Continuous Electrosynthesis of Pure HO Solution with Medical-Grade Concentration by a Conductive Ni-Phthalocyanine-Based Covalent Organic Framework.

Electrosynthesis of HO provides an environmentally friendly alternative to the traditional anthraquinone method employed in industry, but suffers from impurities and restricted yield rate and concentration of HO. Herein, we demonstrated a Ni-phthalocyanine-based covalent-organic framework (COF, denoted as ) with a higher inherent conductivity of 1.14 × 10 S m, which exhibited an ultrahigh current density of 530 mA cm with a Faradaic efficiency (HO) of ∼100% at a low cell voltage of 3.

Broadband radar cross section reduction by an absorptive metasurface based on a magnetic absorbing material.

A highly feasible approach to achieve a broadband radar cross section (RCS) reduction using a simple magnetic metasurface is presented. A magnetic absorbing material (MAM) with high permittivity and magnetic loss is introduced into the metasurface design instead of the more common dielectric material to considerably reduce its thickness. The metasurface is composed of an optimized two-dimensional array of MAM meta-atoms and a metal plate in back.