Monomolecule Coupled to Oxygen-Doped Carbon for Efficient Electrocatalytic Hydrogen Peroxide Production.

The electrocatalytic production of hydrogen peroxide (HO) is an ideal alternative for the industrial anthraquinone process because of environmental friendliness and energy efficiency, depending on the activity and selectivity of catalysts. Carbon-based materials possess prospects as candidate catalysts for the production of HO. Herein, cedar-derived monolithic carbon catalysts modified with coupling oxygen doping and phthalocyanine molecules are synthesized.

Challenges and Prospects of Catalyst Design and Environmental Applications for On-Site Hydrogen Peroxide Production via Diverse (Photo)Electrochemical Reaction Pathways.

Hydrogen peroxide (HO) is an environmentally friendly and efficient oxidant with diverse applications in the chemical industry, medicine, energy, and environmental protection. While the anthraquinone oxidation process has traditionally dominated industrial HO production, its complexity and high pollution levels present significant challenges. In response, alternative methods such as electrochemical, photochemical, and photoelectrochemical pathways have emerged, providing greener and more sustainable solutions.

Impact resistance test system for the helmet based on a polyvinylidene fluoride piezoelectric sensor array.

As the most commonly used personal protection equipment (PPE) in various production activities, the impact resistance of the helmet is of great importance. Referred to the conventional experimental method, this study constructs a helmet impact resistance test system with a polyvinylidene fluoride (PVDF) sensor array. Compared with the traditional test method, this study installed PVDF sensors on the contact surface between the headform and the helmet.

Indoor Test System for Liquid CO Phase Change Shock Wave Pressure with PVDF Sensors.

Liquid carbon dioxide phase change fracturing technology (LCPCFT) has been widely used in engineering blasting due to the advantage of no flames, and no toxic and harmful gas. However, few studies have been conducted on the acquisition of shock wave pressure and its loading characteristics, which are key parameters in fracturing. Referring to the CO in-situ fracturing technology, an indoor test system for shock wave pressure generated during LCPCFT has been built, with a protected polyvinylidene fluoride (PVDF) piezoelectric sensor.