Ultrathin single-crystal PtSe nanosheets for high-efficiency O electroreduction to HO.

Electrochemical synthesis of HO a two-electron oxygen reduction reaction (2e ORR) has emerged as a promising alternative to the anthraquinone process. However, the strong competition from the 4e pathway severely limits its activity and selectivity, especially for Pt-based catalysts. Herein, ultrathin single-crystal PtSe nanosheets were successfully prepared an selenization process using commercial Pt/C as a precursor, demonstrating an exclusive 2e ORR pathway compared to the 4e pathway of commercial Pt/C, delivering a high HO selectivity over a wide pH range (>80%, up to 94.

Electrocatalytic two-electron oxygen reduction over nitrogen doped hollow carbon nanospheres.

The two-electron oxygen reduction reaction (2e ORR) has become a hopeful alternative for production of hydrogen peroxide (HO), but its practical feasibility is hindered by the lack of efficient electrocatalysts to achieve high activity and selectivity. Herein, we successfully synthesized outstanding nitrogen doped hollow carbon nanospheres (NHCSs) for electrochemical production of HO. In 0.

Enhanced electrocatalytic performance of TiO nanoparticles by Pd doping toward ammonia synthesis under ambient conditions.

The traditional Haber-Bosch process in industry to produce NH leads to excessive CO emissions and a large amount of energy consumption. Ambient electrochemical N reduction is emerging as a green and sustainable alternative method to convert N to NH, but is in sore need of efficient and stable electrocatalysts. Herein, we propose using Pd-doped TiO nanoparticles as a high-efficiency electrocatalyst to synthesize NH under ambient conditions.

ZnO/CoS heterostructured nanoflake arrays vertically grown on Ni foam for high-rate supercapacitors.

Self-supported materials have been widely used in high-power energy storage devices due to the unique construction offering fast charge transfer from the active material to the conducting substrate. However, the electron conduction in the active material presents limitations on the overall performance of the electrode. In this work, we have fabricated hierarchical ZnO nanoflake arrays vertically grown on a nickel foam substrate and wrapped tightly by wrinkled porous CoS nanofilms (ZnO NFAs/CoS NFs) a hydrothermal process and subsequent electrodeposition.

TiO Nanoparticles with Ti Sites toward Efficient NH Electrosynthesis under Ambient Conditions.

Electrocatalytic nitrogen reduction reaction (NRR) enabled by introducing Ti defect sites into TiO through a doping strategy has recently attracted widespread attention. However, the amount of Ti ions is limited due to the low concentration of dopants. Herein, we propose TiO nanoparticles as a pure Ti system that performs efficiently toward NH electrosynthesis under ambient conditions.

Enhanced Electrochemical HO Production via Two-Electron Oxygen Reduction Enabled by Surface-Derived Amorphous Oxygen-Deficient TiO.

The electrochemical oxygen reduction reaction (ORR) is regarded as an attractive alternative to the anthraquinone process for sustainable and on-site hydrogen peroxide (HO) production. It is however hindered by low selectivity due to strong competition from the four-electron ORR and needs efficient catalysts to drive the 2e ORR. Here, an acid oxidation strategy is proposed as an effective strategy to boost the 2e ORR activity of metallic TiC via in-site generation of a surface amorphous oxygen-deficient TiO layer.

Easily fabricated and lightweight PPy/PDA/AgNW composites for excellent electromagnetic interference shielding.

Conductive polymer composites (CPCs) containing nanoscale conductive fillers have been widely studied for their potential use in various applications. In this paper, polypyrrole (PPy)/polydopamine (PDA)/silver nanowire (AgNW) composites with high electromagnetic interference (EMI) shielding performance, good adhesion ability and light weight are successfully fabricated via a simple in situ polymerization method followed by a mixture process. Benefiting from the intrinsic adhesion properties of PDA, the adhesion ability and mechanical properties of the PPy/PDA/AgNW composites are significantly improved.

Preparation and characterization of flexible lithium iron phosphate/graphene/cellulose electrode for lithium ion batteries.

In this work, a free-standing flexible composite electrode was prepared by vacuum filtration method with LiFePO, graphene and nanofibrillated cellulose (NFC). Compared with the pure LiFePO electrode, the resulting flexible composite (LiFePO/graphene/NFC) electrode showed excellent mechanical flexibility, and possessed an enhanced initial discharge capacity of 151 mA h/g (0.1 C) and a good capacity retention rate with only 5% loss after 60 cycles due to suitable electrolyte wettability at the interface.

Paper-Based Inkjet-Printed Flexible Electronic Circuits.

Printed flexible electronics have been widely studied for their potential use in various applications. In this paper, a simple, low-cost method of fabricating flexible electronic circuits with high conductivity of 4.0 × 10 S·m (about 70% of the conductivity of bulk copper) is demonstrated.

Defect effects on the physical and electrochemical properties of nanoscale LiFe0.92PO4 and LiFe0.92PO4/C/graphene composites.

Nanoscale LiFe0.92PO4 and LiFe0.92PO4/C/graphene composites including defects as performance-improved cathode materials for lithium-ion batteries were prepared by a carbothermal reduction method.