Surface modification of mild steel using 4-carboxyphenyl diazonium in sulfuric and hydrochloric acids. A corrosion study.

In this paper, the surface of mild steel is modified with 4-carboxyphenyl diazonium and subsequently, the corrosion behaviour of the modified surface is scrutinized in hydrochloric and sulfuric acid solutions. The diazonium salt was synthesized either in 0.5 M HCl or 0.

Porous perovskite CaMnO/rGO hybrid as an efficient electrocatalyst in lithium-oxygen batteries.

In this work, we demonstrate a facile route for synthesizing a novel CaMnO/reduced graphene oxide (CaMnO/rGO) nanohybrid as a cathode catalyst in Li-O batteries. The experimental results show that the CaMnO/rGO hybrid exhibits superior electrochemical properties compared to bare CaMnO perovskite oxide. Li-O batteries assembled with a CaMnO/rGO cathode catalyst show a remarkable initial discharge capacity of 19 000 mA h g at a high current density of 1000 mA g.