Novel self-cleaning electrode developed for alkaline-earth metallic peroxide synthesis

Metallic peroxide (MO₂, M=Ca, Sr, Ba) is a substitute for hydrogen peroxide (H₂O₂). It has glorious oxidative properties, superior chemical stability, excessive purity, and is simple to retailer and transport. It has been broadly utilized in wastewater therapy and disinfection.

A Chinese language analysis group has developed a novel self-cleaning electrode by establishing a micro-/nanostructure of a extremely lively catalyst with acceptable floor modification, reaching extremely secure synthesis of alkaline-earth MO₂. Their research is printed in Nature Nanotechnology.

The present major synthesis technique of MO₂ entails quick decomposition of H₂O₂, resulting in inadequate utilization of H₂O₂.

On this research, led by Prof. Lu Zhiyi on the Ningbo Institute of Supplies Expertise and Engineering (NIMTE) of the Chinese language Academy of Sciences, in collaboration with Prof. Jia Jinping at Shanghai Jiaotong College, the researchers proposed an in situ electrochemical synthesis course of to minimize financial losses and scale back explosion dangers arising from H₂O₂ transportation and storage.

Excessive-concentration H₂O₂ generated by two-electron electrochemical oxygen discount (2e^– ORR) will be effectively transformed into MO₂ on the electrode floor. Nonetheless, extreme adhesion of stable MO₂ product to the electrode floor can immediately shut down the system.

To cut back floor adhesion, the analysis group constructed a Ni-doped oxygenated carbon electrode with Teflon coating (T-NiOC) in addition to a micro-/nanostructure and low floor power. This drastically lowered the stable–liquid contact space, facilitating fast detachment of in situ generated MO₂ from the self-cleaning electrode floor.

The T-NiOC electrode confirmed gathered selectivity of ~99% and stability for greater than 1,000 hours at a present density of fifty mA cm^-2 for electrochemical synthesis of MO₂, thus demonstrating broad software potential.

In contrast with H₂O₂, as-synthesized CaO₂ carried out higher in tetracycline degradation with hydrodynamic cavitation (HC).

This work may assist pioneer and revolutionize different electrochemical solid-state synthesis reactions.