Nitrogen-doped carbon (NC) materials have been proposed as next-generation oxygen reduction reaction (ORR) catalysts to significantly improve scalability and reduce costs, but these alternatives usually exhibit low activity and/or gradual deactivation during use. Here, we develop new 2D sandwich-like zeolitic imidazolate framework (ZIF) derived graphene-based nitrogen-doped porous sheets (GNPCSs) obtained by in situ growing ZIF on graphene oxide (GO). Compared commercial Pt/C catalyst, the...

Development of an efficient hydrogen evolution reaction (HER) catalyst composed earth-abundant elements is scientifically and technologically important for the water splitting associated with conversion storage renewable energy. Herein we report a new class Co–C–N complex bonded carbon (only 0.22 at% Co) HER self-supported three-dimensional porous structure that shows unexpected catalytic activity low overpotential (212 mV at 100 mA cm–2) long-term stability, better than most...

Shape-controlled catalysis: High-quality Pt-Cu nanocubes with an average size of about 8 nm (see picture, scale bar = 20 nm) were synthesized from a high-temperature organic solution system in the presence various capping ligands. These cubic nanocrystals terminated {100} facets demonstrated superior catalytic activity towards methanol oxidation compared to similar sized and Pt nanospheres.

Identifying effective means to improve the electrochemical performance of oxygen-evolution catalysts represents a significant challenge in several emerging renewable energy technologies. Herein, we consider metal-nitrogen-carbon sheets which are commonly used for catalyzing oxygen-reduction reaction (ORR), as support load NiO nanoparticles (OER). FeNC sheets, advanced supports, synergistically promote nanocatalysts exhibit superior alkaline media, is confirmed by experimental observations...

The die is cast: electrocatalytic performance of Pt and Pt-Cu nanocubes with different compositions was investigated. Pt80Cu20 were found to have high activity remarkable long-term stability for formic acid oxidation. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by the authors. Please note: publisher responsible content functionality any supporting...

Metal nanowires (NWs) have become the most promising candidates for next generation of flexible transparent conductive electrodes (FTCEs), with high transmittance and low sheet resistance. In this work, ultralong silver NWs (Ag NWs), ∼220 μm (even larger than 400 μm) in length ∼55 nm diameter (aspect ratio: ∼4000), were synthesized via a one-pot polyol process using molecular weight poly(vinylpyrrolidone) (Mw = 1 300 000) an appropriate concentration FeCl3 (12.5 μM) through hydrothermal...

Bis-imidazolium based poly(ionic liquid), poly(1-butyl-3-(1-vinylimidazolium-3-hexyl)-imidazolium bis(trifluoromethanesulfonyl)imide) (Poly[BVIm][HIm][TFSI]) and mono-imidazolium poly(1-butyl-3-vinylimidazolium (Poly[BVIm][TFSI]), were synthesized dissolved in room temperature ionic liquids (ILs) to form quasi-solid-state electrolytes for dye-sensitized solar cells (DSSCs), without using any volatile organic solvent. Compared with poly[BVIm][TFSI], bis-imidazolium poly[BVIm][HIm][TFSI]...

A flexible freestanding air cathode inspired by traditional Chinese calligraphy art is built. When this novel electrode employed as both a new concept and current collector, to replace conventional rigid bulky counterparts, highly foldable Li-O2 battery with excellent mechanical strength superior electrochemical performance obtained.

High aspect ratio γ-MnOOH nanowires (MNWs) are synthesized by a simple one-step hydrothermal method and used as catalysts in rechargeable nonaqueous lithium-oxygen batteries. When the employed, great improvements discharge capacity, cycle stability, rate retention obtained, which attributed to high catalyst efficiency cathode porosity.

In this work, polydopamine-coated electrospun polystyrene (PS) nanofibrous mats were successfully prepared by simply immersing the PS into dopamine alkaline Tris buffer solution for 24 h. The successful growth of polydopamine (Pdop) was confirmed with X-ray photoelectron spectroscopy (XPS). thickness Pdop layer about 20 nm observed transmission electron microscope (TEM). wetting behavior changed tremendously superhydrophilicity. Combining unique characteristics as active secondary reaction...

Abstract Fabrication of non‐noble metal‐based heterogeneous catalysts by a facile and cost‐effective strategy for ecofriendly catalytic transfer hydrogenation (CTH) is great significance organic transformations. A cobalt@nitrogen‐doped carbon (Co@NC) catalyst was prepared from renewable biomass‐derived sucrose, harmless melamine, earth‐abundant Co(AcO) 2 as the precursor materials hydrothermal treatment carbonization. Co nanoparticles (NPs) were coated with NC shells uniformly embedded in...

Carbon nanofibers (CNF) with a 1D porous structure offer promising support to encapsulate transition-metal oxides in energy storage/conversion relying on their high specific surface area and pore volume. Here, the preparation of NiO nanoparticle-dispersed electrospun N-doped CNF (NiO/PCNF) as free-standing film electrode for high-performance electrochemical supercapacitors is reported. Polyacrylonitrile nickel acetylacetone are selected precursors Ni sources, respectively. Dicyandiamide not...

A stable Pd@TP-POP catalyst with highly dispersed ultrafine Pd NPs confined in its organic pores was fabricated for catalytic reduction of 4-nitrophenol and transfer hydrogenation aromatic aldehydes under very mild conditions.

We demonstrate a facile solution-phase method for the synthesis of single-crystal, high aspect ratio, and ultrathin nanowires hexagonal-phase Cu2S by thermal decomposition CuS2CNEt2 in mixed surfactant solvent dodecanethiol oleic acid at 160 °C. can be controllably synthesized with diameter as thin 1.7 nm length up to tens micrometers; they are usually aligned form bundles thickness hundreds nanometers. Based on experimental results, formation mechanism has been properly proposed. Some key...

CdS nanowires with an average diameter of 25 nm and lengths 20−40 μm have been solvothermally synthesized in a mixed solvent ethylenediamine dodecanethiol at 180 °C. The time-dependent examinations reveal that the formation process involves two sequential processes: short-period solid−solid transformation initial stage long-period Ostwald ripening process. effect both volume ratios between components reaction temperatures on nanowire growth has also investigated detail. results...

Abstract Nitrogen‐doped carbon (NC) materials have been proposed as next‐generation oxygen reduction reaction (ORR) catalysts to significantly improve scalability and reduce costs, but these alternatives usually exhibit low activity and/or gradual deactivation during use. Here, we develop new 2D sandwich‐like zeolitic imidazolate framework (ZIF) derived graphene‐based nitrogen‐doped porous sheets (GNPCSs) obtained by in situ growing ZIF on graphene oxide (GO). Compared commercial Pt/C...

Abstract Pollutants in wastewater include oils, dyes, and bacteria, making cleanup difficult. Multifunctional treatment media consisting of poly(ionic liquid)‐grafted polypropylene (PP) nonwoven fabrics (PP@PIL) are prepared by a simple scalable surface‐grafting process. The fabricated PP@PIL exhibit impressive switchable oil/water separation ( η >99 %) dye absorption performance q =410 mg g −1 ), as well high antibacterial properties. can be easily switched anion exchanging the PIL...

The fabrication of stable porous organic polymers (POPs) with heteroatoms that can firmly anchor noble metal nanoparticles (NPs) is a challenging and significant task for heterogeneous catalysis. In the current work, we used piperazine cyanuric chloride as precursors successfully fabricated PC-POP material. Then, through impregnation method subsequently reduction method, ultrafine Pt NPs were confined in high dispersion. NP active sites are accessible due to uniform mesopores facilitate...