Covalently Modified Electrode with Pt Nanoparticles Encapsulated in Porous Organic Polymer for Efficient Electrocatalysis

Imidazolium-based porous organic polymer is employed to be chemically modified onto the surface of glassy carbon electrode via silane chemistry and alkylation and to support Pt nanoparticles. Pt nanoparticles with an average size of ca. 2.28 nm are loaded, and the modified electrode exhibits high activity toward hydrogen evolution reaction with a low overpotential of 56 mV at 10 mA cm–2 versus the reversible hydrogen electrode, which is lower to that of commercial Pt/C, and additionally it shows long-term durability of 4000 cycles. It provides a new strategy for the development of catalytic porous electrodes with supported nanocatalysts.