A freestanding rotating triboelectric nanogenerator with large area and high efficiency for triboelectric plasma CO2 reduction

Fabrication of a large-scale, high-performance, high stability cylinder freestanding rotating triboelectric nanogenerator (FR-TENG) for mechanical -energy -driven CO 2 reduction is a bottleneck to be overcome. Herein, from the reasonable geometric structure and triboelectric materials, a cylinder -type, large -area, high -stability, and soft -contact FR-TENG with superior output performance was well -constructed. At the optimal conditions, the maximum short-circuit current of FR-TENG is 35.1 mu A, the maximum transferred triboelectric charge is 350 nC, and the conversion efficiency from mechanical to electrical energy is up to 16.7 %, which outperforms previously reported results under similar conditions. Applying it into triboelectric plasma reduction of CO 2 system, the evolution rates of CO and O 2 are 8.50 and 4.33 mu mol h -1 , respectively, and the conversion efficiency from mechanical to chemical energy is 1.84 %, which is better than most of the previous benchmark results in TENG driven-CO 2 reduction systems. Finally, this device is applied to field experiments, and the generation rates of CO and O 2 are obtained to be 5.06 and 2.33 mu mol h -1 at a wind speed of 2.3 m s - 1 , respectively, with a maximum energy conversion efficiency of 0.72 %. This work provides a promising strategy for CO 2 reduction systems driven by mechanical energy.