Contact-electro-catalysis (CEC)

Abstract

Contact-electro-catalysis (CEC) is an emerging field that utilizes electron transfer occurring at the liquid–solid and even liquid–liquid interfaces because of the contact-electrification effect to stimulate redox reactions.

Contact-electro-catalysis under natural and industrial conditions: mechanisms, strategies, and challenges

“…CEC utilizes the intrinsic mechanism of electron transfer when S–L or liquid–liquid interfaces come into contact each other under mechanical force disturbance to drive redox reactions. 56 The electron cloud potential wells of the atoms overlap strongly under the high pressure generated by collapsing cavitation bubbles, 57 the impact of water flow, 14 or the gravity of a water drop. 13 As the electron transfer barrier between the electron cloud potential wells decreases, 58 electrons are transferred from the water phase to the solid phase catalyst, producing radical cations in water, and several electrons exist on the surface of the solid catalyst.…”

Catalyst-free contact-electro-catalytic H2O2 synthesis via simple combination of a poly(tetrafluoroethylene) stir bar and ultrasound

“…Contact-electro-catalysis is an emerging redox technology that has almost no restriction on the choice of catalysts, which widely exist at various surfaces, including solid and solid, solid and liquid, solid and gas, liquid and gas, etc. 14 Contact electrification between different substrates can generate a strong interfacial electric field (10 9 –10 10 V m −1 ) that induces subsequent redox reactions. 15–19 For instance, ultrasound induced water–poly(tetrafluoroethylene) (PTFE) particle contact-electro-catalysis can enable direct synthesis of H 2 O 2 under ambient conditions.…”