Electron rearrangement at the crystalline-amorphous heterogeneous interface boosts alkaline hydrogen production.

Modifying the platinum (Pt) local reaction microenvironment is a critical and complex challenge in enhancing electrochemical performance. Herein, amorphous Co(OH) and crystalline Pt (labeled as ac-Pt@Co(OH)) featuring abundant crystalline-amorphous (c-a) interfaces are designed to boost the hydrogen evolution reaction (HER). The engineered structure creates an advantageous chemical environment at the local level, enhancing hydrogen adsorption efficiency and resulting in exceptional HER performance.

Anti-corrosive tin oxide modified carbon support for platinum nanoparticles enables robust oxygen reduction reaction.

The stability of platinum (Pt)-based catalysts supported on carbon black is significantly compromised during the oxygen reduction reaction due to the corrosion susceptibility of disordered carbon domains under highly acidic conditions. In this study, we present a novel tin oxide modified carbon support (C@SnO) designed to enhance Pt-based catalytic performance by protecting disordered carbon domains and optimizing electronic metal-support interactions (EMSI). The optimized 1.

Dynamic modulation of electron redistribution at the heterogeneous interface nickel hydroxides/platinum boosts acidic oxygen reduction reaction.

The interfacial electron interactions in heterogeneous catalysts are critical in determining the adsorption strengths and configurations of reaction intermediates, which are essential for the efficiency of multistep tandem catalytic processes. Amorphous-crystalline (a-c) heterostructures have garnered significant interest due to their unusual atomic arrangements, adaptable electron configurations, and exceptional stability. Here, we introduce a mesoporous a-c heterojunction catalyst featuring enriched amorphous-crystalline Ni(OH)/Pt boundaries (ac-Ni(OH)@m-Pt), designed for efficient acidic oxygen reduction reaction (ORR).

Tantalum-induced reconstruction of nickel sulfide for enhanced bifunctional water splitting: Separate activation of the lattice oxygen oxidation and hydrogen spillover.

Designing highly active and stable bifunctional catalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) under alkaline conditions is crucial for sustainable overall water splitting. Herein, we present a targeted reconstruction of NiS by introducing tantalum, achieving remarkable overall water splitting performance through the separate activation of the lattice oxygen mechanism and hydrogen spillover. Electrochemical Mass Spectrometry and in-situ Raman spectroscopy reveal that tantalum induces NiS to reconstruct into nickel hydroxide during OER, thereby enhancing catalytic activity via the activation of the lattice oxygen mechanism.

Highly-Branched PtCu Nanocrystals with Low-Coordination for Enhanced Oxygen Reduction Catalysis.

Low-coordination platinum-based nanocrystals emanate great potential for catalyzing the oxygen reduction reactions (ORR) in fuel cells, but are not widely applied owing to poor structural stability. Here, several PtCu nanocrystals (PtCu NCs) with low coordination numbers were prepared via a facile one-step method, while the desirable catalyst structures were easily obtained by adjusting the reaction parameters. Wherein, the PtCu NCs catalyst with abundant twin boundaries and high-index facets displays 15.

Enhancing Localized Electron Density over PdCu Decorated Oxygen Defective TiO Nanoarray for Electrocatalytic Nitrite Reduction to Ammonia.

Electrocatalytic nitrite (NO ) reduction to ammonia (NH) is a promising method for reducing pollution and aiding industrial production. However, progress is limited by the lack of efficient selective catalysts and ambiguous catalytic mechanisms. This study explores the loading of PdCu alloy onto oxygen defective TiO, resulting in a significant increase in NH yield (from 70.

Microwave heating-assisted synthesis of ultrathin platinum-based trimetallic nanosheets as highly stable catalysts towards oxygen reduction reaction in acidic medium.

There are currently almost no ternary platinum-based nanosheets used for acidic oxygen reduction reactions (ORR) due to the difficulty in synthesizing ternary nanosheets with high Pt content. In this work, several ultrathin platinum-palladium-copper nanosheets (PtPdCu NSs) with a thickness of around 1.90 nm were prepared via a microwave heating-assisted method.

Spin-degree manipulation for one-dimensional room-temperature ferromagnetism in a haldane system.

The intricate correlation between lattice geometry, topological behavior and charge degrees of freedom plays a key role in determining the physical and chemical properties of a quantum-magnetic system. Herein, we investigate the introduction of the unusual oxidation state as an alternative pathway to modulate the magnetic ground state in the well-known = 1 Haldane system nickelate YBaNiO (YBNO). YBNO is topologically reduced to incorporate d-Ni ( = 1/2) in the one-dimensional Haldane chain system.

Voltage activation induced MoO dissolution to enhance performance of iron doped nickel molybdate for oxygen evolution reaction.

Transition metal-based precatalysts are typically voltage-activated before electrochemical testing in the condition of alkaline oxygen evolution reaction. Nevertheless, the impact of voltage on the catalyst and the anion dissolution is frequently disregarded. In this study, Fe-doped NiMoO (Fe-NiMoO) was synthesized as a precursor through a straightforward hydrothermal method, and MoFe-modified Ni (oxygen) hydroxide (MoFe-NiOH) was obtained via cyclic voltammetry (CV) activation.

A Doping-Induced SrCoFeO/CoFeO Nanocomposite for Efficient Oxygen Evolution in Alkaline Media.

Perovskite and spinel oxides are promising alternatives to noble metal-based electrocatalysts for oxygen evolution reaction (OER). Herein, a novel perovskite/spinel nanocomposite comprised of SrCoFeO and CoFeO (SCF/CF) is prepared through a simple one-step method that incorporates iron doping into a SrCoO matrix, circumventing complex fabrication processes typical of these materials. At a Fe dopant content of 60%, the CoFeO spinel phase is directly precipitated from the parent SrCoFeO perovskite phase and the number of active B-site metals (Co/Fe) in the parent SCF can be maximized.

Visible light-driven sliver-modified titanium dioxide / bismuth molybdenum oxide with rapid interfacial charge-transfer for dual highly efficient photocatalytic degradation and disinfection.

Enhancing interfacial charge transfer is a promising approach to improve the efficiency of photocatalysts. This research effectively exploited an Ag-modified Z-scheme TiO/BiMoO heterojunction for photocatalytic degradation and disinfection under visible light. The catalyst was fabricated using simple hydrothermal and photo-deposition methods, and the characterization outcomes revealed that a built-in electric field (BIEF) was generated in the TiO/BiMoO heterojunctions, which significantly promotes the separation of photogenerated carriers and increases light absorption efficiency.

Oxyanion Engineering Suppressed Iron Segregation in Nickel-Iron Catalysts Toward Stable Water Oxidation.

Nickel-iron catalysts represent an appealing platform for electrocatalytic oxygen evolution reaction (OER) in alkaline media because of their high adjustability in components and activity. However, their long-term stabilities under high current density still remain unsatisfactory due to undesirable Fe segregation. Herein, a nitrate ion (NO ) tailored strategy is developed to mitigate Fe segregation, and thereby improve the OER stability of nickel-iron catalyst.

Sulfur vacancy and p-n junction synergistically boosting interfacial charge transfer and separation in ZnInS/NiWO heterostructure for enhanced photocatalytic hydrogen evolution.

Constructing a p-n heterojunction with vacancy is advantageous for speeding up carrier separation and migration due to the synergy of the built-in electric field and electron capture of the vacancy. Herein, a sulfur vacancy riched-ZnInS/NiWO p-n heterojunction (VZIS/NWO) photocatalyst was rationally designed and fabricated for photocatalytic hydrogen evolution. The composition and structure of VZIS/NWO were characterized.

Axial Ligand as a Critical Factor for High-Performance Pentagonal Bipyramidal Dy(III) Single-Ion Magnets.

The choice of axial ligands is of great importance for the construction of high-performance Dy-based single-molecule magnets (SMMs). Here, combining axial ligands PhSiO (anion of triphenylsilanol) and 2,6-dichloro-4-nitro-PhO (the anion of 2,6-dichloro-4-nitrophenol) with a neutral macrocyclic ligand 2,14-dimethyl-3,6,10,13,19-pentaazabicyclo[13.3.

Multiple chemical valences induced interface regulation in perovskite nickelate/carbon nitride for boosting photocatalytic hydrogen evolution.

Recent developments in transition metal-based photocatalysts have heightened the need for superior solar utilization. Evidence suggests that properly adjusting the chemical valence of the transition metal elements could simultaneously achieve broad-spectrum absorption and efficient charge separation for the photocatalysts. However, the understanding and application of this strategy remain a significant challenge.

Structural-Functional Pluralistic Modification of Silk Fibroin via MOF Bridging for Advanced Wound Care.

Silk fibroin (SF) is widely used to fabricate biomaterials for skin related wound caring or monitoring, and its hydrogel state are preferred for their adaptability and easy to use. However, in-depth development of SF hydrogel is restricted by their limited mechanical strength, increased risk of infection, and inability to accelerate tissue healing. Therefore, a structure-function pluralistic modification strategy using composite system of metal organic framework (MOF) as bridge expanding SF's biomedical application is proposed.

Boosting hydrogen and oxygen evolution of porous CoP nanosheet arrays through electronic modulating with oxygen-anion-incorporation.

The exploration of earth-abundant single catalyst with high-efficiency bifunctional catalytic active sites for accelerated hydrogen and oxygen evolution reactions (HER and OER) is highly desirable but challenging. Herein, the synthesis of self-supported directional flake oxygen-incorporated cobalt phosphide arrays (O-CoP) with efficient bifunctional catalytic active sites was achieved by in situ oxidation followed by phosphorization of cobalt metal-organic framework nanosheet arrays (Co-MOF). By controlling the phosphating time, the P/O atomic ratio in the oxygen-incorporated cobalt phosphide could be adjusted, leading to the change of Co/Co couples, and thus affecting the electronic environment of the cobalt active site.

Highly clean and efficient iron phosphates modified by Ru nanocrystals for water oxidation.

Optimizing the architecture of non-polluting, highly efficient, robust, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is extremely crucial for accelerating the application of water splitting. Herein, a highly green and active OER electrocatalyst composed of Ru nanocrystal modified iron-rich phosphates is successfully developed a hydrothermal and post-annealing approach. The eco-friendly phosphorus source of lecithin is employed to fabricate transition metal phosphates for the first time, which avoids the use of toxic and dangerous phosphorus sources.

Ultrafast interfacial charge evolution of the Type-II cadmium Sulfide/Molybdenum disulfide heterostructure for photocatalytic hydrogen production.

The interfacial charge dynamics was crucial for semiconductor heterostructure photocatalysis. Through the rational design of the heterostructure interface, heterojunction expressed variable recombination and migration dynamics for excited carriers. Herein, followed by a typical chemical bath strategy with the hexagonal cadmium sulfide (CdS) overlapped on the exfoliated molybdenum disulfide (MoS) film, we developed a cadmium sulfide/molybdenum disulfide (CdS-MoS) nano-heterojunction and investigated the interfacial charge dynamics for photocatalytic hydrogen evolution.

Microbial synthesis of efficient palladium electrocatalyst with high loadings for oxygen reduction reaction in acidic medium.

Whereas limited amount of precious metal adsorbed by bacteria conflicting the needs of high loadings for better catalytic performances, cell disruption technology was adopted to smash Shewanella cells in this work, releasing abundant oxygen functional groups inside the cells for better adsorption of palladium ion. Then palladium catalysts were synthesized in two ways: 1) Pd catalyst supported on carbonized-broken-bacterial (Pd/FHNC) was obtained after direct carbonization and reduction; 2) Electrospinning technology was used to spin the broken Shewanella into fibers, and Pd nanoparticles supported on nitrogen-doped carbon nanofiber (Pd/NCNF) was prepared following carbonization and hydrogen reduction. The as-prepared catalysts exhibit excellent oxygen reduction reaction (ORR) electrocatalytic performance in the acid medium.

Investigating the active sites in molybdenum anchored nitrogen-doped carbon for alkaline oxygen evolution reaction.

Developing durable and efficient non-precious-metal based catalysts for oxygen evolution reaction (OER) is highly desirable in the field of electrocatalysis. In this work, a series of novel Mo anchored N-doped carbon catalysts (denoted as Mo/NC-T) were prepared starting from the zeolitic imidazolate framework 8 (ZIF-8) precursor. Firstly, Mo doped ZIF-8 precursor (Mo/ZIF-8) with a regular polyhedron structure was formed through a simple ion-exchange method process between molybdenum pentachloride (MoCl) and ZIF-8.

Controlled preparation of hollow ZnCdS nanospheres modified by NiS nanosheets for superior photocatalytic hydrogen production.

Developing durable and efficient photocatalysts for H evolution is highly desirable to expedite current research on solar-chemical energy conversion. In this work, a novel photocatalytic H evolution system based on ZnCdS/NiS nanocomposite was rationally designed for the first time. In this advanced composite structure, NiS nanosheets as a co-catalyst were intimately coupled to the inner surface of the hollow spherical ZnCdS.

Preparation and Performance Evaluation of Antibacterial Melt-Spun Polyurethane Fiber Loaded with Berberine Hydrochloride.

(1) Background: Bacterial infections have long threatened global public safety; hence, it is significant to continuously develop antibacterial fibers that are closely related to people's daily lives. Berberine hydrochloride is a natural antibacterial agent that has application prospects in the preparation of antibacterial fibers. (2) Methods: This study firstly verified the antibacterial properties of berberine hydrochloride and its possible antibacterial mechanism.