Platinum nanoparticle synthesis in engineered organic nanoscale reactors for efficient oxygen electro-reduction in alkaline conditions

We have designed a polymer, hc-TBtd-COP incorporating a Wurster-type redox-active building unit for the in situ reduction and nucleation of platinum nanoparticles which forms an organic polymer-wrapped metal nanoparticle composite. This composite exhibits exceptional mass activity (MA) (about 5 times larger than 20% Pt/C at 0.9 V vs. RHE) and specific activity (SA) (approximately 2 times larger than 20% Pt/C at 0.9 V vs. RHE) for the oxygen reduction reaction. The efficient electrocatalysis results from higher catalytic site dispersion and superior atom utilization efficiency. This research contributes to the advancement of composite materials for enhanced electrocatalytic performance.