Hybrid porous nanowire arrays composed of strongly interacting Co3O4 and carbon were prepared by a facile carbonization the metal-organic framework grown on Cu foil. The resulting material, possessing high surface area 251 m(2) g(-1) large content 52.1 wt %, can be directly used as working electrode for oxygen evolution reaction without employing extra substrates or binders. This novel smoothly operate in alkaline solutions (e.g., 0.1 1.0 M KOH), affording low onset potential 1.47 V (vs...

Abstract A new class of highly efficient oxygen evolution catalysts has been synthesized through the self‐assembly graphitic carbon nitride nanosheets and nanotubes, driven by π–π stacking electrostatic interactions. Remarkably, exhibit higher catalytic activity stronger durability than Ir‐based noble‐metal display best performance among reported nonmetal catalysts. This good result is attributed to high nitrogen content mass charge transfer in porous three‐dimensional nanostructure.

Abstract Flexible non‐metal oxygen electrodes fabricated from phosphorus‐doped graphitic carbon nitride nano‐flowers directly grown on carbon‐fiber paper exhibit high activity and stability in reversibly catalyzing reduction evolution reactions, which is a result of N, P dual action, enhanced mass/charge transfer, active surface area. The performance comparable to that the state‐of‐the‐art transition‐metal, noble‐metal, catalysts. Remarkably, flexible nature these allows their use folded...

Ultrathin graphitic carbon nitride (g‐C 3 N 4 ) nanosheets, due to their interesting two‐dimensional graphene‐like structure and unique physicochemical properties, have attracted great research attention recently. Here, a new approachis developed prepare, for the first time, proton‐functionalized ultrathin g‐C nanosheets by sonication‐exfoliation of bulk under an acid condition. This method not only reduces exfoliation time from more than 10 h 2 h, but also endows with positive charges....

Dual heteroatom-doped carbon materials are efficient electrocatalysts via a synergistic effect. With nitrogen as the primary dopant, boron, sulfur, and phosphorus can be used secondary elements for co-doped carbons. However, evaluation analysis of promotional effect B, P, S to N-doped carbons has not been widely researched. Here we report robust platform that is constructed through polydopamine prepare N,B-, N,P-, N,S-co-doped nanosheets, characterized by similar N species content doping....

Overall water splitting involved hydrogen evolution reaction (HER) and oxygen (OER) are critical for renewable energy conversion storage. Heteroatom‐doped carbon materials have been extensively employed as efficient electrocatalysts independent HER or OER processes, while those the bifunctional catalysts simultaneously generating H 2 O by seldom reported. Inspired unparalleled virtues of polydopamine, authors devise facile synthesis nitrogen sulfur dual‐doped nanotubes with in situ,...

Nowadays humans are facing difficult issues, such as increasing power costs, environmental pollution and global warming. In order to reduce their consequences, scientists concentrating on improving generators focused energy harvesting. Thermoelectric (TEGs) have demonstrated capacity transform thermal directly into electric through the Seebeck effect. Due unique advantages they present, thermoelectric systems emerged during last decade a promising alternative among other technologies for...

The biggest challenge in developing new energy conversion technologies such as rechargeable metal-air batteries, regenerated fuel cells and water splitting devices is to find suitable catalysts that can efficiently stably catalyze the key electrochemical processes involved. This paper reviews development of self-supported electrocatalysts three categories: growing on rigid substrates, soft free-standing catalyst films. They are distinct superior conventional powdery electrocatalysts, showing...

Three kinds of Mn 3 O 4 nanoparticles with different shapes (spheres, cubes, and ellipsoids) are selectively grown on nitrogen‐doped graphene sheets through a two‐step liquid‐phase procedure. These non‐precious hybrid materials display an excellent ORR activity good durability. The mesoporous microstructure, nitrogen doping, strong bonding between metal species doped found to facilitate the catalytic process. Among these three particles, ellipsoidal particles exhibit highest more positive...

Mesoporous MnCo2O4 materials with abundant surface defects are synthesized by a novel template-free method without using high temperature or pressure. Two important features achieved simultaneously, i.e. highly porous architecture large area up to 263 m2 g−1 and numerous oxygen vacancy defects, which favor efficient mass transport, greatly enhance the affinity of mesoporous toward O2, supply more accessible active sites. Consequently, electrocatalysts exhibit comparable catalytic activity...

Functionalized dendrimer-like hybrid silica nanoparticles with hierarchical pores are designed and synthesized. The unique structure, large surface area, excellent biocompability render such materials attractive nanocarriers for the advanced delivery of various sized drugs genes simultaneously.

Abstract One of the key challenges in developing gel‐based electronics is to achieve a robust sensing performance, by overcoming intrinsic weaknesses such as unwanted swelling induced deformation, signal distortion caused dehydration, and large hysteresis signal. In this work, structural gel composite (SGC) approach presented encapsulating conductive hydrogel/MXene with lipid (Lipogel) layer through an situ polymerization. The hydrophobic Lipogel coating fulfills SGC unique anti‐swelling...

Hydrogel electronics have attracted growing interest for emerging applications in personal healthcare management, human-machine interaction, etc. Herein, a "doping then gelling" strategy to synthesize supramolecular PANI/PAA hydrogel with specific strand entangled network is proposed, by doping the PANI acrylic acid (AA) monomers avoid aggregation. The high-density electrostatic interaction between PAA and chains serves as dynamic bond initiate entanglement, enabling PAA/PANI...

Since the first reported thermal phase transition of poly(N-isopropylacrylamide) by Heskin in 1968, this unique polymer has continued to gain popularity. Because their potential applications field biomedical science, various responsive polymeric systems, such as those induced pH, salt, co-solvent, thermal, light, electric and magnetic field, have been synthesized studied. This review reports on recent developments (over last 10 years) thermo- photo-responsive homopolymers, copolymers,...

Perovskites show excellent specific catalytic activity toward both oxygen reduction reaction (ORR) and evolution (OER) in alkaline solutions; however, small surface areas of the perovskites synthesized by traditional sol-gel methods lead to low utilization sites, which gives rise poor Li-O2 batteries performance restricts their application. Herein, a hierarchical mesporous/macroporous perovskite La0.5Sr0.5CoO3-x (HPN-LSC) nanotube is developed promote its application batteries. The HPN-LSC...

The use of polydopamine as a nitrogen containing precursor to generate catalytically active nitrogen‐doped carbon (CN x ) materials on nanotubes (CNTs) is reported. These N‐doped CN /CNT display excellent electrocatalytic activity toward the reduction triiodide electrolyte in dye‐sensitized solar cells (DSSCs). Further, influence various synthesis parameters catalytic performance /CNTs investigated detail. best performing device fabricated with material delivers power conversion efficiency...

Composite materials combining nitrogen-doped carbon (NC) with active species represent a paramount breakthrough as alternative catalysts to Pt for the oxygen reduction reaction (ORR) due their competitive activity, low cost and excellent stability. In this paper, simple strategy is presented construct graphene oxide–polydopamine (GD) based nanosheets. This approach does not need modify use any catalyst polymerization under ambient conditions, obtained nanosheets possess adjustable...

The binding behaviors between poly(ethylene glycol) (PEG) and sodium dodecyl sulfate (SDS) were examined by isothermal titration calorimetry (ITC) technique. interactions PEG SDS are dependent on the molecular weights of PEG. At low weight (MW < 400 Daltons), does not bind to chains. As increases from 900 1450 Daltons, an endothermic peak, which is attributed formation SDS/PEG aggregation complex polymer-induced surfactant micellization process observed. micelles lower number adsorb...