Scale-up synthesis of high-quality solid-state-processed CsCuX (X = Cl, Br, I) perovskite nanocrystal materials toward near-ultraviolet flexible electronic properties.

High-quality CsCuX and CsCuX (X = Cl, Br, I) nanocrystals (NCs) exhibit excellent optoelectronic, physical, and chemical properties for detection of UV radiation due to large carrier mobility and lifetime, and heavy atoms. The nanocrystal materials can be prepared a low-cost and simple solid-state synthesis. However, poor reproducibility and complex synthesis methods of obtaining perovskite NC thin films represent a drawback for the fabrication of the commercial photoelectric device.

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.

Near-UV Phototransistors Based on an All-Inorganic Lead-Free CsCuI/CuTCNQ Hierarchical Heterostructure.

With the rapid advances in metal halide perovskite optoelectronics, eliminating toxic lead from perovskites has been an urgent demand. However, state-of-the-art lead-free perovskite photodetectors are still challenged with issues of low photoresponse, poor stability, etc. Here, all-inorganic lead-free perovskite (CsCuI) single crystals that possess good stability under air exposure are synthesized via a facile solid reaction method.

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.

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.

N-doped carbon nanotubes supported CoSe nanoparticles: A highly efficient and stable catalyst for HO electrosynthesis in acidic media.

Unlabelled: Electrocatalytic oxygen reduction reaction (ORR) provides an attractive alternative to anthraquinone process for HO synthesis. Rational design of earth-abundant electrocatalysts for HO synthesis via a two-electron ORR process in acids is attractive but still very challenging. In this work, we report that nitrogen-doped carbon nanotubes as a multi-functional support for CoSe nanoparticles not only keep CoSe nanoparticles well dispersed but alter the crystal structure, which in turn improves the overall catalytic behaviors and thereby renders high O-to-HO conversion efficiency.

Honeycomb Carbon Nanofibers: A Superhydrophilic O -Entrapping Electrocatalyst Enables Ultrahigh Mass Activity for the Two-Electron Oxygen Reduction Reaction.

Electrocatalytic two-electron oxygen reduction has emerged as a promising alternative to the energy- and waste-intensive anthraquinone process for distributed H O production. This process, however, suffers from strong competition from the four-electron pathway leading to low H O selectivity. Herein, we report using a superhydrophilic O -entrapping electrocatalyst to enable superb two-electron oxygen reduction electrocatalysis.

Biomass based iron and nitrogen co-doped 3D porous carbon as an efficient oxygen reduction catalyst.

An iron and nitrogen co-doped 3D porous carbon catalyst with high performance for oxygen reduction reaction (ORR) is produced by pyrolysis. The precursor is a mixture of red date, ferrous (Ⅱ) acetate, and graphitic carbon nitride (g-CN). g-CN is the nitrogen source and also the sacrificial template, which plays a key role in the formation of a porous nitrogen rich carbon structure with high surface area.