Ru-Doped Fe₂TiO₅ as a High-Performance Electrocatalyst for Urea-Assisted Water Splitting.

The urea oxidation reaction (UOR), with its low thermodynamic potential, offers a promising alternative to the oxygen evolution reaction (OER) for efficient hydrogen production. However, its sluggish kinetics still demand the development of an efficient electrocatalyst. In this study, the critical role of Ru doping in Fe₂TiO₅ is demonstrated to accelerate UOR kinetics.

Hydroxylation Strategy Enables Ru-Mn Oxide for Stable Proton Exchange Membrane Water Electrolysis under 1 A cm.

Ruthenium (Ru)-based catalysts have demonstrated promising utilization potentiality to replace the much expensive iridium (Ir)-based ones for proton exchange membrane water electrolysis (PEMWE) due to their high electrochemical activity and low cost. However, the susceptibility of RuO-based materials to easily be oxidized to high-valent and soluble Ru species during the oxygen evolution reaction (OER) in acid media hinders the practical application, especially under current density above 500 mA cm. Here, a manganese-doped RuO catalyst with the hydroxylated metal sites (i.

Targeting Synthesis of Diatomic Catalysts by Selective Etching and Sequential Adsorption of Metal Atom.

Diatomic catalysts featuring a tunable structure and synergetic effects hold great promise for various reactions. However, their precise construction with specific configurations and diverse metal combinations is still challenging. Here, a selective etching and metal ion adsorption strategy is proposed to accurately assign a second metal atom (M) geminal to the single atom site (M-N) for constructing diatomic sites (e.

Bi-doped ruthenium oxide nanocrystal for water oxidation in acidic media.

There is an urgent need to develop a cost-effective and highly efficient acidic OER catalyst to support the progress of proton exchange membrane water electrolysis technology. Ruthenium-based catalysts, which possess high activity and significantly lower cost compared to iridium-based catalysts, emerge as competitive candidates. However, their suboptimal stability constrains the wide application of RuO.

Deciphering in-situ surface reconstruction in two-dimensional CdPS nanosheets for efficient biomass hydrogenation.

Steering on the intrinsic active site of an electrode material is essential for efficient electrochemical biomass upgrading to valuable chemicals with high selectivity. Herein, we show that an in-situ surface reconstruction of a two-dimensional layered CdPS nanosheet electrocatalyst, triggered by electrolyte, facilitates efficient 5-hydroxymethylfurfural (HMF) hydrogenation to 2,5-bis(hydroxymethyl)furan (BHMF) under ambient condition. The in-situ Raman spectroscopy and comprehensive post-mortem catalyst characterizations evidence the construction of a surface-bounded CdS layer on CdPS to form CdPS/CdS heterostructure.

Tuning Intermediates Adsorption and C─N Coupling for Efficient Urea Electrosynthesis Via Doping Ni into Cu.

Simultaneous electrochemical reduction of nitrite and carbon dioxide (CO ) under mild reaction conditions offers a new sustainable and low-cost approach for urea synthesis. However, the development of urea electrosynthesis thus far still suffers from low selectivity due to the high energy barrier of CO formation and the subsequent C─N coupling. In this work, a highly active dendritic Cu Ni catalyst is developed to enable the highly selective electrosynthesis of urea from co-reduction of nitrite and CO , reaching a urea Faradaic efficiency (FE) and production rate of 39.

Ce Site in Amorphous Iron Oxyhydroxide Nanosheet toward Enhanced Electrochemical Water Oxidation.

Iron oxyhydroxide has been considered an auspicious electrocatalyst for the oxygen evolution reaction (OER) in alkaline water electrolysis due to its suitable electronic structure and abundant reserves. However, Fe-based materials seriously suffer from the tradeoff between activity and stability at a high current density above 100 mA cm . In this work, the Ce atom is introduced into the amorphous iron oxyhydroxide (i.

Single atomic Ru in TiO boost efficient electrocatalytic water oxidation to hydrogen peroxide.

Electrocatalytic two-electron water oxidation affords a promising approach for distributed production of HO using electricity. However, it suffers from the trade-off between the selectivity and high production rate of HO due to the lack of suitable electrocatalysts. In this study, single atoms of Ru were controllably introduced into titanium dioxide to produce HO through an electrocatalytic two-electron water oxidation reaction.

Photocatalytic co-production of hydrogen gas and -benzylidenebenzylamine over high-quality 2D layered InPSe nanosheets.

The concurrent photocatalytic synthesis of hydrogen gas and high-valued chemicals over two-dimensional semiconductors is extremely attractive to alleviate global energy and environmental concerns through directly using sunlight. Herein, a novel layered InPSe nanosheet is synthesized by a space confined chemical vapor conversion method, and it acts as a dual-functional photocatalyst to deliver the co-production of hydrogen gas and -benzylidenebenzylamine from water reduction and selective benzylamine oxidation. The simultaneous yield of hydrogen gas and -benzylidenebenzylamine is 895 μmol g and 681 μmol g, respectively, within 16-hour continuous reaction involving a small amount of water in acetonitrile solvent.

Intercalated Gold Nanoparticle in 2D Palladium Nanosheet Avoiding CO Poisoning for Formate Production under a Wide Potential Window.

The electrochemical CO reduction into formate acid over Pd-based catalysts under a wide potential window is a challenging task; CO poisoning commonly occurring on the vulnerable surface of Pd must be overcome. Herein, we designed a two-dimensional (2D) AuNP-in-PdNS electrocatalyst, in which the Au nanoparticles are intercalated in Pd nanosheets, for formate production under a wide potential window from -0.1 to -0.

Recent Trends in the Pyrolysis of Non-Degradable Waste Plastics.

Waste plastics are non-degradable constituents that can stay in the environment for centuries. Their large land space consumption is unsafe to humans and animals. Concomitantly, the continuous engineering of plastics, which causes depletion of petroleum, poses another problem since they are petroleum-based materials.

Recent progress on emergent two-dimensional magnets and heterostructures.

Intrinsic two-dimensional (2D) magnetic materials own strong long-range magnetism while their characteristics of the ultrathin thickness and smooth surface provide an ideal platform for manipulating the magnetic properties at 2D limit. This makes them to be potential candidates in various spintronic applications compared to their corresponding bulk counterparts. The discovery of magnetic ordering in 2D CrIand GrGeTenanostructures stimulated tremendous research interest in both experimental and theoretical studies on various intrinsic magnets at 2D limit.

Nonlayered Tin Thiohypodiphosphate Nanosheets: Controllable Growth and Solar-Light-Driven Water Splitting.

As a promising candidate in various fields, including energy conversion and electronics, layered van der Waals metal phosphorus trichalcogenides (MPX) have been widely explored. In addition to the layered structures, MPX comprising post-transition metals (i.e.

Subthermionic field-effect transistors with sub-5 nm gate lengths based on van der Waals ferroelectric heterostructures.

Overcoming the sub-5 nm gate length limit and decreasing the power dissipation are two main objects in the electronics research field. Besides advanced engineering techniques, considering new material systems may be helpful. Here, we demonstrate two-dimensional (2D) subthermionic field-effect transistors (FETs) with sub-5 nm gate lengths based on ferroelectric (FE) van der Waals heterostructures (vdWHs).

Two-Dimensional Unipolar Memristors with Logic and Memory Functions.

Two-dimensional materials have been widely used in electronics due to their electrical properties that are not accessible in traditional materials. Here, we present the first demonstration of logic functions of unipolar memristors made of functionalized HfSeO flakes and memtransistors made of MoS/graphene/HfSeO van der Waals heterostructures. The two-terminal memristors exhibit stable unipolar switching behavior with high switching ratio (>10), high operating temperature (106 °C), long-term endurance (>10 s), and multibit data storage and can operate as memory latches and logic gates.

Layered metal phosphorous trichalcogenides nanosheets: facile synthesis and photocatalytic hydrogen evolution.

Layered transition metal phosphorous trichalcogenide (MPX) materials have attracted immense attention due to their excellent optical and electrical properties. However, the controllable synthesis of ultrathin MPX nanosheets is still challenging. Here, we present a facile phosphosulfurization scheme to prepare high-quality layered FePS nanosheets, with ∼20 nanometers in thickness.

A unipolar nonvolatile resistive switching behavior in a layered transition metal oxide.

Two-dimensional layered materials have been considered as promising candidates for resistive random access memory, one of the most promising next-generation nonvolatile memories. However, due to the types of defects, most of the devices still suffer from poor environmental stability, defects inducing complexity, and uncontrollability. Here, we fabricate memory cells based on synthesized high-quality two-dimensional layered transition-metal oxide (α-MoO) nanosheets which can be thinned to 8.

Synthesis and Optoelectronic Applications of a Stable Type 2D Material: α-MnS.

α-MnS, as a nonlayered type material with a wide band gap of 2.7 eV, has been expected to supplement the scarcity of two-dimensional (2D) type semiconductors, which are desperately required for constructing atomically thin junctions. However, the preparation and property investigation of 2D α-MnS has scarcely been reported so far.

Anti-Ambipolar Transport with Large Electrical Modulation in 2D Heterostructured Devices.

Van der Waals materials and their heterostructures provide a versatile platform to explore new device architectures and functionalities beyond conventional semiconductors. Of particular interest is anti-ambipolar behavior, which holds potentials for various digital electronic applications. However, most of the previously conducted studies are focused on hetero- or homo- p-n junctions, which suffer from a weak electrical modulation.