Catalyst-free contact-electro-catalytic H 2 O 2 synthesis via simple combination of a poly(tetrafluoroethylene) stir bar and ultrasound.

Herein, we present a catalyst-free contact-electro-catalytic method for synthesizing hydrogen peroxide (H 2 O 2 ) by combining continuous agitation with a poly(tetrafluoroethylene) (PTFE) stir bar and ultrasonication. A high H 2 O 2 production rate of 256.6 μM h -1 is achieved under ambient conditions without adding particle catalysts and sacrificial agents, which is competitive with recent advancements in redox technology. Eco-friendliness, convenience and efficiency make this process a promising alternative method for H 2 O 2 synthesis.