Abstract
A superhydrophilic Ru-based 3D electrode, denoted as Ru-PA/NF, was fabricated under the assistance of phytic acid (PA) for electrocatalytic hydrogenation of p-Nitrophenol. PA serves as a multifunctional modulator to facilitate the dispersion of active Ru species in porous nickel foam (NF), meanwhile enhance the surface wettability as well as adjust the micromorphology. In alkaline media, the Ru-PA/NF electrode shows the PNP conversion of 94.68% and the PAP selectivity of 99% after 9 h, accompanied by the faraday efficiency (FE) of 73.15%. Over the superhydrophilic Ru-PA/NF the rate constant of PNP conversion into PAP is 2.62-times higher than that over the hydrophobic Ru/NF prepared without the aid of PA, and FE of Ru-PA/NF is 1.28-times higher than Ru/NF. This can be ascribed to intriguing features of Ru-PA/NF involving higher Ru loading, more exposed sites, superior electrolyte wetting along with faster charge transfer rate.
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