supported ru on periodic mesoporous organosilica as efficient catalyst for electrochemical water oxidation under alkaline medium

Electrochemical water splitting is an appealing technology to produce high-purity hydrogen as a clean and sustainable energy carrier. the efficiency of water splitting largely depends on the intrinsic activity, selectivity, and stability of the electrocatalysts. hence, soaring scientific endeavors have been made to develop high-performance electrocatalysts and uncover the underling reaction mechanisms. ruthenium (ru)-based nanomaterials are most promising for water splitting due to their favorable intrinsic activity, wide ph window, and high stability. in this study, a rationally designed ru@pmo porous heterocatalyst containing ionic liquid framework (to stabilizing the metal on the substrate) were used for electrochemical water oxidation in alkaline medium (1 m koh). this synthesized material catalyze water oxidation (wo), when it immobilized in carbon paste electrodes, with performances that exceed those of the benchmark system past catalysts, as probed by cyclic voltammetry (cv) and chrono amperometry (ca). this catalyst undergo continuous activation after polishing the surface of the electrode. the results herein reported highlight the remarkable potentialities of this catalyst. ru@pmo oxidizes water with potential equal to 1 v vs. nhe by 1.4 ma. cm-2 current. then the current gets to 10 ma. cm-2 at the potential equal to 1.06 v. the we observed maximum current equal to 197 ma at 2 v vs. nhe, that is much more than 3.60 ma. cm-2 current density of pt/c catalyst in pem electrolyser at the same potential. it’s notable that this catalyst and also the metal free pmo (periodic mesoporous organosilica) substrate can oxidized water under the nernst potential of oer half reaction.