ru and ruo2 catalysts supported on ordered mesoporous organosilica for electrochemical water oxidation in acidic medium

Electrochemical water splitting constitutes one of the most promising strategies for converting water into hydrogen-based fuels, and this technology is predicted to play a key role in our transition towards a carbon-neutral energy economy. to enable the design of cost-effective electrolysis cells based on this technology, new and more efficient anodes with augmented water splitting activity and stability will be required. herein, we report two active ru@pmo and ruo2@pmo porous heterocatalysts containing ionic liquid framework (to stabilizing the metal on the substrate) were used for electrochemical water oxidation in acidic media (0.5 m h2so4). these synthesized materials catalyze water oxidation (wo), when they 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). these catalysts undergo continuous activation after polishing the surface of the electrodes. the results herein reported highlight the remarkable potentialities of these two catalysts. ru@pmo and ruo2@pmo respectively reach to 14 ma. cm-2 and 31 ma.cm-2 at 962 mv vs. nhe and maximum current equal to 171 ma and 282 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 these two catalysts and also the metal free pmo (periodic mesoporous organosilica) substrate can oxidized water under the nernst potential of oer half reaction.