Competitive adsorption and strain modulation induced by low electronegative elements to improve phosphate tolerance in HT-PEMFC.

The cathode Pt-based electrocatalyst, a core component of high-temperature proton exchange membrane fuel cells (HT-PEMFCs), significantly influences fuel cell efficiency. At high temperatures and strongly acidic pH, phosphoric acid tends to adsorb onto the Pt surface by forming PtO bonds, covering the catalyst's active sites. Phosphoric acid anions' toxicity towards Pt significantly impairs the oxygen reduction reaction (ORR) kinetics, posing a major obstacle to the commercial viability of this technology.

MOF-derived nitrogen, sulfur, cobalt, and copper co-doped graphite felt for high-efficiency vanadium redox flow battery electrodes.

The low electrocatalytic activity of pristine graphite felt (GF) electrodes towards V(II)/V(III) and V(IV)/V(V) redox couples poses a significant challenge in vanadium redox flow batteries (VRFBs). Here, Metal-organic frameworks (MOFs) containing Cu, Co, N, and S are proposed as precursors for the construction of metal and nonmetal co-doped GF electrodes, which exhibit enhanced catalytic activity compared to pristine GF electrodes. The synergistic effect of the metal and nonmetal components results in the N,S/Cu,Co@GF electrode exhibiting increased hydrophilicity, electrochemical reactivity, and reversibility.

Embedding Coupled Pd/Fe Sites in Electrospun MOF-Derived Carbon Nanofibers Achieves Efficient and Durable Oxygen Reduction Catalysis.

High costs, poor durability of Pt electrocatalysts, and the low performance of non-precious metals hinder the large-scale commercialization of fuel cells. To address these challenges, a bimetallic, highly dispersed catalyst containing Pd and Fe uniformly distributed on porous nitrogen-doped carbon nanofibers was developed. This catalyst demonstrated remarkable oxygen reduction catalytic performance.

Breaking Aggregation State to Achieve Low-Temperature Fast Charging of Lithium Metal Batteries.

Insufficient ionic conductivity and elevated desolvation energy barrier of electrolytes limit the low-temperature applications of lithium metal batteries (LMBs). Weakly solvating electrolytes (WSEs), with limited lithium salt dissociation capability, are prone to desolvate and drive anion-rich aggregates (AGGs). However, significant AGGs result in increased viscosity and low ionic mobility, contributing to battery failure at low temperatures (≤-20 °C).

Electronic Buffering Mechanism Enhances Stability and Water Oxidation Efficiency of CeO@NiFe-LDH.

Nickel-iron layered double hydroxide shows significant promise as an electrocatalyst in facilitating oxygen evolution reactions. But its development is hindered by low conductivity and insufficient cycling stability. Herein, the synthesis of a hierarchically structured heterostructure catalyst, CeO@NiFe LDH, is reported through a straightforward two-step process involving hydrothermal treatment.

Emerging two dimensional MXene for corrosion protection in new energy systems: Design and mechanisms.

With the development of new and clean energy (offshore wind power, fuel cells, aqueous zinc ion batteries, lithium-ion batteries, etc.), the corrosion and security problems in special environments of the new energy system have attracted much attention. Corrosion protection on the metals applied in new energy system can reduce the economic loss, security risk, and energy consumption, as well as guarantee the efficiency of energy system.

Toward self-healing two dimensional MXene coatings for corrosion protection on metals: Design strategies and mechanisms.

Metallic corrosion leads to high economic losses and security risks, and coating protection is an effective approach to preventing metal from corrosion. However, defects such as cracks and micropores are inevitable in the coating, so it is urgent to develop self-healing coatings for realizing long-term corrosion protection due to the actively protective ability. Though two-dimensional (2D) transition metal carbide or nitride (MXene) coatings have been employed to realize self-healing function, the design strategies of the MXene-based coatings and mechanism on how MXenes inhibit corrosion at the coating-metal interface as well as the roles of MXene in self-healing process remain elusive.

CoFe Hydroxide Nanospheres for Enhanced Alkaline Water Splitting and Seawater Oxidation:Anion Doping Effects of Fluorine and Carbonate.

Green hydrogen production can be achieved through electrolysis of fresh water or the use of renewable energy to electrolyze seawater. However, due to the low activity and poor stability of oxygen evolution reaction catalysts, direct electrolysis of alkaline seawater faces significant challenges. Herein, The catalyst F-CoFe(OH)-CO/NF with three-dimensional nanosphere structure was prepared, The introduction of CO into the intermediate layer of CoFe hydroxide improves the corrosion resistance of alkaline electrolyte and the doping of F is to design three-dimensional layered nanostructures, increase the active site, and accelerate the diffusion of the electrolyte.

A High Capacity p-Type Organic Cathode Material for Aqueous Zinc Batteries.

P-type organic cathode materials typically exhibit high redox potentials and fast redox kinetics, presenting broad application prospects in aqueous zinc batteries (AZBs). However, most of the reported p-type organic cathode materials exhibit limited capacity (<100 mAh g), which is attributable to the low mass content ratio of oxidation-reduction active functional groups in these materials. Herein, we report a high-capacity p-type organic material, 5,12-dihydro-5,6,11,12-tetraazatetracene (DHTAT), for aqueous zinc batteries.

In Situ Encapsulation of SnS/MoS Heterojunctions by Amphiphilic Graphene for High-Energy and Ultrastable Lithium-Ion Anodes.

Lithium-ion batteries with transition metal sulfides (TMSs) anodes promise a high capacity, abundant resources, and environmental friendliness, yet they suffer from fast degradation and low Coulombic efficiency. Here, a heterostructured bimetallic TMS anode is fabricated by in situ encapsulating SnS/MoS nanoparticles within an amphiphilic hollow double-graphene sheet (DGS). The hierarchically porous DGS consists of inner hydrophilic graphene and outer hydrophobic graphene, which can accelerate electron/ion migration and strongly hold the integrity of alloy microparticles during expansion and/or shrinkage.

Ultrathin Ni-Fe MOF Nanosheets: Efficient and Durable Water Oxidation at High Current Densities.

Efficient, durable, and economical electrocatalysts are crucial for advancing energy technology by facilitating the oxygen evolution reaction (OER). Here, ultrathin Ni-Fe metal-organic skeleton (MOF) nanosheets were created in situ on nickel foam (NiFe-UMNs/NF). The catalyst exhibited excellent OER catalytical abilities, with only 269 mV overpotentials at 250 mA cm.

Oxygen Vacancy-Enhanced NiN-CeO/NF Nanoparticle Catalysts for Efficient and Stable Electrolytic Water Splitting.

Highly efficient and cost-effective electrocatalysts are of critical significance in the domain of water electrolysis. In this study, a NiN-CeO/NF heterostructure is synthesized through a facile hydrothermal technique followed by a subsequent nitridation process. This catalyst is endowed with an abundance of oxygen vacancies, thereby conferring a richer array of active sites.

Calcium Single Atom Confined in Nitrogen-Doped Carbon-Coupled Polyvinylidene Fluoride Membrane for High-Performance Piezocatalysis.

A piezoelectric polymer membrane based on single metal atoms was demonstrated to be effective by anchoring isolated calcium (Ca) atoms on a composite of nitrogen-doped carbon and polyvinylidene fluoride (PVDF). The addition of Ca-atom-anchored carbon nanoparticles not only promotes the formation of the β phase (from 29.8 to 56.

Porous layered ZnVO@C synthesized based on a bimetallic MOF as a stable cathode material for aqueous zinc ion batteries.

Vanadium-based oxides are considered potential cathode materials for aqueous zinc ion batteries (AZIBs) due to their distinctive layered (or tunnel) structure suitable for zinc ion storage. However, the structural instability and sluggish kinetics of vanadium-based oxides have limited their capacity and cycling stability for large-scale applications. To overcome these shortcomings, here a porous vanadium-based oxide doped with zinc ions and carbon with the molecular formula ZnVO@C (ZVO@C) as the cathode material is synthesized by the pyrolysis of a bimetallic MOF precursor containing Zn/V.

In Situ Construction of a Hydrophobic Honeycomb-like Structured ZnMoO Coating Applied for Enhancing Zinc Anode Performance.

Aqueous zinc-ion batteries (AZIBs) suffer from sharp cycling deterioration due to serious interfacial side reactions and corrosion problems on the zinc anode. Herein, an efficacious approach to construct hydrophobic ZnMoO coatings on Zn (denoted as Zn@ZMO) is proposed to mitigate direct contact between the zinc anode and electrolyte and enhance its cycle life. The hydrophobic ZnMoO layer (contact angle = 128°) with a honeycomb-like structure is prepared by an in situ liquid phase deposition method.

Oxygen Vacancy and Heterostructure Modulation of CoP/FeP Electrocatalysts for Improving Total Water Splitting.

Designing a stable and highly active catalyst for hydrogen evolution and oxygen evolution reactions (HER/OER) is essential for the industrialization of hydrogen energy but remains a major challenge. This work reports a simple approach to fabricating coupled CoP/FeP nanorod array catalyst for overall water decomposition, demonstrating the source of excellent activity in the catalytic process. Under alkaline conditions, CoP/FeP heterostructures exhibit an overpotential of 96 and 220 mV for HER and OER, respectively, at 10 mA cm.

Research Progress on the Composite Methods of Composite Electrolytes for Solid-State Lithium Batteries.

In the current challenging energy storage and conversion landscape, solid-state lithium metal batteries with high energy conversion efficiency, high energy density, and high safety stand out. Due to the limitations of material properties, it is difficult to achieve the ideal requirements of solid electrolytes with a single-phase electrolyte. A composite solid electrolyte is composed of two or more different materials.

Sulfonyl Molecules Induced Oriented Lithium Deposition for Long-Term Lithium Metal Batteries.

Dendrites growth and unstable interfacial Li transport hinder the practical application of lithium metal batteries (LMBs). Herein, we report an active layer of 2,4,6-trihydroxy benzene sulfonyl fluorine on copper substrate that induces oriented Li deposition and generates highly crystalline solid-electrolyte interphase (SEI) to achieve high-performance LMBs. The lithiophilic -SO groups of highly crystalline SEI accept the rapidly transported Li ions and form a dense inner layer of LiF and Li N, which regulate Li plating morphology along the (110) crystal surface toward dendrite-free Li anode.

High-performance bismuth vanadate photoanodes cocatalyzed with nitrogen, sulphur co-doped ferrocobalt-metal organic frameworks thin layer for photoelectrochemical water splitting.

In this study, we prepare a highly efficient BiVO photoanode co-catalyzed with an ultrathin layer of N, S co-doped FeCo-Metal Organic Frameworks (MOFs) for photoelectrochemical water splitting. The introduction of N and S into FeCo-MOFs enhances electron and mass transfer, exposing more catalytic active sites and significantly improving the catalytic performance of N, S co-doped FeCo-based MOFs in water oxidation. The optimized BiVO/NS-FeCo-MOFs photoanode exhibits impressive results, with a photocurrent density of 5.

Bio-inspired TiCT MXene composite coating for enhancing corrosion resistance of aluminum alloy in acidic environments.

Aluminum alloy (Al alloy) suffers from severe corrosion in acidic solution. Two-dimensional (2D) MXene-based composite coatings show great prospects for corrosion protection on metals used in special conditions. The composite coatings still face challenges in complex functionalization and orientation control.

Three dimensional nickel foam carried sea urchin-like copper-cobalt-cerium cathode for enhanced tetracycline wastewater purification in photocatalytic fuel cell.

Photocatalytic fuel cells (PFCs) regarded as a potential sustainable technique, have been broadly reported. In this work, the carbon quantum dot-loaded TiO photoanode and sea urchin-like CuCoCe ternary metal oxide cathode materials are successfully synthesized and used to construct PFC systems for efficient tetracycline (TC) degradation (45 mg/L) and simultaneous electricity generation. The results demonstrate that the CQDs-modified TiO photoanode has improved absorption intensity in both the UV and visible regions, and the photocurrent density at 1.

Layered porous MnVO@C with manganese and carbon provided by a metal-organic framework precursor as a cathode material for aqueous zinc-ion batteries.

At present, vanadium-based cathodes for aqueous zinc-ion batteries (AZIBs) are limited by their slow reaction kinetics, poor electrical conductivity, and low capacity retention. To overcome these problems, here, we design a layered porous MnVO@C as the cathode material for AZIBs using a manganese-containing metal-organic framework as a template through a simple solvothermal method. Such an electrode delivers an excellent specific capacity (380 mA h g at 0.

Electrodeposition-Assisted Crystal Growth Regulation of PdBi Clusters on Carbon Cloths for Ethanol Oxidation.

Carbon-supported Pd-based clusters are one of the most promising anodic catalysts for ethanol oxidation reaction (EOR) due to their encouraging activity and practical applications. However, unclear growth mechanism of Pd-based clusters on the carbon-based materials has hindered their extensive applications. Herein, we first introduce multi-void spherical PdBi cluster/carbon cloth (PdBi/CC) composites by an electrodeposition routine.

LiBi/LiO layer with uniform built-in electric field distribution for dendrite free lithium metal batteries.

Lithium metal batteries have garnered significant attention as a promising energy storage technology, offering high energy density and potential applications across various industries. However, the formation of lithium dendrites during battery cycling poses a considerable challenge, leading to performance degradation and safety hazards. This study aims to address this issue by investigating the effectiveness of a protective layer on the lithium metal surface in inhibiting dendrite growth.

Flower ball cathode assembled from Cu doped CoS/NiS ultrathin nanosheets in a photocatalytic fuel cell for efficient photoelectrochemical rifampicin purification and simultaneous electricity generation based on a CuO QDs/TiO/WO photoanode.

Herein, an efficient CuO QDs/TiO/WO photoanode and a Cu doped CoS/NiS cathode were successfully synthesized. The optimized CuO QDs/TiO/WO photoanode achieved a photocurrent density of 1.93 mA cm at 1.