electrochemical water oxidation under neutral medium with ruthenium base catalysts

Conversion of solar energy into hydrogen-based fuels is considered to be one of the most promising alternatives to fossil fuels. [1] water is an inexpensive and readily available natural source of hydrogen, which has made electrochemical water splitting an intensively pursued research field in the recent decades. [2] however, the anodic reaction that leads to the oxidation of water to molecular oxygen is plagued by a high activation barrier, which has steered research towards the development of active and durable water oxidation catalysts (wocs). [3-6] the number of catalysts that catalyze water oxidation at high rate with low overpotential is limited, while ruthenium based catalysts can be particularly active. [3-6] we already knew that doping of nanoparticles on surfaces is an efficient method for designing heterogeneous water oxidation catalysts that lead to improve the properties of catalyst. [7] in this study, a rationally designed ru@pmo porous heterocatalyst containing ionic liquid framework were used for electrochemical water oxidation. this synthesized material catalyzes water oxidation, when it immobilized in carbon paste electrodes, with performances that exceed those of the benchmark system past catalysts, as probed by cyclic voltammetry and chrono amperometry. this catalyst undergo a continuous activation after polishing the surface of electrode. the results herein reported highlight the remarkable potentialities of this catalyst. ru@pmo oxidizes water with current equal to 10 ma. cm-2 at 1.19 v vs. nhe and maximum current is equal to 58.59 ma at 2 v vs. nhe. while current density of pt/c catalyst in pem electrolyser is 3.60 ma. cm-2 at 2 v vs. nhe. [8] it’s notable that this catalyst and also the metal free periodic mesoporous organosilica (pmo) substrate can oxidize water under the nernst potential of oxygen evolution reaction.