis on Anatase TiO Nanobelt Arrays with Oxygen Vacancies by Selective Reduction of Nitrite.

Electrocatalytic reduction of nitrite to NH provides a new route for the treatment of nitrite in wastewater, as well as an attractive alternative to NH synthesis. Here, we report that an oxygen vacancy-rich TiO nanoarray with different crystal structures self-supported on the Ti plate can be prepared by hydrothermal synthesis and by subsequently annealing it in an Ar/H atmosphere. Anatase TiO (A-TiO) can be a superb catalyst for the efficient conversion of NO to NH; a high NH yield of 12,230.

Construction of VS flower spheres for efficient aqueous Zn-ion batteries.

Aqueous zinc-ion batteries (AZIBs) have become a focus due to their high safety, low cost, and environmental protection. Vanadium-based materials are commonly used as cathodes in AZIBs. As technology improves, more types of vanadium-based materials are successfully synthesized and applied.

Fabrication of Ni-Cu-W Graded Coatings by Plasma Spray Deposition and Laser Remelting.

In this study, Ni-Cu-W graded coatings are produced by atmospheric plasma spraying and subsequently remelted by laser. The surface morphology, hardness, compositional fluctuations and corrosion resistance of the Ni-Cu-W coating are investigated. The coatings after laser remelting are densified and become more homogenous with an excellent corrosion resistance and high hardness, which can be used to explore the new materials.

Effects of Fe-Ions Irradiation on the Microstructure and Mechanical Properties of FeCrAl-1.5wt.% ZrC Alloys.

Fe-13Cr-3.5Al-2.0Mo-1.